Abstract: Objective  To provide anatomical parameters for adult mandibular defect repair, reconstruction and facial bone remodeling.    Methods    A total of 49 volunteers (21 males and 28 females) were recruited. Seventy-one mandibular shaft specimens were collected for CT scanning. Mimics software was used to establish three-dimensional models of mandible for 120 cases from Inner Mongolia, and mandible indexes of 120 cases from Inner Mongolia were measured. The mandible data of 120 cases from Inner Mongolia were compared bilaterally, in male and female, with modern mandible data from North China. Results    There were no statistical differences in all bilateral measurements between male and female volunteers (P>0.05), except for mandibular angle, male was larger than female, and female was larger than male in mandibular angle.    Conclusions    Compared with other areas of North China, Inner Mongolia population has wider mandible, more prominent jaw, smaller mandibular angle and stronger masticatory muscle. When designing mandibular prosthesis for people in Inner Mongolia, it is more appropriate to design the shape of thick mandibular body, large sagittal cross-section area and small body height and mandibular ramus height.

Key words:  , Mandible,  ,  , Three-dimensional CT measurement,  ,  , Lnner Mongolia