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Article |
1 Department of Orthopaedic Surgery, Christian-Albrechts-University Kiel, Germany
2 Department of Trauma, Hand and Reconstructive Surgery, Wilhelms-University, Muenster, Germany
* To whom correspondence should be addressed.
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Abstract |
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Background: The newest generation of meniscus repair devices is designed to combine the benefits of the all-inside technique with the biomechanical properties of sutures.
Hypothesis: New flexible all-inside suture anchors have better fixation strength than rigid anchors, but there is no difference when compared to conventional horizontal and vertical mattress sutures.
Study Design: Controlled laboratory study.
Methods: In fresh-frozen bovine menisci, initial fixation strength, stiffness, and failure mode of different meniscus fixation techniques (FasT-Fix, RapidLoc, Meniscus Arrow, horizontal and vertical 2.0 Ethibond sutures) were evaluated in a computer-based materials testing machine at a rate of 12.5 mm/sec.
Results: The vertical and horizontal FastT-Fix suture anchors were the strongest devices with regard to pullout strength, with no significant difference compared to the vertical 2-0 Ethibond sutures. Horizontal sutures, Meniscus Arrow, and RapidLoc had significantly lower pullout strength. Vertical and horizontal FastT-Fix suture anchors showed significantly higher stiffness than the other devices.
Conclusions: Biomechanical properties of flexible all-inside meniscus anchors (FasT-Fix) are comparable to conventional vertical suture techniques. Characteristics of the flexible RapidLoc are comparable to rigid anchors (Meniscus Arrow).
Clinical Relevance: From the biomechanical point of view, flexible all-inside meniscus refixation devices are an alternative to conventional suture techniques and rigid meniscus anchors.
Key Words: meniscus fixation techniques, meniscus anchors, biodegradable implants, biomechanics, bucket-handle tear
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H. C. Chang, J. Nyland, D. N. M. Caborn, and R. Burden Biomechanical Evaluation of Meniscal Repair Systems: A Comparison of the Meniscal Viper Repair System, the Vertical Mattress FasT-Fix Device, and Vertical Mattress Ethibond Sutures Am. J. Sports Med., December 1, 2005; 33(12): 1846 - 1852. [Abstract] [Full Text] [PDF]
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T. Zantop, A. K. Eggers, V. Musahl, A. Weimann, and W. Petersen Cyclic Testing of Flexible All-Inside Meniscus Suture Anchors: Biomechanical Analysis Am. J. Sports Med., March 1, 2005; 33(3): 388 - 394. [Abstract] [Full Text] [PDF]
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