Classification of Malocclusion
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Transcript of Classification of Malocclusion
Classification of malocclusion
• Teeth malposition• Arch relationship abnormality
- Dentoalveolar relationship- Skeletal relationship
Dr shabeel pnhttp://hi-dentfinishingschool.blogspot.com/
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