Department of Sports Medicine, Huashan Hospital, Fudan University, Wulumuqi Middle Road No. 12, Shanghai, China.
Knee Surg Sports Traumatol Arthrosc. 2018 Dec;26(12):3606-3610. doi: 10.1007/s00167-018-4864-z. Epub 2018 Feb 14.
To compare the effect of two interference screw insertion angles on the biomechanical properties of the insertional Achilles tendon (IAT) reconstruction.
Nine matched pairs of fresh-frozen human cadaveric Achilles tendon specimens were randomized to two groups with interference screw insertion angles of 60° and 120°. The IAT reconstruction was performed by fixing the graft tendon with the interference screw. Each specimen was loaded to failure. The load at failure, stiffness, and mode of failure were documented. Differences in load at failure and stiffness were analysed.
There was no statistically significant difference between the 60° and 120° groups for failure load (149.137 ± 20.836 versus 155.428 ± 28.343 N, respectively, n.s.) and stiffness (14.523 ± 2.824 N/mm versus 14.727 ± 2.192 N/mm, respectively, n.s.). The most common mode of failure was the graft pulling out of the bone tunnel when the screw broke.
Graft fixation at two different interference screw insertion angles for IAT reconstruction exhibited equivalent biomechanical performance. When performing this procedure, surgeons may choose the interference screw insertion angle based on personal preference.
比较两种干扰螺钉插入角度对跟腱插入部（IAT）重建的生物力学性能的影响。
将 9 对匹配的新鲜冷冻人尸体跟腱标本随机分为两组，干扰螺钉插入角度分别为 60°和 120°。用干扰螺钉固定移植物肌腱进行 IAT 重建。对每个标本进行加载直至失效。记录失效时的载荷、刚度和失效模式。分析失效载荷和刚度的差异。
在失效载荷（分别为 149.137 ± 20.836 N 和 155.428 ± 28.343 N，n.s.）和刚度（分别为 14.523 ± 2.824 N/mm 和 14.727 ± 2.192 N/mm，n.s.）方面，60°和 120°两组之间没有统计学上的显著差异。最常见的失效模式是螺钉断裂时移植物从骨隧道中拔出。
在 IAT 重建中，采用两种不同的干扰螺钉插入角度进行移植物固定，其生物力学性能相当。在进行该手术时，外科医生可以根据个人喜好选择干扰螺钉插入角度。
