Arthroscopically Assisted Internal Brace Augmentation of the Medial Patellofemoral Ligament for Treating Patellar Dislocation

Abstract Objective To describe the early clinical outcomes of arthroscopically assisted Internal Brace augmentation of the medial patellofemoral ligament (MPFL) in treating patellar dislocation. Methods A retrospective analysis was conducted on 19 patients with patellar dislocation (Dejour A and B trochlear dysplasia, TT-TG <20 mm, Insall-Salvati index 0.8–1.2) treated with arthroscopically assisted Internal Brace MPFL augmentation, with at least 24 months of follow-up. The cohort included 12 females and 7 males (mean age: 18.32 years). Outcomes assessed included radiological evaluations (patellar congruence angle, tilt angle, and lateralization distance via CT) and clinical scores (Lysholm, Kujala, VAS, Tegner, and Crosby-Insall). Patient satisfaction and complications were also recorded. Results All 19 surgeries were completed successfully without complications. Six patients underwent concurrent cartilage debridement. No patients were lost to follow-up (mean: 28.95 months). At the final follow-up, Kujala, Lysholm, VAS, and Tegner scores improved significantly (p < 0.001). Patellar positioning was good, with no redislocation or subluxation. Radiological assessments showed significant improvements in congruence angle, tilt angle, and lateralization distance (p < 0.001). No postoperative complications were reported. Most patients (90%) were satisfied and returned to pre-injury activity levels. Conclusion Arthroscopically assisted Internal Brace MPFL augmentation effectively improves knee stability in patellar dislocation, with favorable early outcomes and low complication rates.