Medial opening-wedge has gained popularity in comparison to other techniques of high tibial osteotomy. This technique involves the creation of a gap in the tibia. Filling the gap with autologous iliac bone graft was recommended in the classic description, to prevent complications such as correction loss or delayed bone union. No previous reports have compared grafted and nongrafted osteotomies. This study hypothesized that the use of autologous bone graft in medial opening-wedge high tibial osteotomy (MOWHTO) less than 12.5 mm is unnecessary. A prospective randomized clinical trial was conducted. Forty-six opening-wedge high tibial osteotomies were carried out between April 2007 and December 2008. All had fixation with a type of Puddu stainless steel plate and screws. Patients were randomly divided by software analysis into two groups: group A had osteotomies that were filled with autologous bone graft and group B had osteotomies that were unfilled. Autologous iliac bone graft was harvested in both groups. Clinical and radiographic evaluations were performed twice monthly by blinded investigators. The rates of complications were compared between the groups. There was no difference in demographic data. Mean time to clinical bone union in group A was 12.4 weeks (confidence interval [CI] 11.2-13.6) and in group B was 13.7 weeks (CI 12.5-14.9), but this difference was not significant (P = 0.13). Signals of correction loss occurred in one patient (4.35%) in group A, and in two patients (8.70%) in group B. All osteotomies had achieved bone union. It was concluded that time to bone union was not statistically different between the group with bone graft and the group without graft.
pelo apoio, atenção e colaboração na análise dos resultados. viii "Há homens que lutam um dia e são bons. Há outros que lutam um ano e são melhores. Há os que lutam muitos anos e são muito bons. Porém, há os que lutam toda a vida. Esses são os imprescindíveis." Bertold Brecht. ix RESUMO Resumo x RESUMO Objetivos: Avaliar a altura da patela e a função do joelho, pós-osteotomia medial e valgizante, supra tuberositária da tíbia (OMV-ST). Métodos: Vinte e cinco pacientes portadores de osteoartrite (OA) medial do joelho e instabilidade ligamentar, associados à deformidade em varo, foram submetidos à correção da deformidade, por meio de osteotomia medial e valgizante, de cunha aberta, supra tuberositária da tíbia. Estes pacientes e seus dados radiológicos foram avaliados pré e pós-operatoriamente, sendo medido a altura da patela e a função do joelho. Para estas medidas foram utilizados os Índices de Insall-Salvati(IIS), Caton-Deschamps(ICD) e o Knee Score(KS).Resultados: Pré-operatoriamente, a média das medidas da altura patelar, determinado pelo método de Insall-Salvati, resultou em 0,88+/-0,17. Após a cirurgia foi de 0,92+/-0,20, sem diferença estatística (p=0,186). Pelo método de Caton-Deschamps, a média da altura da patela antes da cirurgia foi de 0,64+/-0,14. Após a cirurgia houve uma redução significativa da altura da patela, com média de 0,53+/-0,11(p=0,0004). A média dos valores do Knee Score variou de 48,25+/-15,15 a 72,08+/-16,87(p<0,001), aumento estatístico significativo após a cirurgia.Conclusão: Concluiu-se que após a osteotomia medial e valgizante, de cunha aberta, supra tuberositária da tíbia, o Índice de Caton-Deschamps indicou a ocorrência de patela baixa. O mesmo não ocorreu quando foi utilizado o Índice de Insall-Salvati.Houve melhora da função do joelho, segundo o Knee Score.Palavras chaves: altura patelar; osteotomia valgizante tíbia; cunha medial.
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