Kousa P, Järvinen T L, Pohjonen T, Kannus P, Kotikoski M, Järvinen M
University Hospital, Tampere, Finland.
J Bone Joint Surg Br. 1995 Nov;77(6):901-5.
We compared the strength of fixation of a biodegradable screw with that of two metal screws in a bone-patellar-tendon-bone (BPTB) graft in the bovine knee. We used 33 fresh BPTB specimens with a circular tibial bone plug of 9 mm in diameter which were anchored in a tibial metaphyseal bone tunnel with either an interference screw (n = 11), an AO cancellous screw (n = 11) or a fibrillated, self-reinforced biodegradable poly-L-lactide screw (n = 11). The mean force to failure (+/- SD) in the three groups was 1358 +/- 348 N, 1081 +/- 331 N and 1211 +/- 362 N, respectively. There was no significant difference in the groups with regard to the linear load or the elastic moduli of the fixation. We conclude that the biodegradable screw is as good as either of the two metal screws in the fixation of a BPTB graft in the bovine knee and can be recommended for ACL reconstruction using this type of graft.
我们比较了可生物降解螺钉与两种金属螺钉在牛膝关节骨-髌腱-骨（BPTB）移植物中的固定强度。我们使用了33个新鲜的BPTB标本，其带有直径为9毫米的圆形胫骨骨栓，这些标本分别用干涉螺钉（n = 11）、AO松质骨螺钉（n = 11）或纤维状、自增强可生物降解聚-L-丙交酯螺钉（n = 11）固定于胫骨干骺端骨隧道中。三组的平均失效力（±标准差）分别为1358±348 N、1081±331 N和1211±362 N。在固定的线性载荷或弹性模量方面，各组之间没有显著差异。我们得出结论，在牛膝关节BPTB移植物的固定中，可生物降解螺钉与两种金属螺钉中的任何一种一样好，可推荐用于使用此类移植物的前交叉韧带重建。
