ArticleOrthopaedic journal of sports medicine2025
The Relationship Between Bone Quality and Biomechanical Strength of All-Suture Anchors Utilized in Rotator Cuff Repairs.
Article in Orthopaedic journal of sports medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: All-suture anchors (ASAs) are increasingly used in arthroscopic rotator cuff repair and rely on cortical bone for strength. No study has compared ASA pullout strength in relation to bone mineral density (BMD) in the different quadrants of the supraspinatus footprint on the greater tuberosity (GT). Hypothesis: ASA biomechanical characteristics at each quadrant would improve with increasing regional BMD. Study Design: Controlled laboratory study. Methods: Four 2.6-mm ASAs were inserted into the anteromedial, posteromedial, anterolateral, and posterolateral quadrants of the GT supraspinatus footprint of 12 cadaveric specimens. Local measures of bone quality around each anchor were evaluated using micro-computed tomography. Afterward, each ASA was biomechanically loaded to failure to determine the ultimate pullout strength and mode of failure. Repeated measures correlations were calculated to determine the relationship between measures of bone quality and pullout strength. Results: The mean load to failure of ASA placed in the posterolateral GT was significantly greater than all 3 of the other quadrants ( Conclusion: ASA pullout strength is correlated with local cortical BMD. ASA fixation strength and BMD were robust in all quadrants on the GT, and were greatest in the posterolateral GT. Clinical Relevance: This finding expands the available geography for ASA placement by demonstrating that the lateral GT has adequate BMD to support ASAs.
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