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연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제55권 제3호
발행연도
2014.1
수록면
760 - 765 (6page)

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Purpose: The use of graft tissue fixation using bioabsorbable interference screws (BISs) in anterior cruciate ligament (ACL) reconstruction offers various advantages, but limited pullout strength. Therefore, additional tibial fixation is essential for aggressiverehabilitation. We hypothesized that additional graft tissue fixation using bioabsorbable suture anchors (BSA) would provide sufficient pull-out strength. Materialsand Methods: Twenty four fresh frozen porcine distal femur and patellar tendon preparations were used. All specimens were divided into three groups based on additional fixation methods: A, isolated BIS; B, BIS and BSA; and C, BIS and post cortical screw. Tensile testing was carried out under an axial load. Ultimate failureload and ultimate failure load after cyclic loading were recorded. Results: The ultimate failure loads after load to failure testing were 166.8 N in group A, 536.4 N in group B, and 438 N in group C; meanwhile, the ultimate failure loads after load to failure testing with cyclic loading were 140 N in group A, 466.5 N in group B, and 400 N in group C. Stiffness after load to failure testing was 16.5 N/mm in group A, 33.5 N/mm in group B, and 40 N/mm in group C. An additional BSA fixation resultedin a significantly higher ultimate failure load and stiffness than isolated BIS fixation, similar to post screw fixation. Conclusion: Additional fixation using a BSA provided sufficient pullout strength for ACL reconstruction. The ultimate failureload of the BSA technique was similar to that of post cortical screws.

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