Interference Screw Versus Suture Endobutton Fixation of a Fiber-Reinforced Meniscus Replacement Device in a Human Cadaveric Knee Model

The American Journal of Sports Medicine
Jay M PatelCharles J Gatt

Abstract

Meniscal lesions represent one of the most common intra-articular knee injuries. Meniscus replacement devices are needed to restore load distribution and knee stability after meniscectomy. Fixation of these devices is crucial to the generation of hoop stresses and the distribution of loads in the joint. To evaluate 2 different fixation techniques (suture endobutton and interference screw) for implantation of a novel meniscus device. Controlled laboratory study. In 7 human cadaveric knees (aged 17-61 years), 1 anterior and 2 potential posterior tunnel locations were investigated, and both fixation techniques were tested in each tunnel. The native meniscus roots, devices fixed with a suture endobutton, and devices fixed with an interference screw were gripped with cryoclamps, and tibias were drilled and loaded into a custom jig. Samples were preloaded, preconditioned, loaded for 500 cycles (50-150 N), and tested in tension until failure. For all 3 tunnels, suture fixation resulted in greater elongation (54.1%-150.7% greater; P < .05) during cyclic loading than interference screw fixation, which approximated the native roots. Both fixation techniques displayed ultimate tensile loads in the same range as native roots. However, stif...Continue Reading

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Citations

Mar 26, 2019·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Solaiman TarafderChang H Lee
Nov 9, 2019·Journal of Biomechanical Engineering·Jay M PatelMichael G Dunn

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