肩腱板縫合用スーチャーアンカーの引き抜き強度：生体工学的研究

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To compare the pullout strength of different types of suture anchors for a rotator cuff repair. 4 types of metallic suture anchors (FASTIN RC anchorTM, Mitek; CorkscrewTM, Arthrex; Super Revo anchorTM, Linvatec; TwinFixTM, Smith & Nephew) (6 per group) were inserted into 3 different densities of urethane-made blocks (10, 15, 20 lb/ ft3). The original sutures in each anchor were replaced by 2 threads of stronger type sutures ( #2, UltrabradeTM, Smith & Nephew ). Anchors were inserted perpendicular to the block surface and then pulled reversely. Both failure load and failure mode were recorded. Data were analyzed using a Bonferroni/Dunn multiple comparison procedure. In the urethane blocks of 10 and 15 lb/ ft3, the average failure load was 127N and 265N for FASTIN, 151N and 297N for Corkscrew, 154N and 312N for Super Revo, 153N and 348N for TwinFix respectively, all of which failed between the anchor and the block. In the urethane blocks of 20 lb/ft3, the sutures failed at approximately 500N of failure load in all anchors, and therefore anchor pull-out tests were interrupted. In the 10 lb/ ft3 block, there were no significant differences in failure load among 4 types of anchors. In the 15 lb/ ft3 block, FASTIN had a statistically significant lower failure load than the other anchors (p<.01), and TwinFix had a statistically significant greater failure load than the other (p<.01). There were no significant differences in failure load among any type of anchor in a low-minute urethane block, while in a middle-minute urethane block TwinFix had a significant greater failure load.

肩腱板縫合用スーチャーアンカーの引き抜き強度：生体工学的研究

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