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Updated: Feb 16, 2026

Installation Method to Enhance Quality Control for Fiber Reinforced Polymer Spike Anchors
Published on: April 10, 2018
Novel ultrasound assisted suture anchor system using the BoneWelding® technology yields a comparable primary
Mehmet F Güleçyüz1, Christian Schröder2, Matthias F Pietschmann1
1Department of Orthopaedics, Physical Medicine and Rehabilitation, Medical Center of the University of Munich (Ludwig-Maximilians-University), Munich, Germany.
Introduction:
The aim of this biomechanical study was to evaluate the primary stability of the SportWelding® Sombrero 3.6 mm suture anchor system in osteopenic and healthy cadaveric humeri.
Methods:
The Sombrero® and BioCorkscrew® 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® 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® in osteopenic and healthy humeri was equivalent to the Bio-Corkscrew® 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® yields similar maximum failure loads and system displacement values as the established Bio-Corkscrew® benchmark anchor. The primary stability of the Sombrero® and Bio-Corkscrew® 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 anchors in rotator cuff repair.
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