EP7.8 Postoperative outcomes following gluteus medius/minimus repair with tapestry patch augmentation A prospective study

Abstract Background Greater trochanteric pain syndrome (GTPS) is a painful condition affecting the lateral hip and thigh. The syndrome often involves gluteus medius and minimus tendon pathology and has seen a rise in prevalence since being formally defined in 1991. Although operative treatment is dominated by gluteus medius repair, limited data exists regarding early patient-reported outcomes, strength, and ultrasound imaging following longitudinal surgical repair. Methods Thirteen patients who underwent open gluteus medius/minimus repair using double- or triple-loaded suture anchors and a standard double-row technique to reattach the tendon to its anatomic footprint, augmented with the Tapestry® Biointegrative Implant (Tapestry), were followed prospectively using patient-reported outcome measures collected at six weeks, three months, six months, and one year postoperatively. Measures included Hip Outcome Score-Activities of Daily Living (HOS-ADL), Hip Outcome Score-Sports (HOS-Sports), Modified Harris Hip Score (mHHS), iHOT-12, tendon thickness measured through ultrasound and strength measures of both the operative and contralateral sides. Friedman tests were used to evaluate all measures apart from strength, which was compared using a Wilcoxson signed-rank test between six months and one year postoperatively. Results This cohort was predominantly female (84.6%), with a mean age of 65.8 ± 9.4 years and mean body mass index (BMI) of 30.1 ± 6.8. Significant improvement was observed in HOS-ADL (47.3 ± 12.6 to 71.8 ± 17.7; p=0.01), mHHS (44.5 ± 13.4 to 69.0 ± 17.1; p=0.04), and iHOT-12 scores (39.3 ± 26.5 to 66.0 ± 22.9; p=0.01). HOS-Sports scores improved from 28.0 ± 19.9 to 45.6 ± 29.7, but was not significant (p=0.20). Tendon thickness increased from 0.26 ± 0.11 cm at baseline to 0.42 ± 0.13 cm at one year, but was not significant (p=0.31). No significant differences were observed in strength over time between the operative and contralateral limbs at six months compared to one year post-surgery. Conclusion In these preliminary findings, open gluteal tendon repair for GTPS with Tapestry Biointegrative Implant augmentation was associated with significant improvement in patient-reported outcome measures through one year post-surgery. Ultrasound tendon thickness and strength recovery was not found to be statistically significant within this small cohort. This warrants further evaluation at additional timepoints in the recovery timeline.