A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes

A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes Publisher

Fattahi Bafghi M¹ ; Baniassadi M¹ ; Baghani M¹ ; Sharafatvaziri A² ; Esfandiari S³ ; Shayanmoghadam R³ ; Keyhani S⁴ ; Karimpour M¹ ; George D⁵

Show Affiliations

1. School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
2. Center for Orthopedic Trans-Disciplinary Applied Research, Tehran University of Medical Sciences, Tehran, Iran
3. Department of Orthopedic Surgery, Shariati Hospital, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
4. Bone Joint and Related Tissues Research Center, Akhtar Orthopedic Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
5. University of Strasbourg, CNRS, ICube, Strasbourg, France

Source: Annals of Biomedical Engineering Published:2025

Abstract

Background: 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. 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. Methods: 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. Results: 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). Conclusion: The innovative self-tension mechanism of the screw, generating tension during bone channel engagement, suggests a potential breakthrough in addressing manual tensioning challenges. © The Author(s) under exclusive licence to Biomedical Engineering Society 2025.

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Style	Citing Format
MLA	Fattahi Bafghi M, et al.. "A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes." Annals of Biomedical Engineering, vol. , no. , 2025, pp. -.
APA	Fattahi Bafghi M, Baniassadi M, Baghani M, Sharafatvaziri A, Esfandiari S, Shayanmoghadam R, Keyhani S, Karimpour M, George D (2025). A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes. Annals of Biomedical Engineering, (), -.
Chicago	Fattahi Bafghi M, Baniassadi M, Baghani M, Sharafatvaziri A, Esfandiari S, Shayanmoghadam R, Keyhani S, Karimpour M, George D. "A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes." Annals of Biomedical Engineering , no. (2025): -.
Harvard	Fattahi Bafghi M et al. (2025) 'A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes', Annals of Biomedical Engineering, (), pp. -.
Vancouver	Fattahi Bafghi M, Baniassadi M, Baghani M, Sharafatvaziri A, Esfandiari S, Shayanmoghadam R, et al.. A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes. Annals of Biomedical Engineering. 2025;():-.
BibTex	@article{ author = {Fattahi Bafghi M and Baniassadi M and Baghani M and Sharafatvaziri A and Esfandiari S and Shayanmoghadam R and Keyhani S and Karimpour M and George D}, title = {A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes}, journal = {Annals of Biomedical Engineering}, volume = {}, number = {}, pages = {-}, year = {2025} }
RIS	TY - JOUR AU - Fattahi Bafghi M AU - Baniassadi M AU - Baghani M AU - Sharafatvaziri A AU - Esfandiari S AU - Shayanmoghadam R AU - Keyhani S AU - Karimpour M AU - George D TI - A Self-Tension Screw for Meniscal Root Repair: Biomechanical Properties and Design Considerations for Optimal Outcomes JO - Annals of Biomedical Engineering VL - IS - SP - EP - PY - 2025 ER -

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