实验性跟腱横断损伤2种缝合技术初始力学性能的比较

摘要

Objective To investigate the initial biomechanical performance of the Krackow and Kessler sutrue techniques in tran sected tendons. Methods 25 fresh porcine tendons of flexor digitorum longus were harvested and devided into three groups(single Kessler,single Krackow and blank);transection were executed to all specimens in the mid region of tendons to stimulate rupures;Ti-Cron No. 5 polyester sutures were used to perform repaires for each technique. All tendons were mounted in a material testing machine and loaded to failure at a constant speed;load strain data was recorded as well as the failure types. Results The failure load and stiffness of the Krackow group were significantly higher than those in the Kessler group, with the deformation ratio lower than the latter. Conclusion The Krackow technique has better biomechanical performance than the Kessler, providing a more stable fixation to the repaired tendon.%目的 比较实验性跟腱横断损伤Krackow法与Kessler法缝合术后的初始力学性能.方法 选用25条新鲜正常成年猪趾长屈肌腱标本,随机分为Krackow组、Kessler组及空白对照组;分别采用上述2种缝合技术以Ti.Cron 5号聚酯缝线缝合横断的肌腱;将缝合标本于万向材料测试机匀速拉伸至缝合失效,记录标本载荷-形变数据及失效方式.结果 Krackow组失效载荷、刚度均高于Kessler组(P＜0.05),失效形变率均低于Kessler组(P＜0.05).结论 Krackow氏缝合法的初始力学性能优于Kessler氏缝合法,可为术后跟腱修复提供较稳定的早期固定.