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Patellar instability is an important cause of knee disability in children and adolescents. A recent population-based study found an annual incidence rate of 2.58 per 100 000 individuals for lateral patella dislocations (LPD), with higher rates in
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Frank DA DeMeo PJ Akhavan S . An algorithm for diagnosing and treating primary and recurrent patellar instability . JBJS Rev 2016 ; 4 :01874474-201609000-00003. 10. Mäenpää H Lehto MU . Patellar
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Introduction Recurrent patellar instability is a disabling condition that can lead to articular cartilage injuries, osteochondral fractures, pain, decreased activity and patellofemoral osteoarthritis (OA). The average annual incidence of
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Epidemiology and history Patellar instabilities account for the most prevalent knee problems during growth. The overall incidence is around 50 in 100 000 children and adolescents per year with a peak at the age of 15 years. 1 , 2 Most
Istituto Ortopedico Rizzoli, Laboratorio di Biomeccanica e Innovazione Tecnologica, Bologna (BO), Italy
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Istituto Ortopedico Rizzoli, Laboratorio di Biomeccanica e Innovazione Tecnologica, Bologna (BO), Italy
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Istituto Ortopedico Rizzoli, Laboratorio di Biomeccanica e Innovazione Tecnologica, Bologna (BO), Italy
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been reported, confirming the possible multi-directional factors involved in this dysplastic condition. 1 Patellofemoral dysplasia, despite being universally accepted as one of the most important factors in patellar instability, represents a
Università degli Studi di Pavia, Pavia, Lombardy, Italy
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stress the fact that particular attention should be paid to femoral internal rotation, which, when present, can produce patellar maltracking with subsequent patellar instability 38 and stiffness as assessed by Berger et al 39 who performed a
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Division of Orthopaedic Surgery, University Hospital of Geneva, Geneva, Switzerland
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or not. Anterior tibial tubercle osteotomies Transposition of the ATT is performed alone or in combination with other surgical procedures in a wide range of patellofemoral pathologies, such as patellar instability, osteoarthritis and
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during the 1990s and used in salvage revision TKA. 11 Their mobile bearings are less constrained, and the use of a polyethylene insert decreases local wear. The rotation decreases the risk of patellar instability. They maintain control over genu
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% have been reported with RH-TKAs, with infections and aseptic loosening the most frequent complications. 1 Patellar instability and prosthetic dislocation can also occur. The dislocation of a RH-TKA is a complication described in the literature
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% patellar instability and 6% implant rupture). The conclusion was that this implant should be used only in knees in which there is a functional absence of a collateral ligament that cannot be managed by soft-tissue reconstruction. 9 In 1989, Shaw et al
