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- Title
Biomechanical Comparisons of Three Posterior Cruciate Ligament Reconstruction Procedures with Load-Controlled and Displacement-Controlled Cyclic Tests.
- Authors
Kitamura, Nobuto; Yasuda, Kazunori; Yamanaka, Masanori; Tohyama, Harukazu
- Abstract
Background: Biomechanical behaviors of posterior cruciate ligament reconstructions under cyclic loading have not been sufficiently clarified. Hypothesis: Biomechanical behaviors of the reconstruction that involves use of flexor tendons and an Endobutton are significantly different under cyclic loading from behaviors of the two standard reconstructions in which bone-patellar tendon-bone graft is used. Study Design: Controlled laboratory study. Methods: In a porcine model, the tendon/Endobutton reconstruction, the tendon-bone/interference screw reconstruction, and the tendon-bone/tibial-inlay reconstruction were biomechanically compared by using two cyclic tests. In each group of 15 specimens, 5 knees underwent tensile testing without cyclic loading, and the remaining 10 underwent the same tensile test after 5000 cycles of load-controlled or displacement-controlled loading. Results: At the 5000th cycle, the peak displacement or the peak load was affected by each type of cyclic loading to a significantly greater degree in the knees with the tendon/Endobutton procedure than in the knees reconstructed with the other two procedures. Conclusions: Plastic deformation occurred more easily during cyclic loading in the knees with the tendon/Endobutton reconstruction than in the knees with the tendon-bone reconstructions. Clinical Relevance: When the tendon/Endobutton reconstruction is used, a longer period of postoperative immobilization is necessary.
- Subjects
CRUCIATE ligaments; TENDON injuries; BONE injuries; ORTHOPEDICS
- Publication
American Journal of Sports Medicine, 2003, Vol 31, Issue 6, p907
- ISSN
0363-5465
- Publication type
Article
- DOI
10.1177/03635465030310062801