胫骨远端解剖钢板治疗不稳定性Pilon骨折的生物力学研究

目的：从生物力学角度探讨新型胫骨远端解剖铜板的力学性能。方法：将12具新鲜湿润成人踝关节标本，随机区组分为4组（每组3具），3具正常胫骨作为对照（正常N组），9具造成胫骨远端不稳定性Pilon骨折，分别采用新型胫骨远端解剖钢板固定（A组）、重建铜板固定（B组）、三叶草钢板固定（C组），B、C两组为对照组，测试各组的远端轴向抗压强度、远端轴向刚度、扭转生物力学性能、胫距关节面接触特征。结果：A组在胫骨远端不稳定性Pilon骨折的远端轴向抗压强度、远端轴向刚度、扭转生物力学性能以及胫距关节面接触特征上接近正常N组（P〉0．05），优于B、C组（P〈0．05）。结论：新型胫骨远端解剖钢板固定后比较牢固，能达到胫骨远端不稳定性Pilon骨折稳定、可靠的固定目的。

Biomechanical research in treating unstable Pilon fracture with anatomic plate of distal tibia

Objective: To investigate the mechanical characteristics of new anatomic plate of distal tibia from view of biomechanics. Methods: Twelve fresh adult moist ankle specimens were randomly divided into four block groups (every group had 3 speciments),3 tibial specimens as a normal control(normal group N),9 specimens were resulted in unstable distal tibial Pilon fracture. Using steel plate fixation with a new anatomic distal tibial plate(group A),reconstruction plate(group B),clover plate(group C). Group B and group C as control group to test the remote axial compressive strength,remote axial stiffness,reversing biomechanical properties,contacted characteristics of the tibial astragaloid articular surface. Results: The remote axial compressive strength,remote axial stiffness,reversing biomechanical properties,contacted characteristics of tibial astragaloid articular surface the in distal tibial Pilon fracture instability of group A were near normal group N(P>0.05). Group A was best than group B and C(P<0.05). Conclusion: The new anatomic plate of distal tibia was relatively strong,which can reach effective and stable fixation for unstable distal tibial Pilon fracture.