大鼠髁状突颈部骨折不同处理对下颌骨生长发育的影响

Effects on the growth and development of mandible with differ treatment following condylar neck fracture in rat

作者对两组年幼大白鼠髁状突颈部骨折分别采用非骨间固定与骨间固定，观察比较两种处理方法对下颌骨生长发育的长期影响。结果表明：两种处理均对下颌骨生长发育产生了一定的影响，表现为髁头较小，髁颈增厚，下颌骨体校长，喙突较短。但下颌骨生长发育基本完成，除固定组升枝较短于健侧外，其余左右侧基本对称。两种处理间各项比较均无显著性差异。本研究结果提示对年轻者髁状夹颈部骨折可采取保守治疗。

The condylar necks of young rats are fractured on this experiment, Fractures are treated with nonfixation and fixation, The growth and development of mandible can be interrupted in two groups, with a relatively small in condylar head, a relatively thick in condylar neck, A coronoid and a mandible length are relatively short. But the growth and development of mandible almost are completed,bilateral mandibles are almost symmetry except for ramus. The difference are not found in between two groups. The results of this study implied that young condylar neck fracture may be treated by conservation.