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目的：探讨兔挛缩膝关节髌韧带的应力松弛和蠕变特性，为临床治疗提供理论依据。方法：将兔膝关节伸直位制动６周，复制伸直型挛缩膝关节模型，然后分别在３７℃、４２℃的条件下，对正常组和制动组髌韧带行应力松弛和蠕变试验。结果：正常组和制动组髌韧带均表现出较明显的应力松弛和蠕变现象；无论是正常组还是制动组，３７℃和４２℃之间髌韧带的最大应力松弛率、最大蠕变率均无显著性差异（Ｐ＞００５），制动组４２℃时髌韧带的最大蠕变率较正常组４２℃有显著性增加（Ｐ＜００１）。结论：髌韧带的这种应力松弛和蠕变特性可从机理上解释牵引、夹板等疗法在挛缩关节康复治疗中的有效性；３７℃和４２℃的温差对髌韧带的最大应力松弛率和最大蠕变率均无显著性影响
Objective: To investigate the stress relaxation and creep characteristics of patellar ligament in rabbit contracture knee joint, and to provide a theoretical basis for clinical treatment. Methods: The knee extension of knee joint was braked for 6 weeks, and the model of straight knee contracture was replicated. Then the stress relaxation and creep of the patellar tendon in normal group and brake group were performed at 37 ℃ and 42 ℃ respectively test. Results: The patellar ligament of the normal group and the brake group showed obvious stress relaxation and creep. The maximum stress relaxation rate and the maximum creep of patellar ligament between 37 ℃ and 42 ℃ (P> 005). The maximal creep rate of patellar tendon in brake group at 42 ℃ was significantly higher than that in normal group at 42 ℃ (P <001). CONCLUSION: The stress relaxation and creep characteristics of patellar ligament can explain the effectiveness of traction, splint and other therapies in the treatment of contracture joint. The maximum stress relaxation rate of patellar ligament at 37 ℃ and 42 ℃ is the largest Creep rate had no significant effect