Conventional rotator cuff versus all-suture anchors—A biomechanical study focusing on the insertion angle in an unlimited cyclic model

English version

Autoři: Dimitris Ntalos ^aff001; Kay Sellenschloh ^aff002; Gerd Huber ^aff002; Daniel Briem ^aff003; Klaus Püschel ^aff004; Michael M. Morlock ^aff002; Karl-Heinz Frosch ^aff001; Florian Fensky ^aff001; Till Orla Klatte ^aff001
Působiště autorů: Department of Trauma-, Hand-, and Reconstructive Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany ^aff001; Institute of Biomechanics, TUHH Hamburg University of Technology, Hamburg, Germany ^aff002; Asklepios Westklinikum Hamburg, Hamburg, Germany ^aff003; Institute of Forensic Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany ^aff004
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.pone.0225648

Souhrn

Purpose

The purpose of this study was to compare the biomechanical properties of an all-suture anchor to a conventional anchor used commonly in rotator cuff repairs. Furthermore, the biomechanical influence of various implantation angles was evaluated in both anchor types in a human cadaveric model.

Methods

30 humeri were allocated into three groups with a similar bone density. The two different anchor types were inserted at a predefined angle of 45°, 90° or 110°. Biomechanical testing included an initial preload of 20N followed by a cyclic protocol with a stepwise increasing force of 0,05N for each cycle at a rate of 1Hz until system failure. Number of cycles, maximum load to failure, stiffness, displacement and failure mode were determined.

Results

27 anchors failed by pullout. There was no significant difference between the conventional and the all-suture anchor regarding mean pullout strength. No considerable discrepancy in stiffness or displacement could be perceived. Comparing the three implantation angles no significant difference could be observed for the all-suture or the conventional anchor.

Conclusion

All-suture anchors show similar biomechanical properties to conventional screw shaped anchors in an unlimited cyclic model. The exact insertion angle is not a significant predictor of failure.

Klíčová slova:

Medical implants – Germany – Specimen preparation and treatment – MTS assay – Stiffness – Bone and mineral metabolism

Zdroje

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