下颌骨占据面下1/3,极易受意外打击,发生在下颌骨的骨折约占颅面骨折病例的近2/3[1],目前下颌骨骨折主要采用手术切开复位内固定术和牙弓夹板固定术,手术治疗适合复杂性、多发性、粉碎性骨折,具有效果好、骨折愈合快等优点,但手术创伤大,需二次手术取出内固定物,面部切口易留瘢痕,儿童可能损伤牙胚及费用昂贵等使很多患者望而却步。而外固定法主要为牙弓夹板颌间固定、小环结扎及骨间螺钉颌间固定,普通牙弓夹板均为金属板条制成,具有固位不稳,易造成骨折 Mandibular surface occupies the next 1/3, vulnerable to accidental blows occurred in the mandibular fracture accounts for about 2/3 of craniofacial fractures [1], the current mandibular fractures mainly by surgical incision and reduction and internal fixation and Dental arch splint fixation, surgical treatment for complex, multiple, comminuted fracture, with good effect, fracture healing and other advantages, but the surgical trauma, requiring two surgical removal of internal fixtures, facial incision easily scarring, children Many people may be discouraged by the potential for damaging tooth germs and their cost. The external fixation method is mainly dental arch splint intermaxillary fixation, ligation of small rings and interosseous screws intermaxillary fixation, ordinary dental splint are made of metal strips, with instability, easy to cause fracture