一、概述: 下颌骨髁状突是下颌骨骨折的好发部位之一,占下颌骨骨折的32.4%～36.3%,也有报道在21.59%～26.36%的范围。多数发生在青壮年期。儿童的发病率较低,约占颌骨骨折的10%,而占下颌骨骨折的1.4%～2.78%。由于髁状突是颞颌关节的组成部分,其治疗结果会直接影响到下颌运动与面部外形。髁状突区骨折后出现一系列特征性临床症状(如单侧骨折可使下颌骨向患侧偏位,对侧咬(牙合)关系改变。双侧骨折可使前牙开(牙合), I. Overview: Mandibular condyle is one of the most common sites of mandibular fractures, accounting for 32.4% -36.3% of the mandibular fractures. It is also reported in the range of 21.59% -26.36%. Most occur in adolescence. The incidence of children is low, accounting for about 10% of jaw fractures, and accounted for 1.4% ~ 2.78% of mandibular fractures. Because the condyle is an integral part of the temporomandibular joint, the outcome of the treatment will directly affect the mandibular movement and facial contour. A series of characteristic clinical symptoms appear after the condylar fractures (such as the unilateral fractures can make the mandibular deviation to the affected side, the contralateral bite (occlusal) changes. Bilateral fracture can open the anterior teeth (occlusal) ,