Abstract
Purpose
To evaluate with computed tomography (CT) the incidence of anchor-related osteolysis after implantation of two types of all-suture anchors for the management of labral lesions in shoulder instability.
Methods
Single-cohort, observational study with 12-month follow-up. Thirty-three participants (27 males/6 females; age 38.3 years [SD 11.3]) with anterior labral lesions in which 143 all-suture anchors (71 Iconix 1.4 mm and 72 Suturefix 1.7 mm) were implanted were evaluated with a CT performed a mean of 15.4 [3.85] months after surgery. The volume of the bone defects was measured in the CT. Every anchor was classified into one of four groups: (1) no bone defect. (2) Partial bone defect (defects smaller than the drill used for anchor placement). (3) Tunnel enlargement (defects larger than the drill volume but smaller than twice that volume). (4) Cystic lesion (defects larger than twice the drill volume).
Results
No bone defect was identified in 16 anchors (11.2%, [95% CI 6.5–17.5%]). A partial bone defect was found in 84 anchors (58.7% [50.2–66.9%]). Tunnel enlargement was found in 43 anchors (30.11% [22.6–37.6%]). No anchor caused cystic lesions (0% [0–2.5%]). The defect volume was a mean of 27.8 mm3 (SD 18.4 mm3, minimum 0 mm3, maximum 94 mm3). Neither the position in the glenoid nor the type of implant used had a significant effect in the type or size of the defects.
Conclusion
When using all-suture anchors in the glenoid during instability surgery, relevant bone osteolytic defects are rare at 1-year follow-up. Most anchor insertion tunnels will fill completely (11%) or partially (59%) with bone. Tunnel enlargement will develop in 30% of anchors. No cystic defects larger than 0.125 cm3 were observed. There is a low risk that all-suture anchors cause significant osteolytic bone defects in the glenoid. These implants can be used safely.
Level of evidence IV
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The study was approved by the Institutional Review Board of Hospital Universitario Ramón y Cajal (Madrid, Spain, approval number 126-18).
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Ruiz Ibán, M.A., Vega Rodriguez, R., Díaz Heredia, J. et al. Arthroscopic Bankart repair with all-suture anchors does not cause important glenoid bone osteolysis: a volumetric CT study of 143 anchors. Knee Surg Sports Traumatol Arthrosc 29, 2152–2158 (2021). https://doi.org/10.1007/s00167-020-06192-1
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DOI: https://doi.org/10.1007/s00167-020-06192-1