We report a case of superior dislocation of the patella in a young woman without degenerative changes. We retrospectively analyzed the clinical and imaging data obtained from the patient. This article describes a rare case of patellar dislocation following a bicycle fall in a 19-year-old woman without any history of patellofemoral complaints. Our literature search yielded 28 case reports; however, most reports describe older individuals with osteoarthritis. Only two reports have previously described this lesion in young patients without osteophytes, but some features, like an increase of the patella tilt, may raise doubts about whether it would be better to classify them as a vertical dislocation of the patella, another quite rare lesion, or just as a variant of a superior dislocation.
Total knee arthroplasty in valgus knee deformities continues to be a challenge. It comprises only 10% of patients who undergo total knee arthroplasty. The surgeon should be aware of the technical aspects that differentiate it from the varus deformity: surgical exposure, bone cuts, ligament balancing, gap balancing, joint line obliquity, patellar tracking, preserving fibular nerve function, and selection of the implant. The aim of this chapter is to provide step-by-step comprehensive knowledge about different surgical techniques for the correction of severe valgus deformity in total knee arthroplasty.
Os designs de próteses de joelho evoluíram muito nas últimas décadas. No entanto, próteses padrão podem não se adequar totalmente à anatomia do paciente, levando a superfícies ósseas descobertas ou excessos. Observou-se variabilidade na anatomia entre gêneros e raças; e opções de próteses customizadas apareceram para preencher esta lacuna. Neste trabalho, observou-se que para cada 1 milímetro de área descoberta no corte femoral, essa área representa 5% da área total de corte. Com isso, temos uma fixação óssea não otimizada.
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