基于有限元分析方法的Vancouver B1型假体周围骨折内固定方式的比较

发布时间：2019-01-01 21:17

【摘要】：[目的]用有限元方法研究人工髋关节置换术后Vancouver B1型股骨假体周围骨折不同内固定方式的稳定性及生物力学情况。[方法]模拟人工髋关节置换术后Vancouver B1型股骨假体周围骨折,并模拟不同方式的锁定钛板螺钉内固定术,模拟部分负重及完全负重情况对装配体施加载荷,并进行组间比较。[结果]随着钛板及螺钉数量增加,骨折端位移减小,内固定稳定性增加,钛板上分布的Von Mises应力峰值逐渐减小,单八孔钛板、单十孔钛板及双八孔钛板固定组间比较差异有统计学意义,但双十孔钛板与双八孔钛板固定组间比较差异无统计学意义;同时,假体上分布的Von Mises应力峰值逐渐增大,但各组间比较均差异无统计学意义。[结论]对于Vancouver B1型股骨假体周围骨折,若采用锁定钛板螺钉内固定方式进行治疗,双重钛板可比单一钛板提供更高的稳定性,同时使得钛板上分布的应力峰值减低,但过长的双重钛板(双十孔)并无必要。
[Abstract]:[objective] to study the stability and biomechanics of different internal fixation methods for periprosthetic fracture of Vancouver B1 femur after hip arthroplasty by finite element method. [methods] to simulate the periprosthetic fracture of Vancouver B1 femur after artificial hip arthroplasty, and to simulate the internal fixation of different locking titanium plate screws, and to simulate the loading of partial and complete load on the assembly, and to compare the results among groups. [results] with the increase of the number of titanium plates and screws, the displacement of the fracture end decreased, the stability of internal fixation increased, the peak value of Von Mises stress distributed on the titanium plate gradually decreased, and the titanium plate with single and eight holes decreased. There was significant difference between single and double eight-hole titanium plate fixation groups, but there was no significant difference between double-ten-hole titanium plate and double-eight-hole titanium plate fixation group. At the same time, the peak value of Von Mises stress on the prosthesis gradually increased, but there was no significant difference among the groups. [conclusion] for the periprosthetic fracture of Vancouver B1 femur, if the locking titanium plate screw is used to treat the fracture, the double titanium plate can provide higher stability than the single titanium plate, and the peak stress distribution on the titanium plate can be reduced at the same time. But long double titanium plate (double ten holes) is not necessary.
【作者单位】：中国石油天然气集团公司中心医院骨科;中国石油天然气集团公司中心医院介入科;
【分类号】：R687

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