CLASSIFICATION OF

MALOCCLUSIONBy,

Dr.Arun kumar.G Reader, Dept. of Orthodontics &

Dentofacial orthopedics, College of Dental sciences.

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 UPCLUSION 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

“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

LINE

OF

OCCLUSION

CATERNARY

CURVE

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 THEJAWS WITH EACH OTHER

CONSIDERS MAXILLARY FIRST PERMANENT MOLAR

CLASS II DIVISION I

DIVISION IITYPE ATYPE BTYPE C

CLASS IIITRUE

PSUEDO

CLASS II SUB DIV

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

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

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

MESIAL STEP

DISTAL STEP

CLASS IOR

CLASS II

CLASS IOR

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 1ALIGNMENT

ANDSYMMETRY

IDEALCROWDING

SPACING

STEP 2

PROFILE

AND

DIVERGENCE

STRAIGHT (ORTHOGNATHIC)CONVEX

CONCAVE

STEP 3

STRAIGHTANTERIORPOSTERIOR

TRANSVERSE PLANEBUCCO LINGUAL

RELATIONSHIP OF POST TEETH

STEP 4 SAGITAL PLANE

STEP 5

ANGLES CLASS I ANGLES CLASS IIANGLES CLASS III

VERTICAL PLANE

OPEN BITEDEEP BITE

SKELETALDENTAL

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

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