ANGLE’S CLASSIFICATION OF MALOCCLUSION
EDWARD ANGLE , 1899
FIXED ANATOMICAL LANDMARK WITHIN THE
JAWS
KEY TO OCCLUSION
CLASS I
CLASS II
CLASS III
ANGLE’S CLASS I MALOCCLUSION
Normal Skeletal RelationNormal Muscle Function
ASSOCIATED DENTAL IRREGULARITIES
CROWDING
SPACING
ROTATION
MISSING TOOTH
CLASS I BIXALLIARY PROTRUSION
ANGLE’S CLASS II MALOCCLUSION
CLASS II , division 1
CLASS II , division 1
Abnormal Muscle Activity
CLASS II , division 1
Abnormal Muscle Activity
CLASS II , division 1
Abnormal Muscle Activity
Lower lip cushion’s the palatal aspect of the upper teeth
LIP TRAP
CLASS II , division 1
CLASS II , division 1
‘V’ SHAPED ‘U’ SHAPED
CLASS II , division 2
CLASS II , division 1
CLASS II , division 2
CLASS II , division 2
Squarish appearance
Traumatised mandibular labial gingiva
Normal perioral muscle activity
Abnormal path of closure may be present
CLASS II , division 2
LEFTRI
GHT
CLASS II , subdivision
CLASS III MALOCCLUSION
CLASS III MALOCCLUSION
1) Excessively Large Mandible
TRUE CLASS III
2) Forwardly Placed Mandible
TRUE CLASS III
3) Retro-positioned maxilla
TRUE CLASS III
4) Smaller than Normal Maxilla
TRUE CLASS III
Class III Malocclusion
• Due to forward movement of the mandible during jaw closure
POSTURAL / HABITUAL Class III
PSEUDO CLASS III
1 •Presence of Occlusal Prematurities
2 •In case of premature loss of deciduous posteriors, the child tends to move the mandible forward to establish contact in the anterior region
3 •Child with enlarged adenoids tends to move the mandible forward in an attempt to prevent tongue from contacting the adenoids
PSEUDO CLASS III
RIGHT
LEFT
CLASS III , subdivision
CLASS III , Subdivision
THANK YOU !
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