Tibial tubercle osteotomy in patello-femoral instability and in patellar height abnormality |
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Authors: | Jacques H Caton David Dejour |
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Institution: | 1. Clinique Orthopédique Emilie de Vialar, 116 Rue Antoine Charial, 69003, Lyon, France
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Abstract: | The aim of this study was to present the different surgical procedures of tibial tubercle osteotomies for patellar instability
or patellar mispositioning such as patella alta or patella infera. This study analysed the Caton–Deschamps index used for
assessment of vertical patella height in order to make a precise plan for tibial tuberosity osteotomies. This study included
61 knees (50 patients) treated for patellar instability with patella alta and 24 patients treated for patella infera of mechanical
origin. The results of medial transfer of the tibial tuberosity, with or without distal transfer in cases of patellar instability
with patella alta, gives excellent results for stability in 76.8% of the cases. The results of the proximal transfer of the
tibial tuberosity in cases of patella infera were excellent or good in 80% of the cases in our series of 24 patients. A precise
preoperative plan is needed with determination of the vertical patellar height using the Caton–Deschamps index and the situation
of the tibial tuberosity and the Tibial Tubercle to Trochlear Groove distance (TT-TG) of the knee on CT scan in order to obtain
satisfactory results. |
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