Classification of malocclusion

Classification of malocclusionDrTaskeen

Occlusion

Skeletal PatternsCephalometric analyses reveal to the orthodontistthe skeletal component of the patientrsquos malocclusionWe can classify patients as a 1048707 Class I Skeletal Pattern1048707 Class II Skeletal Pattern1048707 Class III Skeletal PatternThese patterns often correspond with the AngleClassification but not necessarily all the timeUnderstanding the skeletal pattern is essential for choosing the proper treatment mechanics

SKELETAL BASE I

SKELETAL BASE II

SKELETAL BASE III

Hypodivergent Skeletal Pattern1048707 A skeletal pattern inwhich the skeletal planesare more parallel to eachother1048707 Characterized by a lowmandibular plane angleshort lower facial heightand is often associatedwith Class II Division 2malocclusions

Hyperdivergent Skeletal Pattern1048707 A skeletal pattern thatdeviates from the norm inthat there is an excessivedivergence of the skeletalplanes (determined by theanalysis used)1048707 Characterized by a steepmandibular plane angle along anterior lower faceheight with open bitetendency lip incompetenceand often associated withClass II malocclusion

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references PROFFIT 5TH EDITION Moyers Bishara Angles orthodontics journal

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Overjet is a term used toDescribe HORIZONTAL distance between thelabial surfaces of the mandibularincisors and the incisal edge of themaxillary incisors

Anterior Crossbite is amalrelation between the maxillaryand mandibular teeth when theyocclude with the antagonistictooth in the opposite relation tonormal

Crossbites Deviation from normal buccolingual relationship1048707 A Posterior Crossbite is present when posterior teeth occlude in an abnormal buccolingual relation with the antagonistic teeth Posterior Crossbites can be the result of either malposition of a tooth or teeth andor the skeleton

The British Standards Institute classify the incisor relationship as Class I Class II division I or division II and Class III

Class I

The lower incisal edges occlude with or lie immediately below the cingulum of the upper incisors

Class II division I

The lower incisal edge occludes behind the cingulum of the upper central incisors and the upper incisors are proclined

Class II division II

The lower incisal edge occludes behind the cingulum of the upper central incisors and the upper incisors are retroclined (the lateral incisors may be proclined)

Class III

The lower incisal edge occludes in front of the cingulum of the upper incisors

If the upper canine is positioned in the embrasure between the lower canine and first premolar the canine occlusion is called Cl I If the upper canine is positioned mesial to the embrasure between the lower canine and first premolar the canine occlusion is called Class II If the upper canine is positioned in the embrasure between the lower canine and first premolar the canine occlusion is called Class III

CANINE CLASSIFICATION

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