新型与传统接骨板固定股骨远端骨折的生物力学比较

Comparison of Biomechanics between New and Traditional LCP Fixation of Distal Femoral Fractures

对比新型与传统接骨板(Locking Compression Plate,LCP)固定股骨远端骨折的生物力学情况,为选择接骨板提供理论依据。应用有限元分析选择步态运动时的载荷作为约束条件,分析接骨板的变形、应力及骨痂的变形情况,发现在步态情况下,传统接骨板的最大应力是新型的1.8倍,最大变形是新型的2.9倍。使用新型接骨板固定股骨远端骨折失效性远小于传统LCP,拥有更好的生物力学性能。

Objective To compare the biomechanics of locking compression plate(LCP) for distal femoral fracture and provide theoretical basis for the selection of locking compression plate. Methods Finite element analysis was used to analyze the deformation, stress and callus deformation of the bone plate. Results Under the condition of gait, the maximum stress and deformation of the traditional plate were 1.8 times and 2.9 times higher than that of the new one. Conclusion The failure rate of the new plate is much lower than that of the traditional LCP, and it has better biomechanical properties.