Conclusion The use of rigid internal fixation through an intraoral and transoral approach can be applied to the patients of angle and ramus fractures without severely dislocated fracture fragment.

• 结论口内辅助颊部小切口人路行坚固内固定对不伴有严重错位或粉碎性骨折的下颌骨角部和升支部骨折有较好疗效。