Simultaneous MPFL reconstruction and guided growth result in low rates of recurrent patellofemoral instability

Purpose Implant‐mediated guided growth (IMGG) is used to address coronal plane deformity in skeletally immature patients. Few studies have reported on IMGG and simultaneous medial patellofemoral ligament (MPFL) reconstruction for paediatric patients with concurrent genu valgum and patellofemoral instability (PFI). This study aimed to report on the outcomes of these simultaneous procedures. Materials and Methods This was a retrospective review of paediatric patients undergoing simultaneous MPFL reconstruction and IMGG between 2016 and 2023. Mechanical lateral distal femoral angle (mLDFA), hip–knee–ankle angle (HKA) and mechanical axis deviation (MAD) were measured on full‐length hip‐to‐ankle plain radiographs. Measurements were taken preoperatively, prior to implant removal and/or at final follow‐up with minimum 1‐year clinical follow‐up. Results A total of 25 extremities in 22 patients (10 female) underwent simultaneous IMGG and MPFL reconstruction. The mean age at surgery was 12.6 ± 1.7 years. The mean duration of implant retention was 18.6 ± 11.3 months. Nineteen extremities (76%) underwent implant removal by final follow‐up. Preoperative HKA corrected from a mean of 5.8 ± 2.3° to −0.8 ± 4.5° at implant removal or final follow‐up (p