摘要
目的研究髋臼后壁骨折及其经内固定后的髋臼接触特征的变化。方法运用压敏片技术分别测量正常髋臼,髋臼后壁骨折及经用重建钢板(RP)和重建钢板+分叉钢板(RP+SP)两种方法内固定后髋臼的接触面积和接触应力。结果髋臼后壁骨折后接触面积较正常髋臼下降34%,经RP固定后接触面积恢复至正常的80%,RP+SP固定后恢复至正常的92%。髋臼后壁骨折后接触压力和接触应力明显增加,两种内固定方法固定后接触压力和接触应力随之减小。结论髋臼后壁骨折引起髋臼接触面积下降、应力集中,两种内固定方式均能有效恢复髋臼的接触面积,降低接触应力,其中RP+SP固定的效果更为明显。
To explore the variation of contact characteristics of acetabular posterior wall fracture and its internal fixation. Methods Contact areas and contact stress of normal acetabulum group,acetabular postenor wall fracture group and two methods of internal fixation groups （reconstruction plate alone and spike plate with reconstruction plate） were measured by the application of pressure film, respectively. Results Compared with normal acetabulum group, contact area of acetabular posterior wall fracture group decreased by 34%, and recovered by 82% with reconstruction plate alone, and which spike plate group regained 92% contact area. Acetabular contact pressure and contact stress both increased obviously in acetabular posterior wall fracture group, and showed decrease after the fractures were fixed by the two internal fixation methods. Conclusions Contact areas of acetabular posterior wall fracture group greatly decreased to cause stress concentration. Two methods of internal fixation effectively made the acetabular contact areas recovered and reduced contact stress. Spike plate group were more effective compared to reconstruction plate alone group.
出处
《医用生物力学》
EI
CAS
CSCD
2007年第3期306-309,共4页
Journal of Medical Biomechanics
关键词
髋臼骨折
内固定
生物力学特征
Acetabular fracture
Internal fixation
Biomechanics characteristics
