OBJECTIVE: To determine the effect of suture anchor type, eyelet configuration (raised or embedded), and loading condition (without or with cyclic loading) on failure load and failure mode of sutures in anchors with embedded and raised eyelets. STUDY DESIGN: Controlled laboratory study. SAMPLE POPULATION: A total of 4 unique clinical anchor+suture combinations (n = 40 total)
eyebolt screw reference samples (n = 30 total). METHODS: A total of 10 samples of each anchor+suture combination were either (a) loaded to failure (n = 5) or (b) loaded from 0 N to 60 N for 1000 cycles then loaded to failure (n = 5). As a "best-case" reference, an eyebolt screw with a smooth, round cross-section was tested under the same two loading conditions and the same sutures (n = 10 per suture) used with the clinical anchors. The percent difference in the maximum load at failure ( RESULTS: There was no effect of loading condition (i.e., without or with cyclic loading) on F CONCLUSION: Anchors with raised eyelets had more failures at the suture mid-section indicative of wear and/or cutting of the suture against the eyelet. CLINICAL SIGNIFICANCE: Eyelet geometry and surface finish of metallic screw-type anchors have effects on suture strength.