ArticleAnnals of biomedical engineering2025
A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes.
Article in Annals of biomedical engineering, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe 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. PURPOSE: 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.
methods14 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.
resultsFrom 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).
conclusionThe innovative self-tension mechanism of the screw, generating tension during bone channel engagement, suggests a potential breakthrough in addressing manual tensioning challenges.
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