Orthopedic Research Unit, Hospital Unit West, Laegaardvej 12, 7500, Holstebro, Denmark.
Knee Surg Sports Traumatol Arthrosc. 2010 Jun;18(6):742-6. doi: 10.1007/s00167-009-0922-x. Epub 2009 Sep 26.
The hamstring tendon graft has become increasingly popular in anterior cruciate ligament reconstruction because of low donor-site morbidity. However, the tibial fixation is considered difficult, mainly because of low tibial mineral bone density. Therefore, we tested whether preparation of the tibial tunnel with compaction by serial dilation provided a stronger anchorage of the graft-fixation-device complex than does traditional extraction drilling of the tibial tunnel. In 20 bovine tibiae, the bone tunnels were created with either extraction drilling (group 1) or compaction by serial dilation (group 2). Twenty bovine digital extensor tendons were fixated in the bone tunnel with an Intrafix tibial fastener. The graft-fixation-device complexes were mounted in a hydraulic test machine. The fixation strength was evaluated after cyclic loading. The difference between the serial dilation group and the extraction drilling group ranged from a mean slippage of 0 mm at 70-220 N, to a mean slippage of 0.1 mm at 70-520 N. We found no significant difference in slippage of the graft-fixation-device complex after 1,600 cycles. This study failed to show a significant difference between compaction by serial dilation and extraction drilling of the tibia bone tunnel in anterior cruciate ligament reconstruction.
跟腱移植物在 ACL 重建中越来越受欢迎，因为它的供体部位发病率低。然而，胫骨固定被认为是困难的，主要是因为胫骨的矿化骨密度低。因此，我们测试了用连续扩张法制备胫骨隧道是否比传统的胫骨隧道提取钻孔法能为移植物固定装置提供更强的固定。在 20 个牛胫骨中，使用提取钻孔法（第 1 组）或连续扩张法（第 2 组）制备骨隧道。用 Intrafix 胫骨紧固件将 20 个牛数字伸肌腱固定在骨隧道中。将移植物固定装置复合物安装在液压试验机上。在循环加载后评估固定强度。在 70-220 N 时，从平均滑动 0 毫米到 70-520 N 时平均滑动 0.1 毫米，连续扩张组与提取钻孔组之间的差异。在 1600 次循环后，移植物固定装置复合物的滑动没有明显差异。本研究未能显示 ACL 重建中胫骨隧道的压缩与提取钻孔之间存在显著差异。
