Research ArticlesShort-Term to Mid-Term Outcomes of Arthroscopic Stabilization Using PEEK Knotless AnchorsLee, Jae H.T. MD, MSc; Vivekanandamoorthy, Nurojan MD; Lam, Patrick MD, PhD; Murrell, George A.C. MD, DPhilAuthor Information Orthopaedic Research Institute, St. George Hospital Campus, University of New South Wales, Sydney, NSW, Australia The authors declare no conflict of interest. Reprints: George A.C. Murrell, MD, DPhil, Research and Education Centre, Level 2, 4-10 South Street, Kogarah, Sydney, NSW 2217, Australia (e-mail: email@example.com). Online date: February 14, 2020 Techniques in Shoulder & Elbow Surgery: March 2020 - Volume 21 - Issue 1 - p 15-21 doi: 10.1097/BTE.0000000000000186 Buy Metrics Abstract Outcomes of arthroscopic instability repairs vary depending on repair techniques and anchor materials. The purpose of this study is to determine the short to mid-term redislocation, resubluxation rate and clinical outcomes following arthroscopic stabilization of nonabsorbable, biologically inert polymer polyether ether ketone (PEEK) suture anchors. This is a retrospective study with 140 patients who underwent arthroscopic anterior stabilization surgery using PEEK (Pushlock) anchors with a mean follow-up of 40 months. Patient ranked pain scores, clinically assessed range of motion and strength testing were collected preoperatively and at 1, 6, 12, and 24 weeks after surgery with the final follow-up carried out as a phone interview. After surgery, the redislocation rate increased over time to 18% until it stabilized at 3.8 years. Resubluxation rate increased to 20% until 2.8 years. At 24 weeks, forward flexion, as well as shoulder strength in abduction, adduction, external rotation, internal rotation, and lift-off, improved compared with preoperative levels. Patient ranked pain scores and overall shoulder rating improved significantly at the most recent follow-up compared with before surgery. Arthroscopic stabilization of glenohumeral instability using PEEK knotless anchors results in good short-term to mid-term stability with improved function and reduced pain. Level of Evidence: Level III. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.