下颌角骨折非加压及加压钛板固定功能稳定性评价.doc

下颌角骨折非加压及加压钛板固定功能稳定性评价【摘要】目的研究功能负载条件下,下颌角骨折非加压与加压钛板的内固定技术的功能稳定性。方法:建立单一线性下颌角骨折体外模型,采用非加压双小钛板。 “く”形非加压钛板、“く”形动力加压钛板固定,测定功能活动时骨断端弯曲及扭转位移,应用Origin6.0软件进行结果分析处理。结果:下颌角骨折功能负载条件下,采用双小钛板沿Champy理想线固定,骨断端产生最大的弯曲及扭转位移;采用“く”形非加压钛板沿下颌骨下缘固定,其弯曲和扭转程度改善明显,采用“く”形动力加压钛板沿下颌骨下缘固定,产生最小的弯曲和扭转位移。结论“く”形动力加压钛板沿下颌骨下缘固定下颌角骨折稳定性最好,“く”形非加压钛板沿下颌骨下缘固定其稳定性较好,双小钛板沿Champy骨折固定理想线固定其稳定性最差。 【关键词】下颌角骨折加压钛板小钛板功能稳定性 中图分类号:R782.4 文献标识码:A 文章编号:1005-0515(2010)03-004-02 Functional stability evaluation of non-compression and compression titanium plates in fixing manbibular angle fractures 【Abstract】Objective: This study was designed to evaluate the functional stability of non-compression and compression titanium plates applied in fixing mandibular angle fractures. Methods: The model of mandibular angle single line fracture was established in vitro. The fracture was fixed by two non-compression mini-titanium plate、“く” non-compression titanium plate .“く” dynamic compression titanium plate. The bite force was loaded on the fixed mandible in vitro. We measured the bending and torsion displacement of the fragments. The data were analyzed by Origin 6.0 soft-ware. Results: Under the bite force loading, the largest bending and torsion displacement were found when we fixed the fracture by two mini-titanium plates on the Champy?s ideal line. When we fixed the fracture by one “く” titanium plate on the inferior border of mandible the bending and torsion displacement decreased significantly. The smallest bending and torsion displacement were found when we fixed the fracture by one “く”dynamic compression titanium plate on the inferior border of mandible.Conclusions: The highest stability appeared while using “く”dynamic compression titanium plate on the inferior border of mandible. Then is using one “く”titanium plate on the inferior border of mandible.The lowest stability was indicated while using two mini-titanium plates on Champy’s ideal line. 【Key words】Mandibular angle fractureNon-compression titanium pla