Jordy van Sambeeck

Table of Contents Page Chapter 1 Introduction and aims of this thesis 9 Chapter 2 Patellar height measurements: Insall-Salvati ratio is most reliable method. Knee Surg Sports Traumatol Arthrosc. 28(3): 869-875 (2020) 29 Chapter 3 Complications of a self-centering sliding tibial tubercle osteotomy for patellofemoral complaints; low incidence of non-union and fracture. Orthop Traumatol Surg Res. 106(5): 957-961 (2020) 45 Chapter 4 A detaching, V-shaped tibial tubercle osteotomy is a safe procedure with a low complication rate. Arch Orthop Trauma Surg 140(12):1867-1872 (2020) 57 Chapter 5 Age at surgery is correlated with pain scores following trochlear osteotomy in lateral patellar instability; a cross- sectional study of 113 cases . Journal of Orthopaedic Surgery and Research 16:337 (2021) 69 Chapter 6 A stand-alone lateral condyle elevating trochlear osteotomy leads to high residual instability but no excessive increase in patellofemoral osteoarthritis at 12-year follow-up. Knee Surg Sports Traumatol Arthrosc. 26(4):1216-1222 (2018) 85 Chapter 7 Trochleoplasty procedures show complication rates similar to other patellar-stabilizing procedures. Knee Surg Sports Traumatol Arthrosc. 26(9):2841-2857 (2018) 101 Chapter 8 Dutch translation and validation of the Norwich Patellar Instability score and Banff Patella Instability Instrument in patients after surgery for patellar instability. Acta Orthop Belg 86(3):470-481 (2020) 123