陈旧性下颌骨骨折因骨折断端错位愈合常导致一系列的口颌系统功能障碍和面部畸形,其治疗原则应该是“功能优先、兼顾形态”。再骨折复位适用于纤维性愈合的陈旧性骨折;骨切开或截骨复位适用于骨性愈合的陈旧性骨折。牵张成骨技术治疗陈旧性下颌骨骨折可以避免供区损伤,获得比较理想的外形,同时可修复软、硬组织的缺损,下牙槽神经也能得到适应性改建。 Old fracture of the mandibular fracture due to fracture dislocation healing often leads to a series of oral mandibular system dysfunction and facial deformity, the treatment principle should be “functional priority, taking into account the morphology ”. Re-fracture reduction applies to fibrous old heal fractures; osteotomy or osteotomy reset for bone healing of old fractures. Distraction osteogenesis in the treatment of obsolete mandibular fractures can avoid the donor area injury, obtain the ideal shape, repair the defects of both soft and hard tissue, and lower alveolar nerve can be adapted.