Fig. 3
From: Inclination of mandibular incisors and symphysis in severe skeletal class III malocclusion
Examples of cephalometric digitization in severe skeletal class III patients before (T0) and after(T1) presurgical decomposition orthodontic treatment. The two patients’ lower central incisors exceeded the alveolar bone house after decomposition. IA:the long axis of the lower central incisor; D:the centre point of the mandible symphysis; dotted line: the line passing through the labial and lingual lower alveolar edge of the lower central incisor; MA: the line from the midpoint of the line between the labial and lingual lower alveolar edge and point D; MIA: the angle between the IA and the MA; IMPA: the angle between the IA and the MP