Classification of malocclusion /certified fixed orthodontic courses by Indian dental academy

CLASSIFICATION
OF
MALOCCLUSION

www.indiandentalacademy.com

INDIAN DENTAL ACADEMY
Leader in continuing dental education


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

OC
CLUSION

UP
CLOSING

“CLOSING UP”

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.


NORMAL AND IDEAL OCCLUSION
“NORMAL” IMPLIES TO THE VARIATIONS
AROUND AN
AVERAGE OR MEAN VALUE.

“IDEAL” IS A HYPOTHETICAL CONCEPT OR A
STANDARDIZED GOAL.


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

L
I
N
E
OF


O
C
C
L
U
S
I
O
N

C
A
T
E
R
N
A
R
Y
C
U
R
V
E

ANY DEVIATION IN NORMAL OCCLUSION.


WHY TO CLASSIFY?


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.

VARIOUS SYSTEMS OF CLASSIFICATION
ANGLE SYSTEM AND ITS MODIFICATIONS
SIMONS SYSTEM
AETIOLOGICAL CLASSIFICATION
BAUME CLASSIFICATION OF PRIMARY TEETH
ACKERMANN AND PROFITT CLASSIFICATION
BALLARDS CLASSIFICATION
WHO CLASSIFICATION

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

CLASS II
DIVISION I
DIVISION II

TYPE A
TYPE B
TYPE C

CLASS II SUB DIV

CLASS III

TRUE
PSUEDO

CLASS III SUB DIV

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.

MODIFICATIONS
LISCHERS
DEWEYS
HOWARDS
TAYALORS

LISHERS MODIFICATION













NEUTROCCLUSION
DISTOCCLUSION
MESIOCCLUSION
BUCCOCCLUSION
LINGUOCCLUSION
SUPRAOCCLUSION
INFRAOCCLUSION
MESIOVERSION
DISTOVERSION
TRANSVERSION
AXIVERSION
TORSIVERSION

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

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

HOWARDS MODIFICATION
ANGLES CLASS II GROWTH PROBLEM
ANGLES CLASS I NON GROWTH PROBLEM

TAYLORS MODIFICATION
BIMAXILLARY PROTRUSION

CLASS IV


SIMON CLASSIFICATION

FRANKFORT HORIZONTAL
PLANE

ORBITAL PLANE

ATTRACTION
ABTRACTION

PROTRACTION
RETRACTION

MID SAGITAL
PLANE

CONTRACTION

DISTRACTION

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


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


ETIOLOGICAL
CLASSIFICATION
BY MOYER'S

OSSEOUS
MUSCULAR
DENTAL


BALLARD'S CLASSIFICATION

CLASS I

CLASS II

CLASS III


VENN DIAGRAM

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


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


Right now my life is just one learning
experience after another……
By the end of the week I should be
a genius!
Jeanette Osias


THANK YOU


Classification of malocclusion /certified fixed orthodontic courses by Indian dental academy

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