Novel ultrasound assisted suture anchor system using the BoneWelding® technology yields a comparable primary stability in osteopenic and healthy human humeri as a benchmark anchor

Acta Orthop Traumatol Turc. 2018 Mar;52(2):127-133. doi: 10.1016/j.aott.2017.11.009. Epub 2017 Dec 28.


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.

Keywords: Biomechanics; Bone density; Bone welding; Osteoporosis; Rotator cuff; Suture anchor; Ultrasound.

MeSH terms

  • Arthroplasty / methods
  • Benchmarking / methods
  • Biomechanical Phenomena
  • Bone Density
  • Bone Diseases, Metabolic / pathology
  • Bone Diseases, Metabolic / physiopathology
  • Cadaver
  • Humans
  • Humerus / pathology
  • Humerus / surgery
  • Materials Testing
  • Rotator Cuff Injuries / surgery*
  • Suture Anchors / standards*
  • Suture Techniques
  • Ultrasonography / methods