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用于前交叉韧带重建的软组织股骨固定装置的力学性能

Mechanical properties of soft tissue femoral fixation devices for anterior cruciate ligament reconstruction.

作者信息

Ahmad Christopher S, Gardner Thomas R, Groh Megan, Arnouk Johnny, Levine William N

机构信息

Center for Shoulder, Elbow, and Sports Medicine, Department of Orthopaedic Surgery, Columbia University, New York, New York 10032, USA.

出版信息

Am J Sports Med. 2004 Apr-May;32(3):635-40. doi: 10.1177/0363546503261714.

DOI:10.1177/0363546503261714
PMID:15090378
Abstract

PURPOSE

To evaluate femoral soft tissue fixation for anterior cruciate ligament reconstruction.

HYPOTHESIS

Femoral fixation devices have different ultimate strengths and slippage under cyclic loading.

STUDY DESIGN

Controlled laboratory study.

METHODS

Thirty-three porcine femora were used to study interference screw (9), Endobutton (8), Rigidfix cross-pin (8), and Bio-Transfix cross-pin (8) fixation methods. Fixation slippage was evaluated under cyclical load from 50 N to 250 N using a materials testing machine. Ultimate load was determined with a single load to failure.

RESULTS

Total graft slippage was greater (P <.001) for the Rigidfix (6.02 +/- 2.12 mm) and the interference screw (5.44 +/- 3.25 mm) compared to the Endobutton (1.75 +/- 0.97 mm) and the Bio-Transfix (1.14 +/- 0.53 mm). All techniques showed the greatest slippage during the first 100 cycles (Rigidfix 84%, Endobutton 70%, interference screw 56%, and Bio-Transfix 55%). The failure load for the interference screw technique (539 +/- 114 N) was lower (P =.0008) than for the other 3 techniques (737 +/- 140 N for Rigidfix, 746 +/- 119 N for Bio-Transfix, and 864 +/- 164 N for Endobutton).

CONCLUSIONS

The interference screw and the Rigidfix fixation demonstrated inferior fixation biomechanics compared to the Bio-Transfix and the Endobutton techniques.

摘要

目的

评估前交叉韧带重建术中股骨软组织固定情况。

假设

股骨固定装置在循环加载下具有不同的极限强度和滑动情况。

研究设计

对照实验室研究。

方法

使用33根猪股骨研究干涉螺钉（9例）、Endobutton（8例）、Rigidfix交叉销（8例）和Bio-Transfix交叉销（8例）固定方法。使用材料试验机在50 N至250 N的循环载荷下评估固定滑动情况。通过单次加载至失效确定极限载荷。

结果

与Endobutton（1.75±0.97 mm）和Bio-Transfix（1.14±0.53 mm）相比，Rigidfix（6.02±2.12 mm）和干涉螺钉（5.44±3.25 mm）的总移植物滑动更大（P<.001）。所有技术在最初100个循环中滑动最大（Rigidfix为84%，Endobutton为70%，干涉螺钉为56%，Bio-Transfix为55%）。干涉螺钉技术的失效载荷（539±114 N）低于其他3种技术（Rigidfix为737±140 N，Bio-Transfix为746±119 N，Endobutton为864±164 N，P =.0008）。

结论

与Bio-Transfix和Endobutton技术相比，干涉螺钉和Rigidfix固定表现出较差的固定生物力学性能。

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