By: Hessa Habib

1. The Student Quiz
LEC 1&2&3 Quiz (DHS1)
Answer the following questions:
1-Mandibular teeth refers to the………teeth that contains……………………..
2- Mixed or transition dentition from ……………..years old.
3- The total number of ………. teeth is 20 and the total number of the …………..is 32.
4- All primary teeth are replaced with permanent teeth except for the …………. which
are replaced by the permanent premolars.
5-What is the difference between successor and predecessors?
Write T for true and F for false.
1- This dental formula represents permanent dentition. ( )
2-Succedaneous refers to those teeth of the permanent dentition that replace primary
teeth (incisors, canines, and premolars of the permanent dentition). ( )
3- When naming a tooth we follow the following sequence: ( )
a. Dentition: Permanent or Deciduous.
b. Side: Right or left
c. Type of tooth: Premolar, Molar….
d. Arch: Maxillary or Mandibular.
4-The maxillary premolar has 2 roots.( )
5- The FDI naming system was established since 1947. ( )

2. Circle the right answer.
1-The letters A to T are used for
a. Primarydentitionpalmernotationsystem
b. Primarydentitionuniversalnotationsystem
c. PermanentdentitionFDInotationsystem.
2- In FDI notationsystem the numbersare :
a. Pronouncedseparately(12one two)
b. Onlyforpermanentdentition
c. Indicate the amountof caries
3-The crown & root join at the
a. Dental enamel junction
b. junctional epithelial
c. cementoenamel junction tissues
5- The arrow in the image on the right is at the
a. pulp
b. dentin
c. cementum
Match the words below.
1-When examining a 6-7 years old kid, the central incisors usually have three
prominences, or scallops which are usually seen along the incisal edge, these
prominences are called…………..
2-………….. is the visible part of the tooth.
3-A ……………is a convexity found on the lingual surface of anterior teeth
Labial crown proximal cingulum ridge sulcus mamelons

3. 4-The depression or concavity in the occlosal; part of the tooth is called a
……………..
5- ………… are any linear, flat elevations on teeth
Circle the correct answer:
1-Each root is divided into horizontal thirds:
a. Cervical, middle, and apical
b. mesial, middle, and distal
c. occlusal ,middle, and cervical
2-The occlusal surface is the broad chewing surface found on the
a. labial teeth (central and lateral incisors)
b. anterior teeth (central and lateral incisors)
c. posterior teeth (bicuspids and molars)
3-A __________is the lingual lobe of an anterior tooth and appears on the cervical third
of the tooth.
a. Cingulum
b. Mamelon
c. Marginal ridge
4-A fossa is an irregular __________ on the surface of a tooth.
a.concavity
b.depression
c.elevation
5- Mandibular premolars are:
a. Single rooted

4. b. Double rooted
c. Triple rooted
Follow the arrow and write the name of the point angles.
Using the FDI notation system write down the teeth numbers:

5. State the difference.
1- Mandibular 2nd premolars lobes and maxillary premolars lobes.
2- Enamel and dentin.
3- Calcification of 3-4 months in utero and calcification of 6 months in utero.
4-Erruption and emergence.

6. Circle the correct answer.
1-This picture shows a :
a. Mixed dentition of a 12 year old
b. Mixed dentition of a 6 years old
c. Primary dentition of a 6 year old
2- Between what ages do first permenant molars erupt?
a. 5-6 years old
b. 6-7 years old
c. 10-11 years old
4- Lower first premolar erupts at
a. 10 - 11 Years
b. 13-14 years
c. 7-8 years
5- Lobes develop
a.cingulum and cusps
b. mamelons
c.All of the above
6- Triangular ridges:
a. Are on the posterior and anterior teeth
b. Are on the anterior teeth only
c. Are on the posterior teeth only
7- In a developmental tooth ,the first structure that forms is:
a. dentin
b. enamel
c. pulp

7. 8-In a baby the first tooth to appear are
a. the mandibular central incisors
b. the maxillary central incisors
c. the mandibular lateral incisors
8- Usually extraction in boys and girls is
a. Girls and boys equally
b. Girls before boys
c. All of the above is true
9-In primary dentition lower canines erupts during:
a.17-20 years
b. 17-20 months
c. 6-8 months
10- Abnormalities of tooth formation and calcification:
a. Hypodontia, fusion of teeth, trauma and natal teeth.
b. flurosis ,chronological hypoplasia, Amelogenesis imperfecta and dentogenesis
imperfect.
c. all of the above

8. Write the correct answer:
1-The functions of the mouth include …………………………………..
2-The …………. of a tooth is the part covered by enamel, whereas the ……….. is
the part that projects or seen in the oral cavity.
3-Enamel is a product of ……… and is produced by ……………..
4-………. covers the roots of teeth & attaches the teeth to the alveolar bone by
periodontal fibers.
5-…………….. is comprised of the tissue that covers the hard palate and the
gingiva associated with keratinized stratified squamous epithelium .
Write T for True and F for false.
1-Dentin and pulp are specialized connective tissue. ( )
2-The pale pink to darker shades range of colors in a gingiva indicates some
abnormalities. ( )
3-Principal fibers are the fibers that connect the cementum to the alveolar bone. (
)
4-The gingival epithelium facing the tooth is divided into the sulcular (attached)
and junctional (unattached) epithelia and it is keratinized. ( )
5-Major glands are the large extra-orally located pairs of glands, namely parotid,
submandibular and sublingual and are all in total 6. ( )
Circle the correct answer:
1- Production of dentin ,maintenance of dentin ,repair of dentin ,sensation , and
defense these are functions of:
a. Dentin
b. Pulp
c. Both a and b

9. 2- There are ______ of cementum:
a. Two types cellular and acellular
b. 1 type symmetrical
c. 3 types cellular and acellular and symmetrical
3-________ consists of four components: dentogingival junction, periodontal ligament,
cementum and alveolar bone.
a. Periodontuim
b. Oral mucosa
c. Gingiva
4-Enamel is composed of more than __________in the form of hydroxyapatite (
crystals) and________________.
a. 65% organic material and 35% inorganic materials and water.
b.4% of water and organic materials and 96% of inorganic materials.
c. 96% inorganic material and 4% of water and organic material.
5-__________ is composed of 65% minerals (calcium hydroxyapatite) & 35%
organic matter (collagen & ground substance) & water.
a. Cementum
b. Enamel
c. Alveolar bone
Done by: Hessa Habib