运动对制动后兔膝内侧副韧带影响的观察

Effects of mobilization on immobilized medial collateral ligament of rabbits

选用１８ 只大白兔，６ 只膝关节内固定８ 周后主动活动８ 周，另６ 只内固定８ 周后被动＋ 主动活动８周。取内侧副韧带进行生物力学试验和形态学观察。结果显示：活动８ 周，内侧副韧带的结构特性指标较对侧和正常组小，与对侧无显著性差异，与正常组有显著性差异，而内侧副韧带的材料特性指标与对侧和正常组相似。活动后，胶原纤维的排列近似正常，韧带骨止点的溶骨性吸收无显著变化。在断裂方式上，已出现其他部位的断裂。这些结果提示韧带物质的材料特性比结构特性恢复更快。

This paper is on effect of mobilization on immobilized ligament.Eighteen rabbits were divided into three groups.Group Ⅰ,eight weeks of active movement;group Ⅱ,eight weeks of passive+active movement;group Ⅲ,age matched normal control.The biomechanical testing,histological and ultrastructural evaluation were used.Results:with mobilization,the structural properties of ligament bone complexs of MCL obviously improved but did not return to normal.The material properties of MCL was similar to those of contralateral and normal control.Arrangement of collagen fibers was similar to that of normal.Resorption of bone in ligament bone insertion sites was not significantly changed.Through mobilization following immobilization,failure location of MCL changed.Conclusion:The recovery of material properties of ligament substance was more quick than that of structural properties of ligament bone complexs.The effect of active movement and passive +active movement on recovery of structure of immobilized ligament was similar.