The objective of the present study is to compare the stability and alignment of the patella in patients with previous recurrent dislocation treated with medial patellar femoral ligament reconstruction with fascia lata allograft, 5 years after surgery by conventional CT and by CT under weight-bearing. Conventional CT will be performed with the patient supine, the knee fully extended and with the muscles of the thigh and leg completely relaxed. On the same day, the patient will undergo a CT scan of the knee under weight-bearing with the Cone Beam Computed Tomography (CBCT) scanner system. The CT images will be viewed through the PACS system by two independently expert radiologists who will measure the tilt, congruence angles and the TT-TG with the methodical notes described in the literature. The use of a CT under weight-bearing allows for the first time to evaluate in a realistic way the stability and tracking of the patella, with the knee flexed and therefore with the activation of the quadriceps muscle.
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Patellar Tilt Angle
Timeframe: 24 months
Patellar Congruence Angle
Timeframe: 24 months
Tibial tuberosity-trochlear groove distance
Timeframe: 24 months