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Gülecyüz, Mehmet F.; Schröder, Christian; Pietschmann, Matthias F.; Göbel, Stephanie; Lehmann, Mario; Mayer, Jörg; Ficklscherer, Andreas; Jansson, Volkmar; Müller, Peter E. (2018): Novel ultrasound assisted suture anchor system using the BoneWelding (R) technology yields a comparable primary stability in osteopenic and healthy human humeri as a benchmark anchor. In: Acta Orthopaedica et Traumatologica Turcica, Vol. 52, No. 2: pp. 127-133
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Introduction: The aim of this biomechanical study was to evaluate the primary stability of the Sport-Welding (R) Sombrero 3.6 mm suture anchor system in osteopenic and healthy cadaveric humeri. Methods: The Sombrero (R) and BioCorkscrew (R) anchors were deployed in 8 osteopenic and 4 healthy cadaver humeri after the bone mineral density (BMD) measurements of the 32 specimens. Both anchors were loaded with a USP Nr. 2 FiberWire (R) suture. An established cyclic testing protocol was performed. The maximum failure load (Fmax), the system displacement and the modes of failure were recorded. Results: The Fmax and system displacement of the Sombrero (R) in osteopenic and healthy humeri was equivalent to the Bio-Corkscrew (R) benchmark anchor;there were no significant differences in the maximum failure loads and system displacement values. Only anchor and suture dislocations were observed;suture ruptures did not occur. Conclusion: This study shows that the Sombrero (R) yields similar maximum failure loads and system displacement values as the established Bio-Corkscrew (R) benchmark anchor. The primary stability of the Sombrero (R) and Bio-Corkscrew (R) seems to be independent of the bone mineral quality. This relatively small-sized polymer anchor is independent of the BMD and may be an alternative to established suture.