Fattahi Bafghi Mojtaba, Baniassadi Majid, Baghani Mostafa, Sharafatvaziri Arash, Esfandiari Soodabeh, Shayan-Moghadam Ramin, Keyhani Sohrab, Karimpour Morad, George Daniel
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran.
Center for Orthopedic Trans-Disciplinary Applied Research, Tehran University of Medical Sciences, Tehran, Iran.
Ann Biomed Eng. 2025 May 9. doi: 10.1007/s10439-025-03748-5.
The meniscus is a collagenous and elastic tissue that plays a crucial role in preventing wear and tear within the knee joint. Meniscus root tears are a common knee pathology that can significantly impact joint function. One of the prevalent surgical techniques for repairing meniscus root tears is the transtibial pull-out method, favored by many orthopedic surgeons. It is essential to consider that displacement of the meniscus root and inadequate stabilization during the rehabilitation period are likely contributing factors to the failure of meniscus root repair outcomes. Understanding these challenges is vital for improving surgical techniques and postoperative care to enhance patient recovery and joint stability.
Meniscal root tears pose a significant challenge in orthopedics, disrupting the delicate mechanics of the knee. This study introduces a novel self-tension screw designed for meniscal root repair, addressing the limitations associated with traditional screws.
14 Bovine cadaveric specimens were employed to conduct biomechanical evaluations and compare the new self-tension screw with a conventional washer screw system used in these surgeries.
From cyclic loading tests, comparable displacement trends are observed 3.092 ± 0.258 mm in Self-tension screw group and 2.629 ± 0.727 mm in Washer screw. load-to-failure assessments demonstrated superior tolerance in the washer screw by 391.34 ± 60.203 N that is significantly better than the self-tension screw group with a load tolerance of 136.58 ± 25.48 N. Stiffness analyses indicated greater structural stability in the washer screw (22.77 ± 4.234) over self-tension screw (15.2 ± 4.89).
The innovative self-tension mechanism of the screw, generating tension during bone channel engagement, suggests a potential breakthrough in addressing manual tensioning challenges.
半月板是一种胶原弹性组织，在防止膝关节磨损方面起着关键作用。半月板根部撕裂是一种常见的膝关节病变，会对关节功能产生重大影响。修复半月板根部撕裂的一种常用手术技术是经胫骨拉出法，受到许多骨科医生的青睐。必须考虑到，半月板根部移位以及康复期间固定不足可能是导致半月板根部修复结果失败的因素。了解这些挑战对于改进手术技术和术后护理以提高患者恢复和关节稳定性至关重要。
半月板根部撕裂在骨科领域是一项重大挑战，会破坏膝关节的精细力学结构。本研究引入了一种专为半月板根部修复设计的新型自张紧螺钉，以解决与传统螺钉相关的局限性。
使用14个牛尸体标本进行生物力学评估，并将新型自张紧螺钉与这些手术中使用的传统垫圈螺钉系统进行比较。
在循环加载测试中，自张紧螺钉组的位移趋势为3.092±0.258毫米，垫圈螺钉组为2.629±0.727毫米。失效载荷评估表明，垫圈螺钉的耐受性更强，为391.34±60.203牛，明显优于自张紧螺钉组，其载荷耐受性为136.58±25.48牛。刚度分析表明，垫圈螺钉（22.77±4.234）的结构稳定性高于自张紧螺钉（15.2±4.89）。
螺钉的创新自张紧机制在骨通道接合过程中产生张力，这表明在解决手动张紧挑战方面可能取得突破。
