Objective To establish the three-finite element models of the mandible before and after Sagittal split ramus osteotomy(SSRO).

Conclusion the use of autogenous mandible ramus in temporomandibular joint reconstruction is the best method in the treatment of temporomandibular joint ankylosis.

Objective To discuss the way of open reduction and internal fixation for fractured condylar neck and mandible ramus via intraoral approach aiming to avoid the facial incision.