摘要
目的:从生物力学角度探讨髁状突颈部复合型骨折坚强内固定方式选择。方法:用三维有限元法分析髁状突颈部复合型骨折于髁颈部采用单小型钛板和两个小型钛板两种方式固定后,下颌骨位移等值线图、von Mi ses应力等值线图和固定板最大von Mi ses值。结果:单板固定位移值在右侧关节骨折段减小,在中间和左侧骨折段增大;应力传导轨迹在左侧外斜线和右侧乙状切迹中断;固定板最大von Mi ses应力为574.179Mpa。双板固定位移值右侧关节骨折段较单板固定大,中间和左侧骨折段较小;应力轨迹未中断;后缘固定板最大von Mi ses应力为263.324Mpa,前缘为199.122Mpa。结论:从生物力学角度看,对于单侧髁颈部骨折伴有对侧颏旁区骨折,在髁颈部骨折区采用两块小型钛板固定优于单块小型钛板固定。
Objective To select the compound condylar fractures internal rigid fixation method from a biomechanical perspective. Method Three-dimensional finite erement method was used to analyze the displacement isograms, the von Mises stress isograms of the mandible and the maximum von Mises value in the fixed plate when the compound condylar fracture fixed with single mini titanium plates or two mini titanium plates in condylar neck. Results When fixed with single plate, the displacement value decreased in the right articular fracture segment, while it increased in the middle and the left segment; the stress conduction tracks in the left external oblique line and the right sigmoid notch interrupted; and the maximum von Mises stress in the fixed plate was 574.179Mpa. Compared with single plate fixation, when fixed with double plate, the displacement value in the right articular fracture segment was greater and it was smaller in the middle and the left segment; the stress conduction tracks did not interrupt; the maximum yon Mises stress in the posterior plate was 263.324Mpa and in the anterior plate was 199.122Mpa. Conclusion From a biomechanical perspective, for the type of unilateral condylar neck fractures associated with contralateral parasymphseal fractures, two mini titanium plate fixation is better than single mini titanium plate fixation in condylar neck fracture zone.
出处
《中国美容医学》
CAS
2012年第09X期91-93,共3页
Chinese Journal of Aesthetic Medicine
基金
陕西省科技攻关项目(No.2011K12-04-02)
西安交通大学医学院第一附属医院基金(2006YK18)
关键词
髁状突骨折
坚强内固定
三维有限元
condylar fracture
internal rigid fixation
three dimensional finite element
