Patient-Reported Outcomes After Arthroscopic Superior Capsule Reconstruction With an Acellular Porcine Dermal Xenograft for Irreparable Rotator Cuff Tears

Background: Currently, there is no consensus on the adequate management of irreparable rotator cuff tears. Arthroscopic superior capsule reconstruction (SCR) seems to be an alternative treatment option. Purpose/Hypothesis: The purpose of this study was to evaluate patient-reported outcomes up to 2 years after the treatment of irreparable rotator cuff tears with SCR using an acellular porcine dermal xenograft. It was hypothesized that SCR treatment with an acellular porcine dermal xenograft would not result in a significant clinical improvement or pain relief in patients with irreparable rotator cuff tears if the xenograft fails. Study Design: Case series; Level of evidence, 4. Methods: A total of 26 consecutive patients with irreparable rotator cuff tears were enrolled in the study between 2015 and 2019. All patients underwent SCR with acellular porcine dermal xenograft. Patient-reported outcome measures including visual analog scale (VAS) for pain, the American Shoulder and Elbow Surgeons (ASES) score, the Veterans RAND 12- Item Health Survey (VR-12), and the Single Assessment Numeric Evaluation (SANE) were followed up for 2 years. For statistical analysis, the 1-way analysis of variance was used to compare means for VAS, ASES, VR-12, and SANE results between pre- and posttreatment. Magnetic resonance imaging (MRI) records were obtained at 1 year postoperatively to evaluate graft integrity. Results: In total, 22 patients were included in the patient-reported outcomes with 4 being lost at final follow-up. The mean VAS score decreased from 4.2 ± 2.5 to 1.0 ± 1.4 (P < .001) from pretreatment to 2 years postoperatively. The mean ASES – index score improved significantly from 47.7 ± 15.3 to 86.4 ± 12.9 (P < .001) and the SANE score improved from 34.0 ± 20.4 to 77.3 ± 20.2 (P < .001). In addition, a clinically important difference in the patients’ quality of life was achieved, as shown by the mean changes in the VR-12 physical (+4.3) and mental scores (+9.3). Based on postoperative MRI, the dermal graft on the humeral side was intact in 15 (68.2%) patients after surgery. Conclusion: Our arthroscopic SCR with an acellular porcine dermal matrix showed significant and continuous improvement in pain and clinical scores up to a 2-year follow-up in patients with irreparable rotator cuff tears, even with structural graft failure. However, further studies and evaluation of larger patient groups are needed to evaluate the long-term effect of this procedure.