CLASSIFICATION OF MALOCCLUSIONBy, Dr.Arun kumar.G Reader, Dept. of Orthodontics & Dentofacial orthopedics, College of Dental sciences.

CLASSIFICATION SYSTEMIS 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 CLOSINGCLOSING 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 OCCLUSION1.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 CLASSIFICATIONANGLE SYSTEM AND ITS MODIFICATIONSSIMONS SYSTEMAETIOLOGICAL CLASSIFICATIONBAUME CLASSIFICATION OF PRIMARY TEETHACKERMANN AND PROFITT CLASSIFICATIONBALLARDS CLASSIFICATIONWHO CLASSIFICATION

ANGLE SYSTEMBY 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 CCLASS IIITRUE

PSUEDOCLASS II SUB DIVCLASS III SUB DIV

SHORT COMINGS OF ANGLES 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

TAYALORSLISCHERS DEWEYS

LISHERS MODIFICATIONNEUTROCCLUSIONDISTOCCLUSIONMESIOCCLUSIONBUCCOCCLUSIONLINGUOCCLUSIONSUPRAOCCLUSIONINFRAOCCLUSIONMESIOVERSIONDISTOVERSIONTRANSVERSIONAXIVERSIONTORSIVERSION

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 PROBLEMTAYLORS MODIFICATION

BIMAXILLARY PROTRUSION CLASS IV

SIMON CLASSIFICATIONFRANKFORT HORIZONTAL PLANEORBITAL PLANEMID SAGITAL PLANEATTRACTIONABTRACTIONPROTRACTIONRETRACTIONCONTRACTIONDISTRACTION

ADVANTAGES

1 . 3 DIMENSIONAL - MORE PRECISE

2. LAYS EMPHASIS ON THE ORIENTATION OF DENTAL ARCHES TO THE FACIAL SKELETONDISADVANTAGESIT IS TIME CONSUMING AND CUMBERSOME

BAUME CLASSIFICATION OF PRIMARY TEETHSTRAIGHT OR FLUSH TERMINAL PLANEMESIAL STEP DISTAL STEPCLASS IORCLASS IICLASS IORCLASS IIICLASS II

ETIOLOGICAL CLASSIFICATIONBY MOYER'SOSSEOUS

MUSCULAR

DENTAL

BALLARD'S CLASSIFICATIONCLASS ICLASS IICLASS III

VENN DIAGRAM

ACKERMAN AND PROFIT CLASSIFICATIONDIAGRAMATIC CLASSIFICATION OF MALOCCLUSION IN 1960STEP 1ALIGNMENTANDSYMMETRYIDEALCROWDINGSPACINGSTEP 2PROFILE

AND

DIVERGENCESTRAIGHT (ORTHOGNATHIC)CONVEXCONCAVESTEP 3STRAIGHTANTERIORPOSTERIORTRANSVERSE PLANEBUCCO LINGUAL RELATIONSHIP OF POST TEETH

STEP 4SAGITAL PLANESTEP 5ANGLES CLASS I ANGLES CLASS IIANGLES CLASS IIIVERTICAL PLANEOPEN BITEDEEP BITESKELETALDENTALBITE 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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