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2. INDIAN DENTAL ACADEMY
Leader in continuing dental education
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3. CLASSIFICATION SYSTEM
• IS A GROUPING OF CLINICAL CASES
OF SIMILAR APPEARANCE FOR EASE
IN HANDLING AND DISCUSSION,IT IS
NOT A SYSTEM FOR DIAGNOSIS
,METHOD FOR DETERMINING
PROGNOSIS OR A WAY OF DEFINING
TREATMENT
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5. DEFINITION
THE RELATIONSHIP OF THE MAXILLARY
AND MANDIBULAR TEETH WHEN THE JAWS
ARE CLOSED IN CENTRIC RELATION
WITHOUT STRAIN OF MUSCULATURE OR
DISPLACEMENT OF CONDYLES IN THEIR
FOSSAE.
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6. NORMAL AND IDEAL OCCLUSION
“NORMAL” IMPLIES TO THE VARIATIONS
AROUND AN
AVERAGE OR MEAN VALUE.
“IDEAL” IS A HYPOTHETICAL CONCEPT OR A
STANDARDIZED GOAL.
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7. SIX KEYS OF NORMAL OCCLUSION
1.MOLAR INTER-ARCHRELATIONSHIP
2.MESIODISTAL CROWN ANGULATION
3.LABIOLINGUAL CROWN INCLINATION
4.ABSENCE OF ROTATION
5.TIGHT CONTACTS
6.CURVE OF SPEE
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12. REASONS FOR CLASSIFYING
TO GROUP CERTAIN MALOCCLUSIONS
TOGETHER WHICH MAY OR MAY NOT
HAVE THE SAME ETIOLOGY.
EASE OF REFERENCE, COMPARISON AND
COMMUNICATION.
THINKING OF THE POSSIBLE TREATMENT
MODALITIES THAT MAY BE NEEDED IN A
PARTICULAR CASE.
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13. VARIOUS SYSTEMS OF CLASSIFICATION
ANGLE SYSTEM AND ITS MODIFICATIONS
SIMONS SYSTEM
AETIOLOGICAL CLASSIFICATION
BAUME CLASSIFICATION OF PRIMARY TEETH
ACKERMANN AND PROFITT CLASSIFICATION
BALLARDS CLASSIFICATION
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WHO CLASSIFICATION
14. ANGLE SYSTEM
BY EDWARD HARTLEY
ANGLE
WAS CONSIDERED THE
FATHER OF MODERN
ORTHODONTICS
BASED ON THE ANTERO
POSTERIOR RELATIONSHIP
OF THE
JAWS WITH EACH OTHER
CONSIDERS MAXILLARY
FIRST PERMANENT MOLAR
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16. CLASS II
DIVISION I
DIVISION II
TYPE A
TYPE B
TYPE C
CLASS II SUB DIV
CLASS III
TRUE
PSUEDO
CLASS III SUB DIV
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17. SHORT COMINGS OF ANGLE’S
CLASSIFICATION
DOES NOT CONSIDER MALOCCLUSION IN VERTICAL
AND TRANSVERSE PLANE.
CANNOT BE APPLIED IF FIRST PERMANENT MOLARS
ARE MISSING.
CANNOT BE USED IN DECIDUOUS DENTITION.
DOES NOT INDICATE THE ETIOLOGY OF
MALOCCLUSION.
NO SKELETAL RELATIONSHIP IS CONSIDERED
MALFUNCTIONS OF MUSCLES AND BONES ARE
OVERLOOKED.
DOES NOT INDICATE THE COMPLEXITY OF THE
PROBLEM.
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20. DEWEYS MODIFICA TION
ANGLES CLASS I
TYPE I CROWDED ANTERIORS
TYPE 2 MAXILLARY INCISORS ARE PROCLINED AND
SPACED
TYPE 3 ANTERIOR CROSS BITE
TYPE 4 POSTERIOR CROSSBITE
TYPE 5 IS SIMILAR TO TYPE 1 BUT IS DUE TO DRIFTING
OF TEETH
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21. ANGLES CLASS II
NO MODIFICATIONS
ANGLES CLASS III
TYPE I OVERLAPED BY MAXILLARY ARE MANDIBULAR
INCISORS CROWDE
TYPE II UPPER AND LOWER ANTERIORS ARE IN
EDGE
TO EDGE RELATION
TYPE III ANTERIOR CROSS BITE
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22. HOWARDS MODIFICATION
ANGLES CLASS II GROWTH PROBLEM
ANGLES CLASS I NON GROWTH PROBLEM
TAYLORS MODIFICATION
BIMAXILLARY PROTRUSION
CLASS IV
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24. ADVANTAGES
1 . 3 DIMENSIONAL - MORE PRECISE
2. LAYS EMPHASIS ON THE ORIENTATION
OF DENTAL ARCHES TO THE FACIAL
SKELETON
DISADVANTAGES
IT IS TIME CONSUMING AND CUMBERSOME
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25. BAUME CLASSIFICATION OF PRIMARY TEETH
STRAIGHT OR FLUSH
TERMINAL PLANE
CLASS I
OR
CLASS II
CLASS I
OR
CLASS III
MESIAL STEP
CLASS II
DISTAL
STEP
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30. ACKERMAN AND PROFIT CLASSIFICATION
DIAGRAMATIC CLASSIFICATION OF MALOCCLUSION IN 1960
STEP 1
ALIGNMENT
AND
SYMMETRY
STRAIGHT (ORTHOGNATHIC)
CONVEX
CONCAVE
PROFILE
STEP 2
IDEAL
CROWDING
SPACING
AND
DIVERGENCE
STEP 3
TRANSVERSE PLANE
STRAIGHT
ANTERIOR
POSTERIOR
BUCCO LINGUAL
RELATIONSHIP OF
POST TEETH
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31. STEP 4
SAGITAL PLANE
ANGLES CLASS I
ANGLES CLASS II
ANGLES CLASS III
STEP 5
VERTICAL PLANE
BITE DEPTH
OPEN BITE
DEEP BITE
SKELETAL
DENTAL
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32. Right now my life is just one learning
experience after another……
By the end of the week I should be
a genius!
Jeanette Osias
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