-
Class I
- Normal occlusion, molar and canine relationship.
- Straight facial shape
- Class 1 malocclusion: abnormal occlusion (crowding of anterior teeth or rotation)
-
Class 2 Div 1
- Retrognathic- Upper jaw appears more prominent.
- Molar relationship: maxillary anterior teeth are protrude, teeth are proclaimed and a large over jet is present.
- **Lips dont seal properly.
- Convex facial shape
-
Class 2 Div 2
- molar relationship- MB cusp of upper first molar sits mesially of the lower first molar- between 5 and 6.
- Maxillary central incisors are retroclined, the lateral incisors may be proclaimed or normally inclined.
- Retroclined and a deep bite usually exists.
- Convex facial shape
-
Class 3
- Prognathic
- Mandible appears more prominent.
- Molar relationship: mesiobuccal cusp of maxillary first molar occludes distally to mesiobuccal groove of mandibular first molar.
- Canine relationship: distal surface of the mandibular canine are medial to the mesial surface of the maxillary canines by at least the width of the premolar, mandibular incisors are in complete cross-bite.
- Facial shape is Concave
|
|
