Yu Jiong, Mi Jingyi, Huang Kai, Qi Renfei
Department of Sports Medicine, Wuxi Ninth People's Hospital Affiliated to Soochow University, Liangxi Road, No 999, Binhu District, Wuxi, Jiangsu, China.
Orthopaedic Institute, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi, Jiangsu, China.
J Orthop Surg Res. 2025 Apr 7;20(1):348. doi: 10.1186/s13018-025-05757-5.
Suture and knotless anchor onlay tenodesis are two common treatments for biceps lesions; however, there is a paucity of biomechanical studies evaluating the efficacy and structural integrity of these techniques.
Tendons were harvested from four lower extremity fresh cadaver specimens, including the extensor digitorum longus, peroneus longus, peroneus brevis, and anterior tibialis tendons. Each tendon diameter was recorded using a digital Vernier caliper. Sixteen 3D printed proximal humeri models were allocated to either the single lasso loop with suture anchor (SLL) group or the whipstitch with knotless suture anchor (WSA) group. Each tenodesis model was initially tested on an electrodynamic material testing instrument under a cyclic load ranging from 5 to 70 N at a speed of 1.25 mm/s. The force on the tendon was then returned to 5 N, which was pulled until the ultimate failure of the construct. Displacement during cyclic loading, ultimate failure load, stiffness, and failure modes were assessed.
Fourteen tenodesis models were validated, and two models were discarded due to technical errors. No significant differences between the two groups were observed regarding tendon diameter, ultimate failure load, and displacement at ultimate failure load. However, the construct stiffness for the SLL group was lower than that of the WSA group (58.02 ± 5.62 N/mm vs. 72.24 ± 15.63 N/mm, P = 0.043).
The SLL group had a lower construct stiffness than the WSA group, whereas construct displacement and ultimate failure load were similar in both groups. Therefore, SLL biceps tenodesis may offer a convenient alternative, with lower tendon migration fixation, while performing an arthroscopic biceps tenodesis.
Basic Science Study.
缝线和无结锚钉覆盖式肌腱固定术是肱二头肌损伤的两种常见治疗方法；然而，评估这些技术的疗效和结构完整性的生物力学研究较少。
从四个下肢新鲜尸体标本中获取肌腱，包括趾长伸肌、腓骨长肌、腓骨短肌和胫骨前肌腱。使用数字游标卡尺记录每条肌腱的直径。将16个3D打印的近端肱骨模型分配到单环套缝线锚钉（SLL）组或连续缝合法无结缝线锚钉（WSA）组。每个肌腱固定模型最初在电动材料测试仪器上进行测试，在5至70 N的循环载荷下以1.25 mm/s的速度加载。然后将肌腱上的力恢复到5 N，持续牵拉直至结构最终失效。评估循环加载过程中的位移、最终失效载荷、刚度和失效模式。
14个肌腱固定模型得到验证，2个模型因技术错误被丢弃。两组在肌腱直径、最终失效载荷和最终失效载荷下的位移方面未观察到显著差异。然而，SLL组的结构刚度低于WSA组（58.02±5.62 N/mm对72.24±15.63 N/mm，P = 0.043）。
SLL组的结构刚度低于WSA组，而两组的结构位移和最终失效载荷相似。因此，在进行关节镜下肱二头肌肌腱固定术时，SLL肱二头肌肌腱固定术可能是一种更便捷的选择，肌腱移位固定较低。
基础科学研究。
