腓骨头复合组织瓣切取后膝关节生物力学的稳定性

背景：股二头肌腱和外侧副韧带是膝关节后外侧复合体的重要组成成分,对维持膝关节后外侧稳定性有重要意义。 目的：观察腓骨头复合组织瓣切取后供区股二头肌腱和外侧副韧带下止点重建对膝关节稳定性的影响。 方法：选择10例男性新鲜冷冻膝关节尸体标本,利用生物力学扭转试验机测量腓骨头复合组织瓣切取前及股二头肌腱和外侧副韧带下止点重建后不同转矩下的胫骨外旋角。 结果与结论：同一转矩条件下,胫骨外旋角随膝关节屈曲角度的增大而变大,腓骨头复合组织瓣切取前及股二头肌腱和外侧副韧带下止点重建后比较差异无显著性意义;不同外旋转距条件下,外旋角变化的趋势一致。提示腓骨头复合组织瓣切取后,妥善重建股二头肌腱和外侧副韧带下止点,不会对膝关节稳定性造成显著影响。

Biomechanical stability of the knee joint after fibula head composite flap surgery

BACKGROUND:Biceps femoris tendon and lateral collateral ligament are two important components of the knee posterolateral complex, and play important roles in maintaining the stability of knee posterolateral complex. OBJECTIVE:To study the impact of biceps femoris tendon and lateral collateral ligament attachment point reconstruction on the stability of the knee joint after the fibula head composite flap surgery. METHODS:Ten cases of male fresh frozen knee cadaver specimens were selected; biomechanical torsion testing machine was used to measure the tibial external rotation angle at different torques before fibula head composite flap surgery and after biceps femoris tendon and lateral collateral ligament attachment point reconstruction. RESULTS AND CONCLUSION:Under the condition of the same torque, the tibial external rotation angle was increased with extension of knee flexion angle, and there was significant difference of the tibial external rotation angle before fibula head composite flap surgery and after biceps femoris tendon and lateral collateral ligament attachment point reconstruction; under the condition of the different torques, there was a positive correlation between external rotation angle and knee flexion angle. After the fibula head composite flap surgery, biceps femoris tendon and lateral collateral ligament attachment point reconstruction will not influence the stability of the knee joint.