classification of malocclusion

Classification of malocclusion

• Teeth malposition• Arch relationship abnormality

- Dentoalveolar relationship- Skeletal relationship

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Teeth malposition:” Version”

Teeth malposition: transpostion

Teeth malposition: ectopic eruption

Classification of malocclusion

Antrio-posterior arch relationship:• Molar relationship ( Angle’s Classification)• Molar relationship (Andrew’s

Classification)• Incisor relationship( British system).

Classification of malocclusion

• Antro-posterior (molar classification)Class I: The mesio-buccal cusp of the upper first permanent molar occludes in the buccal groove of the lower first permanent molar.

Classification of malocclusion

• Antro-posterior (molar classification)Class II: The mesio-buccal cusp of the upper first permanent molar occludes anterior to the buccal groove of the lower first permanent molar.

Classification of malocclusion

• Antro-posterior (molar classification)Class III: The mesio-buccal cusp of the upper first permanent molar occludes posterior to the buccal groove of the lower first permanent molar.

Classification of malocclusion

• Antro-posterior (incisor classification)Class I: The incisal edge of the lower incisors bite on the cingulum of the upper incisors

Classification of malocclusion

• Antro-posterior (incisor classification)Class II/1: The incisal edges of the lower incisors bite behind the cingulum of the upper incisors with the upper incisors proclined

Classification of malocclusion

• Antro-posterior (incisor classification)Class II/2: The incisal edges of the lower incisors bite behind the cingulum of the upper incisors with the upper incisors retroclined

Classification of malocclusion

• Vertical Classification:Normally the vertical overlap between upper and lower incisors when the teeth are in maximum intercuspation is about one third of the lower incisors

Normal overbite

Classification of malocclusion

• Vertical Classification:Open bite: The lack of vertical overlap between upper and lower incisors when the teeth are in maximum intercuspation.

Reduced overbite

Classification of malocclusion

• Vertical Classification:deep bite: excessive vertical overlap between upper and lower incisors when the teeth are in maximum intercuspation.

Deep overbite

Classification of malocclusion

• Transverse Classification:cross bite: The lower molars overlap the upper molars.

Classification of malocclusion

• Transverse Classification:scissor bite: The lower molars bite completely lingual to the upper molars.

scissor bite

Skeletal Classification

Skeletal Classification

Skeletal Classification