目的 观察髁突颈部骨折骨间固定和非骨间固定对下颌骨生长发育的影响.方法 选取健康新西兰大耳白兔21只,随机分为空白对照组、骨折固定组、骨折非固定组.建立人工下颌骨髁突骨折模型,骨折固定组进行微型钛板坚固内固定术.术后4,8,12周处死动物,进行X线观察、SNB角及下颌骨标本测量.结果 骨折固定组术后各测量值显示左右侧发育不存在明显差异,而骨折非固定组差异明显,尤其在升支高度、髁突长度、下颌骨体长度、下颌角等方面明显.结论 髁突骨折坚固内固定术对下颌骨的生长发育影响较小.%Objective It is to observe the influence of fracture micro-osteosynthesis fixation and non-fixation on the growth of the mandible in mandibular condylar neck fracture. Methods 21 healthy New Zealand rabbits were chosen and randomly divided into blank control group, fixation group and non-fixation group. Mandibular condylar neck fracture models were established, and fracture fixation group was treated with micro-titanium board osteosynthesis fixation. Skull X -ray flank film was observed and SNB angle and the mandible were measured. Results Measurement results of fixation group showed no significant difference between right and left mandible, however, in non-fixed group, significant differences were observed, especially in sticks height, the length of the mandible and the condyle, the mandibular angle height. Conclusion Rigid internal fixation has less influence on the mandibular grouth of rabbits at the developmental stage.
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