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[目的]探讨腘绳肌腱移植重建ACL股骨与胫骨侧采用不同固定方式的生物力学特性.[方法]采用新鲜冷冻尸体膝关节标本,腘绳肌腱移植,股骨侧分别用Endobutton(n=8)、Rigidfix(n=8)、肌腱结(n=8)和界面螺钉固定(n=8).胫骨端采用可吸收界面螺钉(n=7)和Intrafix(n=7)固定,模拟ACL重建.进行循环载后位移、抗拉刚度、失效载荷、最大载荷等生物力学.[结果]失效载荷和最大载荷:Endobutton>Rigidfix>肌腱结>界面螺钉固定法,差异有统计学意义(PEndobutton.循环载荷位移:肌腱结固定组>Rigidtlx固定组>Endobutton固定组>界面螺钉固定组.胫骨端最大载荷:Intrafix固定组>可吸收界面螺钉组,两者之间差异有统计学意义(P0.05).[结论]采用Endobutton、Rigidfix、intrafix、肌腱结和界面螺钉ACL重建固定均可满足力学需求;Rigidfix和Intrafix固定系统较界面螺钉固定更具有生物力学优势.“,”[Objective]To analyze the biomechanics of different internal fixations with Chinese hamstring tendon in anterior cruciate ligament(ACL) reconstruction. [Method]Reconstruction models of ACL were established in human cadaver knee joint and randomly divided into different groups according to different materials: Endobutton (n=8), Rigidfix (n=8), Hamstring tendon knot (n=8), Interface absorbable screw (n=8) in femoral side. Interface absorbable screw (n=7) and Intrafix (n=7) in tibial side. The stiffness, max loading, failure loading, displacement loading were tested after cycling loading. [Result]Failure and max loading: Endobntton > Rigidfix > Hamstring tendon knot > interface screw, with significant differences (P Interface screw > Endobutton. Displacement: Hamstring tendon knot > Rigidfix > Endobutton > interface screw.Max loading in tibial side: lntrafix > interface screw, with significant difference (P 0.05). [Conclusion]All internal fixations in this study could meet biomechanical re-quirement, but Rigidfix and lntrafix showed more advantages.