Classification of malocclusion

CLASSIFICATION OF
MALOCCLUSION
,
www.indiandentalacademy.com

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 UP
CLUSION CLOSING
“CLOSING UP”

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.
DEFINITION

NORMAL AND IDEAL OCCLUSION
“IDEAL” IS A HYPOTHETICAL CONCEPT OR A
STANDARDIZED GOAL.
“NORMAL” IMPLIES TO THE VARIATIONS AROUND
AN
AVERAGE OR MEAN VALUE.

1. Centric relation
2. Centric occlusion

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
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S
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Nwww.indiandentalacademy.com

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 CLASSIFICATIONwww.indiandentalacademy.com

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 III
TRUE
PSUEDO
CLASS II SUB DIV
CLASS III SUB DIV

SHORT COMINGS OFANGLE’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
HOWARDS
TAYALORS
LISCHERS
DEWEYS

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 MANDIBULAR
INCISORS ARE CROWDED AND INCISORS
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
MID SAGITAL
PLANE
ATTRACTION
ABTRACTION
PROTRACTION
RETRACTION
CONTRACTION
DISTRACTIONwww.indiandentalacademy.com

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
MESIAL STEP
DISTAL
STEP
CLASS I
OR
CLASS II
CLASS I
OR
CLASS III
CLASS II

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
IDEAL
CROWDING
SPACING
STEP 2
PROFILE
AND
DIVERGENCE
STRAIGHT (ORTHOGNATHIC)
CONVEX
CONCAVE
STEP 3
STRAIGHT
ANTERIOR
POSTERIOR
TRANSVERSE PLANE
BUCCO LINGUAL
RELATIONSHIP OF
POST TEETH

STEP 4 SAGITAL PLANE
STEP 5
ANGLES CLASS I
ANGLES CLASS II
ANGLES CLASS III
VERTICAL PLANE
OPEN BITE
DEEP BITE
SKELETAL
DENTAL
BITE DEPTH

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

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Classification of malocclusion