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題名 | Central and Eccentric Position of Screw Fixation for Tendon Graft in Anterior Cruciate Ligament Reconstruction: A Biomechanical Study Using Porcine Tibial Bone=以可吸收之介面鏍絲中心性或偏心性固定前十字韌帶重建術之韌帶植入物--使用豬膝關節之生物力學研究 |
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作者 | 李建和; 邱煥民; 楊經偉; 吳興盛; | 書刊名 | Journal of Medical Sciences |
卷期 | 23:5 2003.10[民92.10] |
頁次 | 頁271-275 |
分類號 | 416.61 |
關鍵詞 | 前十字韌帶重建術; Anterior cruciate ligament; Central; Eccentric; Interference screw; |
語文 | 英文(English) |
英文摘要 | Background: The purpose of this study was to determine initial fixation strength of tendon grafts fixed by biodegradable interference screws (BISs) in different location for anterior cruciate ligament (ACL) reconstruction. Methods: This biomechanical study compared elongation after cyclic loading (1000 cycles under 150N), initial pullout force, yields force, and stiffness of porcine flexor digitorum profundus tendon grafts repaired by a 2-strand technique in 20 porcine tibiae using centrically or eccentrically placed BIS (BioRCI screw, Smith & Nephew, USA). The tendon was looped around a steel pin on the top end, and the lower end was fixed proximally within an 8-mm tibial tunnel. Results: (1) Elongation of tendon grafts following cyclic loading was significantly less amount in central position (8.71±2.91mm) than in eccentric position of the screw (11.112.15mm) (P<0.05). (2) Maximum pullout force, yield force, and stiffness of the central position (540.7±135 N, 510.1±121.1 N, 91.3±12.2 N/mm, respectively) were significantly higher than the eccentric position of the screw (372±90 N, 362.3±78.5 N, 71.2±21.1 N/mm) (P<0.05). Conclusions: For tendon graft fixation in ACL reconstruction, placement of interference screw in central position has better initial fixation strength than in eccentric position. |
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