Jordy van Sambeeck

Age at surgery is correlated with pain scores following trochlear osteotomy in lateral patellar instability 5 75 Results The patient database of our hospital identified 180 trochlear osteotomies in 150 unique patients, of whom 37 patients (55 procedures) could not be contacted or refused to participate. This led to the inclusion of 113 patients with 125 surgical procedures. Twelve patients had undergone bilateral trochlear osteotomy. Demographics and mean outcome scores are displayed in Table 1. Nine patients had no true lateral X-ray available in the database and were therefore not retrospectively classified into one of the four types of trochlear dysplasia. Variable Outcome Age at surgery in years (range) 19.8 (12.5-46.3) Follow-up time (months) 71 (12-125) Gender: Female (%) 102 (82) Type of trochlear dysplasia (%) Type A 14 (12) Type B 55 (49) Type C 9 (8) Type D 33 (29) Previous procedures (%) 16 (13) Additional procedures (%) 69 (55) MPFL reconstruction 7 (5.6) Tibial tuberosity transfer 63 (50) Complications during follow-up (%) 9 (7) Flexion deficit 4 (3) Persisting instability 1 (1) Removal TCP-wedge 2 (2) Break-out of osteotomy 1 (1) Venous thrombo-embolic event 1 (1) Outcome score VAS pain at rest 19 (0-80) VAS pain at activity 38 (0-90) VAS instability 40 (0-100) VAS disability 34 (0-100) VAS satisfaction 66 (1-100) Kujala Knee Score 73 (17-100) SF-36 General health 72 (10-100) Table 1. Demographic characteristics and outcome scores. Values represent mean with range, unless otherwise indicated. N is number of knees unless otherwise indicated.