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This Article Full Text Full Text (PDF) All Versions of this Article: 33/2/214    most recent 0363546504267348v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Request Reprints Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (13) Citing Articles via Google Scholar Google Scholar Articles by De Carli, A. Articles by Ferretti, A. Search for Related Content PubMed PubMed Citation Articles by De Carli, A. Articles by Ferretti, A. Related Collections Biomechanics Graft fixation Shoulder

Effect of Cyclic Loading on New Polyblend Suture Coupled With Different Anchors

From St. Andrea Hospital, University "La Sapienza" Rome, Italy

^* Address correspondence to Angelo De Carli, MD, St. Andrea Hospital, University of Rome, Via Di Val Cannuta 213, Rome 00166, Italy.

Background: Secure tendon-to-bone fixation is essential for successful rotator cuff repair. Biomechanical properties of devices used in rotator cuff repair should be better understood.

Purpose: To evaluate the response to incremental cyclic loading of 6 different anchor-suture complexes commonly used in rotator cuff repair.

Study Design: Controlled laboratory study.

Methods: Two absorbable anchors 5 mm and 6.5 mm in diameter and 1 metallic anchor, coupled with Ethibond or FiberWire, were tested on 5 pairs of fresh-frozen human cadaveric shoulders. An incremental cyclic load was applied until failure using a Zwich-Roell Z010 electromechanical testing machine. The ultimate failure load and mode of failure were recorded. An analysis of variance model was used for statistical analysis.

Results: The FiberWire suture coupled with both absorbable and metallic anchors provided statistically significantly stronger fixation. However, although the metallic anchors in most cases failed because of slippage of the anchor, absorbable anchors failed because of rupture of the eyelet.

Conclusions: The FiberWire seems to increase the strength of fixation devices under cyclic load using both absorbable and metallic anchors, with relevant differences in failure mode (slippage of the metallic anchor and eyelet failure in the absorbable anchor).

Clinical Relevance: Use of the FiberWire suture might change the mode of failure of the suture-anchor complexes.

Key Words: anchors • sutures • biomechanics • cyclic load • shoulder

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