SlideShare ist ein Scribd-Unternehmen logo
1 von 82
S U R V E Y
PROCEDURES IN
D E N T I S T R Y
B.Deepthi ragasree
BDS (final year)
Survey is a non-experimental type of
research that attempts to gather information
about the status quo for a large number of
people by describing present conditions
without directly analyzing their causes.
Definition
Types of survey
Analytical surveyDescriptive survey
Longitudinal
survey
Cross sectional
survey
Longitudinal
survey
Cross sectional
survey
Monitoring trends in oral
health
and disease:
When national
surveys are repeated
periodically under general
similar conditions, broad oral
health trends over time can
be estimated, provided the
sampling design so
permits.The
WHO's pathfinder survey
protocol when repeated
periodically can assess
trends in health and disease
and it is assumed that the
results are valid enough to
support national policy
decisions.
Policy development:
Survey data can be used to
establish oral
health strategies. Scotland
has successfully
used survey data to develop
its oral health
policy. A number of
American States
switched their primary
preventive focus from
fluoride mouth-rinsing to
sealant application
after statewide surveys
showed most carious
lesions to be in pits and
fissur
Program evaluation:
Survey data are
often used to evaluate
programs though the
principle that
association does not
show cause-and-effect
needs to be
remembered.The success
of particular programs
can only be inferred from
survey data, though the
more localized the survey
and the program, then
the more plausible is the
inference.
Assessment of dental
needs:
Although surveys
can be used for assessment
of needs, there is a clear gap
between the criteria used in
surveys and those applied
for individual patient care.
e.g. criteria for caries in
surveys usually are based on
cavitation, but dentists
generally intervene at
an earlier stage in the
carious process.
Providing visibility to
dental issues:
The visibility that oral
health acquires through
the mere existence of
data from a national
survey may be the most
important of all uses of
survey data.
METHODS OF DATA COLLECTION
 Health interview survey: (face-to-face survey)
It is an invaluable method of measuring
subjective phenomena, such as perceived morbidity, disability and impairment;
opinions, beliefs and attitudes and some behavioral characteristics.
 Health examination survey: This survey is carried out by teams consisting of
doctors and auxiliaries.
Disadvantages:
1)It is expensive and cannot be carried out on an extensive scale.
2)The method also requires consideration of providing treatment to people found
suffering from certain disease.
METHODS OF DATA COLLECTION
 Health records survey : It involves the collection of data from health service
records. This is obviously the most economical method of collecting data.
Disadvantages:
a. The data obtained is not population-based.
b. Reliability is open to question.
c. Lack of uniform procedures and standardization in the recording of data.
 Questionnaire survey:
The use of questionnaires and interviews is
a standard method of data collection in
clinical,epidemiological, psychosocial
and demographic research. It is used for
measuring subjective phenomena.
METHODS OF DATA COLLECTION - QUESTIONARIE SURVEY
Types:
1) Mailed
questionaries
2) Telephone
questionaries
3)Face-to-face
questionaries
ADVANTAGES:
• Simple
• Economical
• Standardization -
Written instructions
reduce biases from
differences in
administration.
• Anonymity -Privacy
encourages candid
and honest
responses to
sensitive questions.
Disadvantages:
A certain level of
education and skill is
expected from the
respondents.
There is usually a high
rate of nonresponse.
Open ended
questions-
Free response
Closed ended
questions- fixed
alternative
The subject answers in his own words. This may produce difficulties when
interpreting the responses, e.g. How many cigarettes do you smoke per day?
They are answered by choosing from a number of fixed alternative
response.
Eg: How many cigarettes do you smoke per
day?
a. Upto -10 b. 10-20
c. 20 -30 d. More than 30
The 2 types of scales most commonly used are :
1)Likert Scale: (Summative)
2)Guttman scale: (Cumulative)(Scalogram)
????
Likert Scale: (Summative) Commonly used to quantify
attitudes and behavior. Respondents are asked to select a
response that best represents the rank or degree of their
answer.
E.g. The respondent may be asked to indicate whether he
strongly agrees, agrees, neither, disagrees or strongly
disagrees with the statement. Each response is assigned a
number. The points of each item is added.
Guttman scale: (Cumulative) (Scalogram)
These contain a series of statements that
express increasing intensity of a characteristic.
The respondent is asked to agree or disagree
with each statement. The respondents score is
the total number of items with which he agrees
or disagrees.
Establishing
the objective
Designing the
investigation
Selecting the
sample
Conducting the
examinations
Analyzing the
data Drawing the
conclusions
Publishing the
results
1
3
2
4
5
6
7
1) Establishing the objectives:
 The objectives can either be stated in the form of a hypothesis which is to be
tested, or, the objective may be stated by describing what is to be measured.
 The starting point of a study is frequently an expression of a null hypothesis, which
states that there is no difference between the groups.
Eg: There is no difference in the periodontal
status of males and females aged 35-44 years in
Mangalore. The objective of the
study is then to test this hypothesis
Eg: To determine the prevalence of dental
caries among 12 year old school children
in Mangalore.
2) Designing the investigation:
Survey protocol: It is important to prepare a written protocol
for the survey, which should contain,
 Main objective and purpose of the survey,
 A description of the type of information to be collected and
of the methods to be used.
 A description of the sampling methods to be used.
 Personnel and physical arrangements.
 Statistical methods to be used in analyzing the data.
 A provisional budget.
 A provisional time-table of main activities and responsible
staff.
1 ) Obtaining approval from authorities:
Permission to examine population groups must usually be obtained
from a local, regional or national authority.
E.g. If school populations are to be examined, schoolauthorities and
the parents should be approached for obtaining permission.
2) Emergency care and referral:
All survey teams should be equipped for and
ready to provide emergency care if required.
It is also the responsibility of the examiner to
ensure an appropriate care facility is made.
3 ) Budgeting: A budget for the survey should be prepared
which should include all the resources required to carry out the
survey.
3) Selecting the sample:
Sample
Collect information from these
people to find answers to your
Research questions
Study population:
Sampling units
Make an estimate of their
prevalencein the study
population from sample
findings
Select a few
sampling units from
the study
population
Reference or
parent
population
METHODS OF SAMPLING :
1) Simple random sampling
 It is a technique whereby each
sampling unit has the same probability
of being selected.
 Every item in population has an equal
chance of being included.
Basic procedure:
• Prepare a sampling frame
• Decide on the size ofthe sample
• Select the required number of unit
1) Simple random sampling
LOTTERY METHOD TABLE OF RANDOM
NUMBERS
 Here the population units are
numbered on separate slips of paper of
identical size and shape
 These slips are then shuffled and blind
fold selection of the number of slips is
made to constitute the desired sample
size
Random numbers are haphazard
collection of certain numbers,
arranged in a cunning manner to
eliminate personal selection or the
unconscious bias in taking out the
sample
 The first unit is chosen at random and
then, other units are chosen in a
systematic way.
 E'.g. Every third patient visiting the
dentist.
(2) Systematic sampling
(3) Stratified sampling
The population is first divided into
subgroups or strata according to
certain common characteristics. Then
random or systematic sampling is
performed independently in each
stratum:
 Stratified random sampling
 Stratified systematic sampling
(4) Cluster sampling
A simple random sampling is
selected, not of individual subjects,
but of groups or clusters of
individuals.
The sampling units are clusters and
the sampling frame is a list of these
clusters
(5) Multiphase sampling
This is used to take basic data from a large sample
and details from a subsample.
 It is a sub-sampling within groups chosen as
cluster samples. The first stage is to select the
groups or clusters.
 Then sub-samples are taken in as many
subsequent stages as necessary to obtain the
desired sample size
 Eg : Nutritional status of the country
(6)Multistage sampling
(7) Panels
They are useful for studying trends. A sample is randomly
selected and then data are collected from the sample on
several occasions.
E.g. Every person is interviewed every 6 months.
 A small sample is tested in order to answer certain
questions about the population.
 If the questions are not answered, the number of
subjects or units in the sample is increased
gradually until the conclusions may be drawn.
(8) Sequential sampling
 The examination should be as automatic as
possible to obviate excessive intrusion of
subjective thought. Therefore it should be
performed quickly.
 The object of epidemiological surveys is to
examine subjects in fairly large numbers.
Excessive time spent on each individual
necessitates a reduction in the number of
individuals seen.
4.Conducting the Examination : BASIC ORAL HEALTH
EXAMINATION
5 - 10 minutes
15 - 20 minutes
• Plane mouth mirrors - 30 per examiner
• Periodontal probes - 30 per examiner
• Several pair of tweezers
• Containers and concentrated sterilizing solution.
• A wash basin
• Cloth or paper hand towels
• Gauze.
Instruments & supplies
Infection control :
Current national recommendations and
standards should be followed for
• Infection control
• Waste disposal
• Disposable masks, gloves, protective eyewear
recommended.
CHAIR: Preferable with a head rest. Most comfortable
situation is for the subject to be on a table/bench,
and examiner to sit behind the subject’s head.
ILLUMINATION: A separate unit lamp attached to
head of the examiner fibre optic light source.
CLEANING: Method to remove loose debris where
necessary.
ASSESSMENT FORMS: Adequate supply. Avoidance of
crowding and noise around the examiner.
RECORDER: Live or tape for receiving information
called by the examiner.
ORGANIZING CLERK: To maintain constant flow of
subjects and to enter general descriptive info on
forms.
EXAMINATION AREA :
It is used to calculate intra and inter examiner
reproducibility.
 It is an index which compares the agreement
against that which might be expected by chance.
 Kappa can be thought of as the chance-corrected
proportional agreement, and possible values range
from + 1 (perfect agreement) via 0 (no agreement
above that expected by chance) to -1 (complete
disagreement).
KAPPA STATISTIC:
KAPPA VALUE INTERPRETATION
1 Total agreement
> 0.8 Good
agreement
0.6 - 0.8 Substantial
agreement
0.4 - 0.6 Moderate
agreement
CLASSIFICATION OF TYPES OF INSPECTION AND
EXAMINATION :
TYPE 1: Complete examination using mouth mirror
,explorer, good illumination, full mouth radiographs, &
additional diagnostic methods (pulp testing, study models,
transillumination etc.)
TYPE 2: Limited examination, using mouth mirror and
explorer, bitewing radiographs. Periapical radiographs if
indicated.
TYPE 3: Inspection using mouth mirror ,explorer & good
illumination.
TYPE 4: Screening procedure - tongue depressor,
available illumination.
(5)ANALYZING DATA :
Once the examination procedures of a survey have been completed,
the work of assembling the material and interpreting it begins.
01
02
The analysis of findings has two
components:
Data processing (statistical analysis)
Interpretation of result
(6) Drawing the conclusions and publishing the report:
The conclusions are specifically related to
the investigation that has been carried out
and The final step in a survey procedure should be
the construction of a report with or without a set of
recommendations. Clearness and simplicity should
be sought.
1. Statement of the purposes of the survey.
2. Material and methods.
A) Description of area and population served.
B) Types of information collected
C) Methods of collecting data
D) Sampling method
E) Examiner personnel and equipment
F) Statistical analysis and computational procedure
G) Cost analysis
H) Reliability and reproducibility of results.
3. Results: They should be tabulated and illustrated
appropriately.
4. Discussion and conclusions: The investigations, its
findings and its conclusions are discussed.
5. Summary.
ORAL HEALTH SURVEYS
PATH FINDER SURVEYS
The special factors associated with the most
common oral diseases which have enabled a
practical economic survey sampling methodology to
be defined, called the
"pathfinder method".
The "pathfinder method" is a stratified cluster
sampling technique, which aims to include the most
important population subgroups likely to have
differing disease levels.
PATH FINDER
NATIONAL PATH
FINDER SURVEY
PILOT SURVEY
PILOT SURVEY NATIONAL PATH FINDER SURVEY
 Only the most important
subgroups in the
population.
 One or two index ages
 12 years and one other
age group.
 Provides the maximum
amount of data needed
to commence planning
 Incorporates sufficient
examination sites to cover all
important subgroups of the
population
 Atleast three of the index age
groups.
 Suitable for collection of data for
planning purposes & monitoring
of oral health programmes in all
countries regardless of the level
of disease, availability of
resources/complexity of care.
5
years
12
years 15
years
35 -44
years
65 - 74
years
5 YEARS INDEX AGE GROUP
Children should be examined between 5th - 6th
birthdays.
• Caries levels in Primary dentition
• Exhibit changes over a short span of time than
in permanent dentition at other index ages
• In some countries, 5 years is also the age at
which children begin primary school.
12 YEARS INDEX AGE GROUP
• Children leave primary school.
• Last age at which a reliable sample may be
obtained easily through school system.
• All permanent teeth (except 3rd molars)
are likely to have erupted.
• Chosen as “global indicator age group
for international comparisons and
surveillance of disease trends”
15 YEARS INDEX AGE GROUP
• Permanent teeth - exposed to oral
environment for 3-9 years.
• Assessment of caries prevalence and
periodontal disease in adolescents. (15-19yrs)
• In countries where it is difficult to obtain a
reliable sample of this
age group, it is customary to examine
individuals in two-three areas
35 - 44 YEARS INDEX AGE GROUP
Standard age group for surveillance of oral
health conditions in adults.
• Planners & decision-makers can assess the full
effect of dental caries, level of severe
periodontal involvement, & general effects of
oral health care provided.
• Samples can be derived from organized
groups - office, factory workers etc.
• Care must be taken to avoid obvious selection
bias.
65 - 74 YEARS INDEX AGE GROUP
• Has become important with the changes in
age distribution of populations and the
worldwide increase in lifespan.
• Estimate the manifestation of oral disease
from a life course perspective.
• Data needed : planning appropriate
interventions for older people and
for assessment of the ultimate effect of oral
health programmes
• Sampling - care should be taken to sample
adequately both house bound & active
members of this age group.
NUMBER OF SUBJECTS
The number of subjects in each index age group to
be examined ranges from a minimum of 25 to 50
for each cluster or sampling site, depending on the
expected prevalence and severity of oral diseases.
If this cluster distribution is applied to four index ages in the population
under study, the total sample is 4 x 300 = 1200.
Permits the identification of differences
- between urban and rural group.
- between socioeconomic groups.
- areas where prevalence is much higher or lower.
THE WHO ORAL HEALTH ASSESSMENT FORM
(1997)
The WH O Oral Health Assessment Form 1997 is a universally accepted and
used recording methodology for oral health surveys.
STANDARD CODES
 If some of the oral health assessments are not carried out, or are not
applicable to the age group being examined, the unused sections of the
form should be canceled with a diagonal line, or by using code 9.
 The forms are designed to facilitate computer processing of the result.
 The two-digit numbers above or below some of the boxes indicate specific
teeth, according to the system used by the International Dental Federation
(FDI).
1. Survey identification information
2. General information
3. Extra-oral examination
4. Temporomandibular joint assessment
5. Oral mucosa
6. Enamel opacities/hypoplasia
7. Dental fluorosis
8. CPI (periodontal status, formerly called Community Periodontal Index of
Treatment Needs or CPITN)
9. Loss of attachment
10.Dentition status and treatment need
11 .Prosthetic status
12.Prosthetic need
13.Dentofacial anomalies
14.Need for immediate care and referral
15. Notes
ORAL HEALTH ASSESSMENT FORM SHOULD
INCLUDE
ORAL HEALTH ASSESSMENT FORM - 1997
ORAL HEALTH ASSESSMENT FORM - 1997
ORAL HEALTH ASSESSMENT FORM - 1997
ORAL HEALTH ASSESSMENT FORM - 1997
• During planning - a list of examination sites & of
the examiners involved in the study should be made
& a code assigned to each examiner.
• The coding list should also include the numeric
codes to be used for other relevant information
such as the fluoride content of drinking water or
use of fluoride supplements.
Identification and general
information sections of the form
• Country in which the survey is carried out.
• Should not be filled by the investigator.
BOX 1 - 4
WHO code for the country
• Should be recorded at the time of examination.
• Enables an investigator to refer back to examinations held
on any particular day which may need to
be reviewed or checked.
BOX 5 - 8
Essential info: year, month, date
• Each subject examined should be given an identification number.
• Should always have the same number of digits as the total
number of subjects.
• e.g:1200 subjects . . . first subject - 0001.
• If possible, ID no.s be entered before commencing the
examinations.
BOX 11- 14
Identification number
• If more than one examiner is participating in the survey.
• Each examiner should be assigned a specific code.
BOX 15
EXAMINAR
• If the subject will be re-examined to assess reproducibility,
original examination is scored “1” & any subsequent examinations
are coded “2”, “3”, “4” etc.
• For all subjects for whom duplicate examinations are made, data
from the 1st examination only are included in
the survey analysis.
BOX 16
Original / Duplicate examination
• In Block letters.
• In some countries, identification of survey subjects by name is
not permitted, in such case - space should be left blank.
NAME
• Year, month and day of birth
• For cross-checking purposes.
• age at last birthday.
• 6 years is coded as “06”.
• when age is not known - ‘estimated age’: eruption
status, major life events etc.
• Manner of estimation should be reported.
Date of birth (17 - 20)
Age (21 - 22)
SEX - 23
• Must always be recorded, because it is not
always possible to tell a person’s sex from the
name alone.
• 1 = Male, 2 = Female.
• In different countries, ethnic groups may be identified in
different ways, by area or country of origin, race, color, language,
religion or tribal membership.
• local health & education authorities should be consulted.
• May be obtained from govt. agencies or school administrative
data at the time of sample selection.
Other Group: To identify different subpopulation groups.
BOX 24 Ethnic group
A coding system should be devised according to local usage to identify
different occupations and appropriate code entered.
BOX 25 OCCUPATION
BOX 26 - 27 Geographical location:
• To record the site where examination is being conducted.
• 01 - 98
• ’99’ entered if this information is not recorded.
• Community information is useful for health administrators for planning or
revising programs or strategies.
• General information about the local environmental conditions
& availability of services at each site.
1 Urban site
2 Periurban area: areas surrounding major towns with very few
health facilities & limited access.
3 Rural area or small village.
BOX 28
LOCATION
• use of tobacco, SES, physical environment, levels of fluoride
etc.
• Frequency of sugar intake.
BOX 29 - 30
OTHER DATA
Examiners should use their judgement in matter.
The following codes are used ;
0 - No contraindication
1 - Contraindication
BOX 31
Contraindication to examination
In order, to ensure that all conditions are
detected and diagnosed, it is recommended
that the clinical examination follows the order
of the assessment form.
CLINICAL ASSESSMENT
EXTRA ORAL EXAMINATION - BOX- 32
The extra-oral examination should
be performed in the following
sequence :
 a) general overview of exposed
skin areas-(head, neck, limbs)
 b) perioral skin areas (nose,
cheeks, chin)
 c) lymph nodes (head, neck)
 d) cutaneous parts of upper &
lower lips
 e) vermilion border and
commissures
 f) temporomandibular joint &
Parotid gland region
The following codes and criteria are
used;
 0 - Normal extra-oral appearance,
 1 - Ulceration, sores, eriosions, fissures
 2 -Ulceration, sores, erosions, fissures,
nose, cheeks, chin.
 3 -Ulceration, sores, erosions, fissures
,commissures
 4 - Ulceration, sores, erosions, fissures
,vermilion border.
 5 - Cancrum oris.
 6 -Abnormalities of upper and lower lips
(e.g., clefts)
 7 -Enlarged lymph nodes - head, neck
 8 -Other swelling of the face & jaws.
 9 - Not recorded.
Temporomandibular joint
assessment: (boxes 33 - 36)
Symptoms (box 33).
The following codes and criteria are
used;
0 - No symptoms
1 - Occurrence of clicking, pain or
difficulties in opening or closing the
jaw once or more per week.
9 -Not recorded.
Signs (boxes 34 - 36).
The following codes and criteria are used;
0 - No signs
1 - Occurrence of clicking, tenderness (on
palpation) or reduced jaw mobility (opening
< 30 mm).
9 - Not recorded.
 Clicking (box 34) of one or both temporomandibular joints.
 Tenderness (on palpation) (box 35) of the anterior temporalis
and/or masseter muscles on one or both sides.
 Reduced jaw mobility (box 36) - opening of < 30 mm , taken as the
distance between the incisal tips of the central maxillary and
mandibular incisors
Oral mucosa: (boxes 37 - 42)
The examination should be thorough and systematic and be
performed in the following sequence :
a) Labial mucosa and labial sulci (upper and lower)
b) Labial part of the commissures and buccal mucosa (rightand left).
c) Tongue (dorsal and ventral surfaces, margins)
d) Floor of the mouth
e) Hard and soft palate
f) Alveolar ridges/ gingiva (upper and lower).
The codes and criteria are :
0 - No abnormal condition
1 - Malignanttumor (oral cancer).
2 - Leukoplakia
3 - Lichenplanus
4 - Ulceration (aphthous, herpetic,
traumatic)
5 - Acute necrotizing gingivitis
6 - Candidiasis
7 - Abscess.
8 - Other condition (specify if
possible)
9 - Not recorded.
The main location of the oral
mucosal lesion(s) should be
recorded in boxes 40 - 42 as
follows;
0 - Vermilion border
1 - Commissures
2 - Lips
3 - Sulci
4 - Buccal mucosa
5 - Floor of the mouth
6 - Tongue
7 - Hard and/or soft palate
8 - Alveolar ridges/gingiva.
9 - Not recorded.
Enamel opacities / hypoplasia: boxes ( 43 - 52)
The codes and criteria are as follows:
 0 - Normal
 1 - Demarcated opacity
 2 - Diffuse opacity
 3 - Hypoplasia
 4 - Otherdefects
 5 - Demarcated and diffuse opacities
 6 - Demarcated opacities and hypoplasia
 7 - Diffuse opacity and hypoplasia
 8 - All three conditions
 9 - Not recorded
Dental fluorosis: (box 53)
Fluorotic lesions are usually B/L symmetrical.Horizontal striated
pattern across the tooth. Premolars > 2nd molars > Maxillary incisors.
• Criteria: Dean’s Index:
 0= NORMAL - smooth enamel surface, glossy, pale-creamy white color.
 1= QUESTIONABLE - slight aberrations in translucency of enamel, few
 white flecks.
 2= VERY MILD - small, opaque, paper-white areas scattered irregularly.
 3= MILD - white opacities >25% but <50%.
 4= MODERATE - marked wear, brown staining.
 5= SEVERE - marked hypoplasia. Pitted or worn areas, widespread brown stains.
 8= EXCLUDED
 9= NOT RECORDED
Community Periodontal Index (CPI): (boxes 54 - 59)
The scoring criteria:
 0 - Healthy
 1 - Bleeding observed directly or by using
mouth mirror after probing
 2 - calculus detected during probing but all of
the black band on the probe is visible.
 3 - pocket 4- 5 mm (gingival margin within the
black on the probe)
 4 - pocket 6mm or more (black band on the
probe not visible)
 X- Excluded sextant (less than two teeth
present)
 9 Not recorded
Loss of attachment:
 0 - Loss of attachment 0-3mm (CEJ not visible
and CPI score 0-3)
 1- Loss of attachment 4-5mm (CEJ within the
black band)
 2- Loss of attachment 6-8mm (CEJ between the
upped limit of the black band and 8.5mm ring)
 3 -Loss of attachment 9-11mm(CEJ between
the 8.5mm & 11.5mm rings)
 4 -Loss attachment 12mm /more (CEJ beyond
the 11.5 mm rings)
 X-exluded sextant (less than two teeth present)
 9 - Not recorded (CEJ neither visible nor
detectable
Community Periodontal Index (CPI): (boxes 54 - 59)
LOSS OF ATTACHMEN T BOXES(60 - 65)
Dentition status and treatment need: (boxes 66-161)
• Examination for dental caries - plane mouth mirror.
• Use of radiography for detection of proximal caries is not
recommended impractical in most filed situations.
• Examiners should adopt a systematic approach.
• Proceed in orderly manner from one tooth to adjacent
tooth or tooth space.
• A tooth should be considered present in the mouth
when any part of it is visible.
• If a permanent & primary tooth occupy the same space,
the status of permanent tooth should be recorded.
Dentition status and treatment need: (boxes 66-161)
• An entry must be made in every box pertaining to the coronal & root
status of a tooth.
• In children, root status is not assessed, so the corresponding boxes have
been omitted.
Dentition status and treatment need: (boxes 66-161)
0(A) - Sound crown
 No evidence of
treated/untreated
caries
 Early stages of caries
 White /chalky spots
 Stained enamel pits
&fissures
 Dark, shiny,hard,pitted
areas of enamel
Sound root: when it is
exposed and showed no
evidence of treated
clinical caries.
1(B)Decayed crown
 Undermind enamel
 Detectable softened
floor
 If carious lesion on root,
doesn't involve crown,it
should be recorded as
root caries,temporary
filling.
Decayed root: If the root
caries is discrete from the
crown and will require a
separate treatment, it
should be recorded as root'
caries.
2 (C) Filled crown, with
decay:
A crown that has
one/more permanent
restorations & one/more
ares are decayed
Filled root, with decay:
A root is considered
filled, with decay, when it
has one or more
permanent restorations
and
one or more areas that
are decayed.
Dentition status and treatment need: (boxes 66-161)
3(D)Filled crown with no
caries:
A crown that has one/more
permanent restorations are
present & there is no caries
anywhere.
Filled root, with no
decay:
A root is considered filled,
without decay,
when one or more
permanent restorations
are present and there is no
caries anywhere
on the root.
4(E)Missing tooth,due to
caries:
Permanent/primary teeth
extracted because of
caries.Recorded under
coronal status
5(-) Permanent tooth
missing due to any other
reason:
Absent congenitally
extracted for orthodontic
reasons, periodontal
disease,trauma etc
6 (F) Fissure sealant:
A fissure sealant has been
placed on occlusal surface
7(G) Fixed dental
prosthesis
abutment,crown/veneer
8(-) Unerupted tooth:
Teeth scored as Unerupted
are excluded from all
calculations concerning
caries.
Unexposed root - 8
9(-)Not Recorded:
Used for an erupted
permanent tooth that
cannot be examined
For any reason such as
orthodontic bands,severe
Hypoplasia,calculus etc
Prosthetic need: (boxes 164 and
165)
0- No prosthesis needed.
1- Need for one-unit prosthesis
(one tooth replacement).
2- Need for multi-unit prosthesis
(more than one tooth
replacement)
3- Need for a combination of one-
and /or multi-unit prosthesis.
4- Need for full
prosthesis(replacement of all
teeth).
5- Not recorded.
Prosthetic status : (boxes 162 and
163)
The presence of prostheses should
be recorded for each jaw (box 162,
upper jaw; box 163, lower jaw).
The following codes are provided for
this:
0- No prosthesis.
1 - Bridge.
2- More than one bridge.
3- Partial denture.
4- Both bridge(s) and partial
denture(s)
5- Full removable denture.
9- Not recorded.
Dentofacial anomalies : (boxes 166-176)
 The number of missing teeth in the upper and lower arches should be
recorded in boxes 166 and 167 of the assessment form.
 Crowding in the incisal segments (box 168)
Crowding in the incisal segments is recorded as follows:
0- No crowding.
1- One segment crowded.
2- Two segments crowded.
 Spacing in the incisal segments (box 169)
Spacing in the incisal segments is recorded as follows:
0- No spacing.
1- One segment spaced.
2- Two segments spaced.
Dentofacial anomalies : (boxes 166-176)
 Diastema (box 170)
 Largest anterior maxillary irregularity (box 171)
 Largest anterior mandibular irregularity (box 172)
 Anterior maxillary overjet (box 173)
 Anterior mandibular overjet (box 174)
 Vertical anterior openbite (box 175)
 Antero-posterior molar relation (box 176)
The right and left sides are assessed with the teeth in occlusion and only the
largest deviation from the normal relation is recorded. The following codes
are used:
0-Normal.
1 -Half cusp. The lower first molar is half a cusp mesial or distal to its normal
relation.
2 -Full cusp. The lower first molar is one cusp or more mesial or distal to its
normal relation.
Need for immediate care and referral: (boxes 177-180)
It is the responsibility of the examiner or team leader to ensure that referral to an
appropriate care facility is made, if needed.
Examples of conditions that require immediate attention include
periapical abscess and acute necrotizing ulcerative gingivitis.
 Gross caries and chronic alveolar abscesses may also be recorded in box 178.
 Three boxes are provided for the recording of the presence (code 1) of the
following condition:
 A life threatening condition (oral cancer or precancerous lesion) or other severe
condition with clear oral manifestation (box 177);
 pain or infection that needs immediate relief (box l78);
 Other conditions, specify (box 179).
 If the subject is referred for care, a "1" should be recorded in (box 180)
Space is provided at the bottom of the
assessment form for the examiner/recorder to
note, for his or her own reference, any
additional information that might be pertinent
to the subject being examined.
 Oral Health Surveys, Basic Methods, 4th Edition ,World Health Organization , 1997.
 Oral Health Surveys, Basic Methods, 5th Edition , World Health Organization, 2013.
https://apps.who.int/iris/bitstream/handle/10665/97035/9789241548649_eng.pdf?sequence=1
 Soben Peter . Essentials of Public Health Dentistry, 5th edition
 Hiremath SS, Textbook of Public Health Dentistry, 3rd edition
Marya CM. A textbook of public health dentistry. JP Medical Ltd; 2011 Mar 14.
References
T h a n k y o u

Weitere ähnliche Inhalte

Was ist angesagt?

Dental auxillaries
Dental auxillariesDental auxillaries
Dental auxillaries
Avinash Raj
 
Oral habits - pedodontics
Oral habits - pedodonticsOral habits - pedodontics
Oral habits - pedodontics
Dr. Elvis David
 

Was ist angesagt? (20)

Critical evaluation of dental indices
Critical evaluation of dental indicesCritical evaluation of dental indices
Critical evaluation of dental indices
 
Periodontal Case History
Periodontal Case HistoryPeriodontal Case History
Periodontal Case History
 
Dental indices
Dental indicesDental indices
Dental indices
 
Periodontal probing and techniques
Periodontal probing and techniquesPeriodontal probing and techniques
Periodontal probing and techniques
 
Dental Calculus
Dental Calculus Dental Calculus
Dental Calculus
 
Cariogram
CariogramCariogram
Cariogram
 
Dental home
Dental homeDental home
Dental home
 
Space maintainers
Space maintainers Space maintainers
Space maintainers
 
Russell’s Periodontal Index & CPITN Probe
Russell’s Periodontal Index & CPITN ProbeRussell’s Periodontal Index & CPITN Probe
Russell’s Periodontal Index & CPITN Probe
 
periodontal indices
periodontal indices  periodontal indices
periodontal indices
 
Peridontal pocket
Peridontal pocketPeridontal pocket
Peridontal pocket
 
Trauma from occlusion
Trauma from occlusionTrauma from occlusion
Trauma from occlusion
 
Finance in dental care
Finance in dental careFinance in dental care
Finance in dental care
 
Gingival recession classifications
Gingival recession classifications Gingival recession classifications
Gingival recession classifications
 
Dental auxillaries
Dental auxillariesDental auxillaries
Dental auxillaries
 
Oral habits - pedodontics
Oral habits - pedodonticsOral habits - pedodontics
Oral habits - pedodontics
 
ATRAUMATIC RESTORATIVE TREATMENT (ART)
ATRAUMATIC RESTORATIVE TREATMENT (ART) ATRAUMATIC RESTORATIVE TREATMENT (ART)
ATRAUMATIC RESTORATIVE TREATMENT (ART)
 
Vipeholm upload.pptx
Vipeholm upload.pptxVipeholm upload.pptx
Vipeholm upload.pptx
 
Pediatric endodontics
Pediatric endodonticsPediatric endodontics
Pediatric endodontics
 
Pit and fissure sealants
Pit and fissure sealantsPit and fissure sealants
Pit and fissure sealants
 

Ähnlich wie Survey procedures in dentistry

Project Monitorig and Evaluation_Data Collection Methods.pptx
Project Monitorig and Evaluation_Data Collection Methods.pptxProject Monitorig and Evaluation_Data Collection Methods.pptx
Project Monitorig and Evaluation_Data Collection Methods.pptx
Excellence Foundation for South Sudan
 
Seminar on survey methods
Seminar on survey methodsSeminar on survey methods
Seminar on survey methods
Sachin Shekde
 
gatheringofdata2-150513082553-lva1-app6892.pdf
gatheringofdata2-150513082553-lva1-app6892.pdfgatheringofdata2-150513082553-lva1-app6892.pdf
gatheringofdata2-150513082553-lva1-app6892.pdf
MaIvyBrillante
 
12 surveys and_questionnaires_revision_2009
12 surveys and_questionnaires_revision_200912 surveys and_questionnaires_revision_2009
12 surveys and_questionnaires_revision_2009
syazalinah
 
Atoma Research Methodology presentation .pdf
Atoma Research Methodology presentation .pdfAtoma Research Methodology presentation .pdf
Atoma Research Methodology presentation .pdf
MitikuTeka1
 

Ähnlich wie Survey procedures in dentistry (20)

Project Monitorig and Evaluation_Data Collection Methods.pptx
Project Monitorig and Evaluation_Data Collection Methods.pptxProject Monitorig and Evaluation_Data Collection Methods.pptx
Project Monitorig and Evaluation_Data Collection Methods.pptx
 
SURVEY RESEARCH- Advance Research Methodology
SURVEY RESEARCH- Advance Research MethodologySURVEY RESEARCH- Advance Research Methodology
SURVEY RESEARCH- Advance Research Methodology
 
SURVEY_RESEARCH.ppt
SURVEY_RESEARCH.pptSURVEY_RESEARCH.ppt
SURVEY_RESEARCH.ppt
 
Survey Surveillance Screening
Survey Surveillance Screening Survey Surveillance Screening
Survey Surveillance Screening
 
survey method.ppt community medicine psm
survey method.ppt community medicine psmsurvey method.ppt community medicine psm
survey method.ppt community medicine psm
 
Research methodology unit four
Research methodology   unit fourResearch methodology   unit four
Research methodology unit four
 
Research methodology – unit 4
Research methodology – unit 4Research methodology – unit 4
Research methodology – unit 4
 
Seminar on survey methods
Seminar on survey methodsSeminar on survey methods
Seminar on survey methods
 
Rerearch design
Rerearch designRerearch design
Rerearch design
 
DATA GATHERING
DATA GATHERINGDATA GATHERING
DATA GATHERING
 
gatheringofdata2-150513082553-lva1-app6892.pdf
gatheringofdata2-150513082553-lva1-app6892.pdfgatheringofdata2-150513082553-lva1-app6892.pdf
gatheringofdata2-150513082553-lva1-app6892.pdf
 
Periodontal Research: Basics and beyond – Part II (Ethical issues, sampling, ...
Periodontal Research: Basics and beyond – Part II (Ethical issues, sampling, ...Periodontal Research: Basics and beyond – Part II (Ethical issues, sampling, ...
Periodontal Research: Basics and beyond – Part II (Ethical issues, sampling, ...
 
12 surveys and_questionnaires_revision_2009
12 surveys and_questionnaires_revision_200912 surveys and_questionnaires_revision_2009
12 surveys and_questionnaires_revision_2009
 
Specific quantitative.pptx
Specific quantitative.pptxSpecific quantitative.pptx
Specific quantitative.pptx
 
SurveyMETHOD.pptx
SurveyMETHOD.pptxSurveyMETHOD.pptx
SurveyMETHOD.pptx
 
Research Methods
Research Methods Research Methods
Research Methods
 
GROUP 20.pptx
GROUP 20.pptxGROUP 20.pptx
GROUP 20.pptx
 
Atoma Research Methodology presentation .pdf
Atoma Research Methodology presentation .pdfAtoma Research Methodology presentation .pdf
Atoma Research Methodology presentation .pdf
 
Survey
SurveySurvey
Survey
 
Sampling
Sampling Sampling
Sampling
 

Kürzlich hochgeladen

1029-Danh muc Sach Giao Khoa khoi 6.pdf
1029-Danh muc Sach Giao Khoa khoi  6.pdf1029-Danh muc Sach Giao Khoa khoi  6.pdf
1029-Danh muc Sach Giao Khoa khoi 6.pdf
QucHHunhnh
 
Activity 01 - Artificial Culture (1).pdf
Activity 01 - Artificial Culture (1).pdfActivity 01 - Artificial Culture (1).pdf
Activity 01 - Artificial Culture (1).pdf
ciinovamais
 
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in DelhiRussian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
kauryashika82
 
Beyond the EU: DORA and NIS 2 Directive's Global Impact
Beyond the EU: DORA and NIS 2 Directive's Global ImpactBeyond the EU: DORA and NIS 2 Directive's Global Impact
Beyond the EU: DORA and NIS 2 Directive's Global Impact
PECB
 

Kürzlich hochgeladen (20)

Sociology 101 Demonstration of Learning Exhibit
Sociology 101 Demonstration of Learning ExhibitSociology 101 Demonstration of Learning Exhibit
Sociology 101 Demonstration of Learning Exhibit
 
Basic Civil Engineering first year Notes- Chapter 4 Building.pptx
Basic Civil Engineering first year Notes- Chapter 4 Building.pptxBasic Civil Engineering first year Notes- Chapter 4 Building.pptx
Basic Civil Engineering first year Notes- Chapter 4 Building.pptx
 
TỔNG ÔN TẬP THI VÀO LỚP 10 MÔN TIẾNG ANH NĂM HỌC 2023 - 2024 CÓ ĐÁP ÁN (NGỮ Â...
TỔNG ÔN TẬP THI VÀO LỚP 10 MÔN TIẾNG ANH NĂM HỌC 2023 - 2024 CÓ ĐÁP ÁN (NGỮ Â...TỔNG ÔN TẬP THI VÀO LỚP 10 MÔN TIẾNG ANH NĂM HỌC 2023 - 2024 CÓ ĐÁP ÁN (NGỮ Â...
TỔNG ÔN TẬP THI VÀO LỚP 10 MÔN TIẾNG ANH NĂM HỌC 2023 - 2024 CÓ ĐÁP ÁN (NGỮ Â...
 
Mehran University Newsletter Vol-X, Issue-I, 2024
Mehran University Newsletter Vol-X, Issue-I, 2024Mehran University Newsletter Vol-X, Issue-I, 2024
Mehran University Newsletter Vol-X, Issue-I, 2024
 
PROCESS RECORDING FORMAT.docx
PROCESS      RECORDING        FORMAT.docxPROCESS      RECORDING        FORMAT.docx
PROCESS RECORDING FORMAT.docx
 
Role Of Transgenic Animal In Target Validation-1.pptx
Role Of Transgenic Animal In Target Validation-1.pptxRole Of Transgenic Animal In Target Validation-1.pptx
Role Of Transgenic Animal In Target Validation-1.pptx
 
ICT role in 21st century education and it's challenges.
ICT role in 21st century education and it's challenges.ICT role in 21st century education and it's challenges.
ICT role in 21st century education and it's challenges.
 
Micro-Scholarship, What it is, How can it help me.pdf
Micro-Scholarship, What it is, How can it help me.pdfMicro-Scholarship, What it is, How can it help me.pdf
Micro-Scholarship, What it is, How can it help me.pdf
 
General Principles of Intellectual Property: Concepts of Intellectual Proper...
General Principles of Intellectual Property: Concepts of Intellectual  Proper...General Principles of Intellectual Property: Concepts of Intellectual  Proper...
General Principles of Intellectual Property: Concepts of Intellectual Proper...
 
Mixin Classes in Odoo 17 How to Extend Models Using Mixin Classes
Mixin Classes in Odoo 17  How to Extend Models Using Mixin ClassesMixin Classes in Odoo 17  How to Extend Models Using Mixin Classes
Mixin Classes in Odoo 17 How to Extend Models Using Mixin Classes
 
1029-Danh muc Sach Giao Khoa khoi 6.pdf
1029-Danh muc Sach Giao Khoa khoi  6.pdf1029-Danh muc Sach Giao Khoa khoi  6.pdf
1029-Danh muc Sach Giao Khoa khoi 6.pdf
 
Activity 01 - Artificial Culture (1).pdf
Activity 01 - Artificial Culture (1).pdfActivity 01 - Artificial Culture (1).pdf
Activity 01 - Artificial Culture (1).pdf
 
ComPTIA Overview | Comptia Security+ Book SY0-701
ComPTIA Overview | Comptia Security+ Book SY0-701ComPTIA Overview | Comptia Security+ Book SY0-701
ComPTIA Overview | Comptia Security+ Book SY0-701
 
Holdier Curriculum Vitae (April 2024).pdf
Holdier Curriculum Vitae (April 2024).pdfHoldier Curriculum Vitae (April 2024).pdf
Holdier Curriculum Vitae (April 2024).pdf
 
Measures of Central Tendency: Mean, Median and Mode
Measures of Central Tendency: Mean, Median and ModeMeasures of Central Tendency: Mean, Median and Mode
Measures of Central Tendency: Mean, Median and Mode
 
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in DelhiRussian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
 
Beyond the EU: DORA and NIS 2 Directive's Global Impact
Beyond the EU: DORA and NIS 2 Directive's Global ImpactBeyond the EU: DORA and NIS 2 Directive's Global Impact
Beyond the EU: DORA and NIS 2 Directive's Global Impact
 
Web & Social Media Analytics Previous Year Question Paper.pdf
Web & Social Media Analytics Previous Year Question Paper.pdfWeb & Social Media Analytics Previous Year Question Paper.pdf
Web & Social Media Analytics Previous Year Question Paper.pdf
 
Food Chain and Food Web (Ecosystem) EVS, B. Pharmacy 1st Year, Sem-II
Food Chain and Food Web (Ecosystem) EVS, B. Pharmacy 1st Year, Sem-IIFood Chain and Food Web (Ecosystem) EVS, B. Pharmacy 1st Year, Sem-II
Food Chain and Food Web (Ecosystem) EVS, B. Pharmacy 1st Year, Sem-II
 
Unit-IV; Professional Sales Representative (PSR).pptx
Unit-IV; Professional Sales Representative (PSR).pptxUnit-IV; Professional Sales Representative (PSR).pptx
Unit-IV; Professional Sales Representative (PSR).pptx
 

Survey procedures in dentistry

  • 1. S U R V E Y PROCEDURES IN D E N T I S T R Y B.Deepthi ragasree BDS (final year)
  • 2. Survey is a non-experimental type of research that attempts to gather information about the status quo for a large number of people by describing present conditions without directly analyzing their causes. Definition
  • 3. Types of survey Analytical surveyDescriptive survey Longitudinal survey Cross sectional survey Longitudinal survey Cross sectional survey
  • 4. Monitoring trends in oral health and disease: When national surveys are repeated periodically under general similar conditions, broad oral health trends over time can be estimated, provided the sampling design so permits.The WHO's pathfinder survey protocol when repeated periodically can assess trends in health and disease and it is assumed that the results are valid enough to support national policy decisions. Policy development: Survey data can be used to establish oral health strategies. Scotland has successfully used survey data to develop its oral health policy. A number of American States switched their primary preventive focus from fluoride mouth-rinsing to sealant application after statewide surveys showed most carious lesions to be in pits and fissur Program evaluation: Survey data are often used to evaluate programs though the principle that association does not show cause-and-effect needs to be remembered.The success of particular programs can only be inferred from survey data, though the more localized the survey and the program, then the more plausible is the inference.
  • 5. Assessment of dental needs: Although surveys can be used for assessment of needs, there is a clear gap between the criteria used in surveys and those applied for individual patient care. e.g. criteria for caries in surveys usually are based on cavitation, but dentists generally intervene at an earlier stage in the carious process. Providing visibility to dental issues: The visibility that oral health acquires through the mere existence of data from a national survey may be the most important of all uses of survey data.
  • 6. METHODS OF DATA COLLECTION  Health interview survey: (face-to-face survey) It is an invaluable method of measuring subjective phenomena, such as perceived morbidity, disability and impairment; opinions, beliefs and attitudes and some behavioral characteristics.  Health examination survey: This survey is carried out by teams consisting of doctors and auxiliaries. Disadvantages: 1)It is expensive and cannot be carried out on an extensive scale. 2)The method also requires consideration of providing treatment to people found suffering from certain disease.
  • 7. METHODS OF DATA COLLECTION  Health records survey : It involves the collection of data from health service records. This is obviously the most economical method of collecting data. Disadvantages: a. The data obtained is not population-based. b. Reliability is open to question. c. Lack of uniform procedures and standardization in the recording of data.  Questionnaire survey: The use of questionnaires and interviews is a standard method of data collection in clinical,epidemiological, psychosocial and demographic research. It is used for measuring subjective phenomena.
  • 8. METHODS OF DATA COLLECTION - QUESTIONARIE SURVEY Types: 1) Mailed questionaries 2) Telephone questionaries 3)Face-to-face questionaries ADVANTAGES: • Simple • Economical • Standardization - Written instructions reduce biases from differences in administration. • Anonymity -Privacy encourages candid and honest responses to sensitive questions. Disadvantages: A certain level of education and skill is expected from the respondents. There is usually a high rate of nonresponse.
  • 9. Open ended questions- Free response Closed ended questions- fixed alternative The subject answers in his own words. This may produce difficulties when interpreting the responses, e.g. How many cigarettes do you smoke per day? They are answered by choosing from a number of fixed alternative response. Eg: How many cigarettes do you smoke per day? a. Upto -10 b. 10-20 c. 20 -30 d. More than 30 The 2 types of scales most commonly used are : 1)Likert Scale: (Summative) 2)Guttman scale: (Cumulative)(Scalogram) ????
  • 10. Likert Scale: (Summative) Commonly used to quantify attitudes and behavior. Respondents are asked to select a response that best represents the rank or degree of their answer. E.g. The respondent may be asked to indicate whether he strongly agrees, agrees, neither, disagrees or strongly disagrees with the statement. Each response is assigned a number. The points of each item is added. Guttman scale: (Cumulative) (Scalogram) These contain a series of statements that express increasing intensity of a characteristic. The respondent is asked to agree or disagree with each statement. The respondents score is the total number of items with which he agrees or disagrees.
  • 11. Establishing the objective Designing the investigation Selecting the sample Conducting the examinations Analyzing the data Drawing the conclusions Publishing the results 1 3 2 4 5 6 7
  • 12. 1) Establishing the objectives:  The objectives can either be stated in the form of a hypothesis which is to be tested, or, the objective may be stated by describing what is to be measured.  The starting point of a study is frequently an expression of a null hypothesis, which states that there is no difference between the groups. Eg: There is no difference in the periodontal status of males and females aged 35-44 years in Mangalore. The objective of the study is then to test this hypothesis Eg: To determine the prevalence of dental caries among 12 year old school children in Mangalore.
  • 13. 2) Designing the investigation: Survey protocol: It is important to prepare a written protocol for the survey, which should contain,  Main objective and purpose of the survey,  A description of the type of information to be collected and of the methods to be used.  A description of the sampling methods to be used.  Personnel and physical arrangements.  Statistical methods to be used in analyzing the data.  A provisional budget.  A provisional time-table of main activities and responsible staff.
  • 14. 1 ) Obtaining approval from authorities: Permission to examine population groups must usually be obtained from a local, regional or national authority. E.g. If school populations are to be examined, schoolauthorities and the parents should be approached for obtaining permission. 2) Emergency care and referral: All survey teams should be equipped for and ready to provide emergency care if required. It is also the responsibility of the examiner to ensure an appropriate care facility is made. 3 ) Budgeting: A budget for the survey should be prepared which should include all the resources required to carry out the survey.
  • 15. 3) Selecting the sample: Sample Collect information from these people to find answers to your Research questions Study population: Sampling units Make an estimate of their prevalencein the study population from sample findings Select a few sampling units from the study population Reference or parent population
  • 16. METHODS OF SAMPLING : 1) Simple random sampling  It is a technique whereby each sampling unit has the same probability of being selected.  Every item in population has an equal chance of being included. Basic procedure: • Prepare a sampling frame • Decide on the size ofthe sample • Select the required number of unit
  • 17. 1) Simple random sampling LOTTERY METHOD TABLE OF RANDOM NUMBERS  Here the population units are numbered on separate slips of paper of identical size and shape  These slips are then shuffled and blind fold selection of the number of slips is made to constitute the desired sample size Random numbers are haphazard collection of certain numbers, arranged in a cunning manner to eliminate personal selection or the unconscious bias in taking out the sample
  • 18.  The first unit is chosen at random and then, other units are chosen in a systematic way.  E'.g. Every third patient visiting the dentist. (2) Systematic sampling
  • 19. (3) Stratified sampling The population is first divided into subgroups or strata according to certain common characteristics. Then random or systematic sampling is performed independently in each stratum:  Stratified random sampling  Stratified systematic sampling
  • 20. (4) Cluster sampling A simple random sampling is selected, not of individual subjects, but of groups or clusters of individuals. The sampling units are clusters and the sampling frame is a list of these clusters
  • 21. (5) Multiphase sampling This is used to take basic data from a large sample and details from a subsample.  It is a sub-sampling within groups chosen as cluster samples. The first stage is to select the groups or clusters.  Then sub-samples are taken in as many subsequent stages as necessary to obtain the desired sample size  Eg : Nutritional status of the country (6)Multistage sampling
  • 22. (7) Panels They are useful for studying trends. A sample is randomly selected and then data are collected from the sample on several occasions. E.g. Every person is interviewed every 6 months.  A small sample is tested in order to answer certain questions about the population.  If the questions are not answered, the number of subjects or units in the sample is increased gradually until the conclusions may be drawn. (8) Sequential sampling
  • 23.  The examination should be as automatic as possible to obviate excessive intrusion of subjective thought. Therefore it should be performed quickly.  The object of epidemiological surveys is to examine subjects in fairly large numbers. Excessive time spent on each individual necessitates a reduction in the number of individuals seen. 4.Conducting the Examination : BASIC ORAL HEALTH EXAMINATION 5 - 10 minutes 15 - 20 minutes
  • 24. • Plane mouth mirrors - 30 per examiner • Periodontal probes - 30 per examiner • Several pair of tweezers • Containers and concentrated sterilizing solution. • A wash basin • Cloth or paper hand towels • Gauze. Instruments & supplies Infection control : Current national recommendations and standards should be followed for • Infection control • Waste disposal • Disposable masks, gloves, protective eyewear recommended.
  • 25. CHAIR: Preferable with a head rest. Most comfortable situation is for the subject to be on a table/bench, and examiner to sit behind the subject’s head. ILLUMINATION: A separate unit lamp attached to head of the examiner fibre optic light source. CLEANING: Method to remove loose debris where necessary. ASSESSMENT FORMS: Adequate supply. Avoidance of crowding and noise around the examiner. RECORDER: Live or tape for receiving information called by the examiner. ORGANIZING CLERK: To maintain constant flow of subjects and to enter general descriptive info on forms. EXAMINATION AREA :
  • 26. It is used to calculate intra and inter examiner reproducibility.  It is an index which compares the agreement against that which might be expected by chance.  Kappa can be thought of as the chance-corrected proportional agreement, and possible values range from + 1 (perfect agreement) via 0 (no agreement above that expected by chance) to -1 (complete disagreement). KAPPA STATISTIC: KAPPA VALUE INTERPRETATION 1 Total agreement > 0.8 Good agreement 0.6 - 0.8 Substantial agreement 0.4 - 0.6 Moderate agreement
  • 27. CLASSIFICATION OF TYPES OF INSPECTION AND EXAMINATION : TYPE 1: Complete examination using mouth mirror ,explorer, good illumination, full mouth radiographs, & additional diagnostic methods (pulp testing, study models, transillumination etc.) TYPE 2: Limited examination, using mouth mirror and explorer, bitewing radiographs. Periapical radiographs if indicated. TYPE 3: Inspection using mouth mirror ,explorer & good illumination. TYPE 4: Screening procedure - tongue depressor, available illumination.
  • 28. (5)ANALYZING DATA : Once the examination procedures of a survey have been completed, the work of assembling the material and interpreting it begins. 01 02 The analysis of findings has two components: Data processing (statistical analysis) Interpretation of result
  • 29. (6) Drawing the conclusions and publishing the report: The conclusions are specifically related to the investigation that has been carried out and The final step in a survey procedure should be the construction of a report with or without a set of recommendations. Clearness and simplicity should be sought.
  • 30. 1. Statement of the purposes of the survey. 2. Material and methods. A) Description of area and population served. B) Types of information collected C) Methods of collecting data D) Sampling method E) Examiner personnel and equipment F) Statistical analysis and computational procedure G) Cost analysis H) Reliability and reproducibility of results. 3. Results: They should be tabulated and illustrated appropriately. 4. Discussion and conclusions: The investigations, its findings and its conclusions are discussed. 5. Summary.
  • 31. ORAL HEALTH SURVEYS PATH FINDER SURVEYS The special factors associated with the most common oral diseases which have enabled a practical economic survey sampling methodology to be defined, called the "pathfinder method". The "pathfinder method" is a stratified cluster sampling technique, which aims to include the most important population subgroups likely to have differing disease levels.
  • 32. PATH FINDER NATIONAL PATH FINDER SURVEY PILOT SURVEY
  • 33. PILOT SURVEY NATIONAL PATH FINDER SURVEY  Only the most important subgroups in the population.  One or two index ages  12 years and one other age group.  Provides the maximum amount of data needed to commence planning  Incorporates sufficient examination sites to cover all important subgroups of the population  Atleast three of the index age groups.  Suitable for collection of data for planning purposes & monitoring of oral health programmes in all countries regardless of the level of disease, availability of resources/complexity of care.
  • 35. 5 YEARS INDEX AGE GROUP Children should be examined between 5th - 6th birthdays. • Caries levels in Primary dentition • Exhibit changes over a short span of time than in permanent dentition at other index ages • In some countries, 5 years is also the age at which children begin primary school.
  • 36. 12 YEARS INDEX AGE GROUP • Children leave primary school. • Last age at which a reliable sample may be obtained easily through school system. • All permanent teeth (except 3rd molars) are likely to have erupted. • Chosen as “global indicator age group for international comparisons and surveillance of disease trends”
  • 37. 15 YEARS INDEX AGE GROUP • Permanent teeth - exposed to oral environment for 3-9 years. • Assessment of caries prevalence and periodontal disease in adolescents. (15-19yrs) • In countries where it is difficult to obtain a reliable sample of this age group, it is customary to examine individuals in two-three areas
  • 38. 35 - 44 YEARS INDEX AGE GROUP Standard age group for surveillance of oral health conditions in adults. • Planners & decision-makers can assess the full effect of dental caries, level of severe periodontal involvement, & general effects of oral health care provided. • Samples can be derived from organized groups - office, factory workers etc. • Care must be taken to avoid obvious selection bias.
  • 39. 65 - 74 YEARS INDEX AGE GROUP • Has become important with the changes in age distribution of populations and the worldwide increase in lifespan. • Estimate the manifestation of oral disease from a life course perspective. • Data needed : planning appropriate interventions for older people and for assessment of the ultimate effect of oral health programmes • Sampling - care should be taken to sample adequately both house bound & active members of this age group.
  • 40. NUMBER OF SUBJECTS The number of subjects in each index age group to be examined ranges from a minimum of 25 to 50 for each cluster or sampling site, depending on the expected prevalence and severity of oral diseases. If this cluster distribution is applied to four index ages in the population under study, the total sample is 4 x 300 = 1200. Permits the identification of differences - between urban and rural group. - between socioeconomic groups. - areas where prevalence is much higher or lower.
  • 41. THE WHO ORAL HEALTH ASSESSMENT FORM (1997) The WH O Oral Health Assessment Form 1997 is a universally accepted and used recording methodology for oral health surveys. STANDARD CODES  If some of the oral health assessments are not carried out, or are not applicable to the age group being examined, the unused sections of the form should be canceled with a diagonal line, or by using code 9.  The forms are designed to facilitate computer processing of the result.  The two-digit numbers above or below some of the boxes indicate specific teeth, according to the system used by the International Dental Federation (FDI).
  • 42. 1. Survey identification information 2. General information 3. Extra-oral examination 4. Temporomandibular joint assessment 5. Oral mucosa 6. Enamel opacities/hypoplasia 7. Dental fluorosis 8. CPI (periodontal status, formerly called Community Periodontal Index of Treatment Needs or CPITN) 9. Loss of attachment 10.Dentition status and treatment need 11 .Prosthetic status 12.Prosthetic need 13.Dentofacial anomalies 14.Need for immediate care and referral 15. Notes ORAL HEALTH ASSESSMENT FORM SHOULD INCLUDE
  • 43. ORAL HEALTH ASSESSMENT FORM - 1997
  • 44. ORAL HEALTH ASSESSMENT FORM - 1997
  • 45. ORAL HEALTH ASSESSMENT FORM - 1997
  • 46. ORAL HEALTH ASSESSMENT FORM - 1997
  • 47. • During planning - a list of examination sites & of the examiners involved in the study should be made & a code assigned to each examiner. • The coding list should also include the numeric codes to be used for other relevant information such as the fluoride content of drinking water or use of fluoride supplements. Identification and general information sections of the form
  • 48. • Country in which the survey is carried out. • Should not be filled by the investigator. BOX 1 - 4 WHO code for the country
  • 49. • Should be recorded at the time of examination. • Enables an investigator to refer back to examinations held on any particular day which may need to be reviewed or checked. BOX 5 - 8 Essential info: year, month, date
  • 50. • Each subject examined should be given an identification number. • Should always have the same number of digits as the total number of subjects. • e.g:1200 subjects . . . first subject - 0001. • If possible, ID no.s be entered before commencing the examinations. BOX 11- 14 Identification number
  • 51. • If more than one examiner is participating in the survey. • Each examiner should be assigned a specific code. BOX 15 EXAMINAR
  • 52. • If the subject will be re-examined to assess reproducibility, original examination is scored “1” & any subsequent examinations are coded “2”, “3”, “4” etc. • For all subjects for whom duplicate examinations are made, data from the 1st examination only are included in the survey analysis. BOX 16 Original / Duplicate examination
  • 53. • In Block letters. • In some countries, identification of survey subjects by name is not permitted, in such case - space should be left blank. NAME
  • 54. • Year, month and day of birth • For cross-checking purposes. • age at last birthday. • 6 years is coded as “06”. • when age is not known - ‘estimated age’: eruption status, major life events etc. • Manner of estimation should be reported. Date of birth (17 - 20) Age (21 - 22) SEX - 23 • Must always be recorded, because it is not always possible to tell a person’s sex from the name alone. • 1 = Male, 2 = Female.
  • 55. • In different countries, ethnic groups may be identified in different ways, by area or country of origin, race, color, language, religion or tribal membership. • local health & education authorities should be consulted. • May be obtained from govt. agencies or school administrative data at the time of sample selection. Other Group: To identify different subpopulation groups. BOX 24 Ethnic group
  • 56. A coding system should be devised according to local usage to identify different occupations and appropriate code entered. BOX 25 OCCUPATION BOX 26 - 27 Geographical location: • To record the site where examination is being conducted. • 01 - 98 • ’99’ entered if this information is not recorded. • Community information is useful for health administrators for planning or revising programs or strategies.
  • 57. • General information about the local environmental conditions & availability of services at each site. 1 Urban site 2 Periurban area: areas surrounding major towns with very few health facilities & limited access. 3 Rural area or small village. BOX 28 LOCATION
  • 58. • use of tobacco, SES, physical environment, levels of fluoride etc. • Frequency of sugar intake. BOX 29 - 30 OTHER DATA
  • 59. Examiners should use their judgement in matter. The following codes are used ; 0 - No contraindication 1 - Contraindication BOX 31 Contraindication to examination
  • 60. In order, to ensure that all conditions are detected and diagnosed, it is recommended that the clinical examination follows the order of the assessment form. CLINICAL ASSESSMENT
  • 62. The extra-oral examination should be performed in the following sequence :  a) general overview of exposed skin areas-(head, neck, limbs)  b) perioral skin areas (nose, cheeks, chin)  c) lymph nodes (head, neck)  d) cutaneous parts of upper & lower lips  e) vermilion border and commissures  f) temporomandibular joint & Parotid gland region The following codes and criteria are used;  0 - Normal extra-oral appearance,  1 - Ulceration, sores, eriosions, fissures  2 -Ulceration, sores, erosions, fissures, nose, cheeks, chin.  3 -Ulceration, sores, erosions, fissures ,commissures  4 - Ulceration, sores, erosions, fissures ,vermilion border.  5 - Cancrum oris.  6 -Abnormalities of upper and lower lips (e.g., clefts)  7 -Enlarged lymph nodes - head, neck  8 -Other swelling of the face & jaws.  9 - Not recorded.
  • 64. Symptoms (box 33). The following codes and criteria are used; 0 - No symptoms 1 - Occurrence of clicking, pain or difficulties in opening or closing the jaw once or more per week. 9 -Not recorded. Signs (boxes 34 - 36). The following codes and criteria are used; 0 - No signs 1 - Occurrence of clicking, tenderness (on palpation) or reduced jaw mobility (opening < 30 mm). 9 - Not recorded.  Clicking (box 34) of one or both temporomandibular joints.  Tenderness (on palpation) (box 35) of the anterior temporalis and/or masseter muscles on one or both sides.  Reduced jaw mobility (box 36) - opening of < 30 mm , taken as the distance between the incisal tips of the central maxillary and mandibular incisors
  • 65. Oral mucosa: (boxes 37 - 42) The examination should be thorough and systematic and be performed in the following sequence : a) Labial mucosa and labial sulci (upper and lower) b) Labial part of the commissures and buccal mucosa (rightand left). c) Tongue (dorsal and ventral surfaces, margins) d) Floor of the mouth e) Hard and soft palate f) Alveolar ridges/ gingiva (upper and lower).
  • 66. The codes and criteria are : 0 - No abnormal condition 1 - Malignanttumor (oral cancer). 2 - Leukoplakia 3 - Lichenplanus 4 - Ulceration (aphthous, herpetic, traumatic) 5 - Acute necrotizing gingivitis 6 - Candidiasis 7 - Abscess. 8 - Other condition (specify if possible) 9 - Not recorded. The main location of the oral mucosal lesion(s) should be recorded in boxes 40 - 42 as follows; 0 - Vermilion border 1 - Commissures 2 - Lips 3 - Sulci 4 - Buccal mucosa 5 - Floor of the mouth 6 - Tongue 7 - Hard and/or soft palate 8 - Alveolar ridges/gingiva. 9 - Not recorded.
  • 67. Enamel opacities / hypoplasia: boxes ( 43 - 52) The codes and criteria are as follows:  0 - Normal  1 - Demarcated opacity  2 - Diffuse opacity  3 - Hypoplasia  4 - Otherdefects  5 - Demarcated and diffuse opacities  6 - Demarcated opacities and hypoplasia  7 - Diffuse opacity and hypoplasia  8 - All three conditions  9 - Not recorded
  • 68. Dental fluorosis: (box 53) Fluorotic lesions are usually B/L symmetrical.Horizontal striated pattern across the tooth. Premolars > 2nd molars > Maxillary incisors. • Criteria: Dean’s Index:  0= NORMAL - smooth enamel surface, glossy, pale-creamy white color.  1= QUESTIONABLE - slight aberrations in translucency of enamel, few  white flecks.  2= VERY MILD - small, opaque, paper-white areas scattered irregularly.  3= MILD - white opacities >25% but <50%.  4= MODERATE - marked wear, brown staining.  5= SEVERE - marked hypoplasia. Pitted or worn areas, widespread brown stains.  8= EXCLUDED  9= NOT RECORDED
  • 69. Community Periodontal Index (CPI): (boxes 54 - 59) The scoring criteria:  0 - Healthy  1 - Bleeding observed directly or by using mouth mirror after probing  2 - calculus detected during probing but all of the black band on the probe is visible.  3 - pocket 4- 5 mm (gingival margin within the black on the probe)  4 - pocket 6mm or more (black band on the probe not visible)  X- Excluded sextant (less than two teeth present)  9 Not recorded Loss of attachment:  0 - Loss of attachment 0-3mm (CEJ not visible and CPI score 0-3)  1- Loss of attachment 4-5mm (CEJ within the black band)  2- Loss of attachment 6-8mm (CEJ between the upped limit of the black band and 8.5mm ring)  3 -Loss of attachment 9-11mm(CEJ between the 8.5mm & 11.5mm rings)  4 -Loss attachment 12mm /more (CEJ beyond the 11.5 mm rings)  X-exluded sextant (less than two teeth present)  9 - Not recorded (CEJ neither visible nor detectable
  • 70. Community Periodontal Index (CPI): (boxes 54 - 59) LOSS OF ATTACHMEN T BOXES(60 - 65)
  • 71. Dentition status and treatment need: (boxes 66-161) • Examination for dental caries - plane mouth mirror. • Use of radiography for detection of proximal caries is not recommended impractical in most filed situations. • Examiners should adopt a systematic approach. • Proceed in orderly manner from one tooth to adjacent tooth or tooth space. • A tooth should be considered present in the mouth when any part of it is visible. • If a permanent & primary tooth occupy the same space, the status of permanent tooth should be recorded.
  • 72. Dentition status and treatment need: (boxes 66-161) • An entry must be made in every box pertaining to the coronal & root status of a tooth. • In children, root status is not assessed, so the corresponding boxes have been omitted.
  • 73. Dentition status and treatment need: (boxes 66-161) 0(A) - Sound crown  No evidence of treated/untreated caries  Early stages of caries  White /chalky spots  Stained enamel pits &fissures  Dark, shiny,hard,pitted areas of enamel Sound root: when it is exposed and showed no evidence of treated clinical caries. 1(B)Decayed crown  Undermind enamel  Detectable softened floor  If carious lesion on root, doesn't involve crown,it should be recorded as root caries,temporary filling. Decayed root: If the root caries is discrete from the crown and will require a separate treatment, it should be recorded as root' caries. 2 (C) Filled crown, with decay: A crown that has one/more permanent restorations & one/more ares are decayed Filled root, with decay: A root is considered filled, with decay, when it has one or more permanent restorations and one or more areas that are decayed.
  • 74. Dentition status and treatment need: (boxes 66-161) 3(D)Filled crown with no caries: A crown that has one/more permanent restorations are present & there is no caries anywhere. Filled root, with no decay: A root is considered filled, without decay, when one or more permanent restorations are present and there is no caries anywhere on the root. 4(E)Missing tooth,due to caries: Permanent/primary teeth extracted because of caries.Recorded under coronal status 5(-) Permanent tooth missing due to any other reason: Absent congenitally extracted for orthodontic reasons, periodontal disease,trauma etc 6 (F) Fissure sealant: A fissure sealant has been placed on occlusal surface 7(G) Fixed dental prosthesis abutment,crown/veneer 8(-) Unerupted tooth: Teeth scored as Unerupted are excluded from all calculations concerning caries. Unexposed root - 8 9(-)Not Recorded: Used for an erupted permanent tooth that cannot be examined For any reason such as orthodontic bands,severe Hypoplasia,calculus etc
  • 75. Prosthetic need: (boxes 164 and 165) 0- No prosthesis needed. 1- Need for one-unit prosthesis (one tooth replacement). 2- Need for multi-unit prosthesis (more than one tooth replacement) 3- Need for a combination of one- and /or multi-unit prosthesis. 4- Need for full prosthesis(replacement of all teeth). 5- Not recorded. Prosthetic status : (boxes 162 and 163) The presence of prostheses should be recorded for each jaw (box 162, upper jaw; box 163, lower jaw). The following codes are provided for this: 0- No prosthesis. 1 - Bridge. 2- More than one bridge. 3- Partial denture. 4- Both bridge(s) and partial denture(s) 5- Full removable denture. 9- Not recorded.
  • 76. Dentofacial anomalies : (boxes 166-176)  The number of missing teeth in the upper and lower arches should be recorded in boxes 166 and 167 of the assessment form.  Crowding in the incisal segments (box 168) Crowding in the incisal segments is recorded as follows: 0- No crowding. 1- One segment crowded. 2- Two segments crowded.  Spacing in the incisal segments (box 169) Spacing in the incisal segments is recorded as follows: 0- No spacing. 1- One segment spaced. 2- Two segments spaced.
  • 77. Dentofacial anomalies : (boxes 166-176)  Diastema (box 170)  Largest anterior maxillary irregularity (box 171)  Largest anterior mandibular irregularity (box 172)  Anterior maxillary overjet (box 173)  Anterior mandibular overjet (box 174)  Vertical anterior openbite (box 175)  Antero-posterior molar relation (box 176) The right and left sides are assessed with the teeth in occlusion and only the largest deviation from the normal relation is recorded. The following codes are used: 0-Normal. 1 -Half cusp. The lower first molar is half a cusp mesial or distal to its normal relation. 2 -Full cusp. The lower first molar is one cusp or more mesial or distal to its normal relation.
  • 78. Need for immediate care and referral: (boxes 177-180) It is the responsibility of the examiner or team leader to ensure that referral to an appropriate care facility is made, if needed. Examples of conditions that require immediate attention include periapical abscess and acute necrotizing ulcerative gingivitis.  Gross caries and chronic alveolar abscesses may also be recorded in box 178.  Three boxes are provided for the recording of the presence (code 1) of the following condition:  A life threatening condition (oral cancer or precancerous lesion) or other severe condition with clear oral manifestation (box 177);  pain or infection that needs immediate relief (box l78);  Other conditions, specify (box 179).  If the subject is referred for care, a "1" should be recorded in (box 180)
  • 79. Space is provided at the bottom of the assessment form for the examiner/recorder to note, for his or her own reference, any additional information that might be pertinent to the subject being examined.
  • 80.
  • 81.  Oral Health Surveys, Basic Methods, 4th Edition ,World Health Organization , 1997.  Oral Health Surveys, Basic Methods, 5th Edition , World Health Organization, 2013. https://apps.who.int/iris/bitstream/handle/10665/97035/9789241548649_eng.pdf?sequence=1  Soben Peter . Essentials of Public Health Dentistry, 5th edition  Hiremath SS, Textbook of Public Health Dentistry, 3rd edition Marya CM. A textbook of public health dentistry. JP Medical Ltd; 2011 Mar 14. References
  • 82. T h a n k y o u