Fig. 2
From: Inclination of mandibular incisors and symphysis in severe skeletal class III malocclusion
Examples and illustration of the CBCT measurement of the MIA in severe skeletal class III patients. 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