RESUMO Objetivo: Este é um estudo descritivo para relatar nosso método de correção cirúrgica para pacientes com deformidades de hálux valgo. Métodos: De 2006 a 2012, 516 pacientes consecutivos (601 pés) com deformidade de hálux valgo foram tratados cirurgicamente em nosso departamento, depois que os tratamentos conservadores foram esgotados. O ângulo do hálux valgo, o ângulo intermetatarsal, o ângulo articular metatarsal distal e o grau de osteoartrite da primeira articulação metatarsofalângica foram medidos em radiografias pré-operatórias simples do antepé com apoio de peso. Resultados: Os pacientes jovens com desvio intermetatarsal grave foram submetidos à combinação de osteotomia distal e proximal do primeiro metatarso (n = 21). Os pacientes com desvio intermetatarsal menor foram submetidos a osteotomia de Chevron no metatarso distal (n = 196), enquanto que os pacientes com desvio intermetatarsal grave e deformidades menos flexíveis e sem osteoartrite foram submetidos a osteotomia da base do metatarso com um procedimento distal no tecido mole (n = 173). Nos pacientes idosos ativos com osteoartrite na primeira articulação metatarsofalângica realizou-se artrodese (n = 100) ou artroplastia de ressecção (n = 58). Conclusão: Determinar alguns ângulos com radiografias simples do antepé com apoio de peso em combinação com idade e nível de atividade dos pacientes pode ajudar e simplificar o método de correção cirúrgica, usando o esquema que desenvolvemos. Nível de Evidência IV, Série de casos.

ABSTRACT Objective: This is a descriptive study to report our method of operative correction for patients with hallux valgus deformities. Methods: From 2006 to 2012, 516 consecutive patients (601 feet) with hallux valgus deformities were treated surgically in our department after conservative treatments were exhausted. The hallux valgus angle, intermetatarsal angle, distal metatarsal articular angle, and degree of osteoarthritis in the first metatarsophalangeal joint were measured on preoperative plain radiographs of the weight-bearing forefoot. Results: Young patients with severe intermetatarsal deviation received a combined proximal and distal osteotomy of the first metatarsal (n = 21). Patients with low intermetatarsal deviation received a distal metatarsal chevron osteotomy (n = 196), whereas patients with severe intermetatarsal deviation and less flexible deformities without osteoarthritis received a basal metatarsal osteotomy with a distal soft tissue procedure (n = 173). Elderly active patients with osteoarthritis in the first metatarsophalangeal joint received an arthrodesis (n = 100) or resection arthroplasty (n = 58). Conclusion: Determining a few simple angles on plain radiographs of the weight-bearing forefoot in combination with the age and level of activity of patients can help simplify the operative correction method by using the schema we developed. Level of evidence IV, case series.

RESUMO Objetivo: Embora tenham sido estabelecidos vários parâmetros radiográficos para descrever a geometria e a patologia do quadril, seus valores de referência e significância clínica continuam sendo uma questão controversa. O presente estudo testa a hipótese de que a idade tem impacto relevante sobre os parâmetros radiográficos do quadril. Método: As vistas pélvicas anteroposteriores foram medidas quanto ao ângulo CE, ângulo de Sharp, proporção entre profundidade e largura acetabular, índice de extrusão da cabeça do fêmur, obliquidade do lábio do acetábulo (teto), ângulo cabeça-colo-diafisário (CCD) e razão da cabeça do fêmur de Murray e os valores obtidos foram correlacionados com a idade. Resultados: Foram observadas correlações lineares significantes, fracas e moderadas (todos os P < 0,001) entre idade e ângulo CE (ρ = 0,31), ângulo de Sharp (ρ = -0,38), índice de extrusão da cabeça do fêmur (ρ = -0,22), ângulo CCD (ρ = -0,15), proporção entre profundidade e largura acetabular (ρ = -0,38) e obliquidade do lábio do acetábulo (ρ = -0,19), enquanto a razão da cabeça do fêmur de Murray (ρ = 0,05; P = 0,274) não foi associada à idade. Curiosamente, todos os parâmetros que descrevem o acetábulo mostraram um aumento relevante de cobertura com idade, levando a ângulos CE bem além de 40° e ângulos de Sharp abaixo de 35° em uma grande parcela de idosos assintomáticos. Conclusão: Embora a diminuição do ângulo CCD com a idade seja descrita na maioria dos livros didáticos de ortopedia, as alterações na geometria acetabular observadas com a idade ultrapassam, de longe, as medidas na junção entre cabeça e colo do fêmur. Recomendamos considerar essas alterações que podem ser atribuídas à idade ao formular um diagnóstico radiográfico. Nível de Evidência III, Estudos Diagnósticos - Investigação de um Exame para Diagnóstico.

ABSTRACT Objective: While several radiographic parameters have been established to describe the geometry and pathology of the hip, their reference values and clinical significance remain a matter of dispute. The present study tests the hypothesis that age has a relevant impact on radiographic hip parameters. Method: Pelvic antero-posterior views were measured for CE angle, Sharp’s angle, acetabular depth-to-width ratio, femoral head extrusion index, roof obliquity, caput-collum-diaphyseal (CCD) angle, and Murray’s femoral head ratio, and the values obtained were correlated with age. Results: Significant weak and moderate linear correlations (all Ps<0.001) were observed between age and CE angle (ρ=0.31), Sharp’s angle (ρ=-0.38), extrusion index (ρ=-0.22), CCD angle (ρ=-0.15), depth-to-width ratio (ρ=-0.38), and roof obliquity (ρ=-0.19), while Murray’s femoral head ratio (ρ=0.05; P=0.274) was not associated with age. Interestingly, the parameters describing the acetabulum all showed a relevant increase in coverage with age, leading to CE-angles well beyond 40° and a Sharp’s angle below 35° in a large portion of asymptomatic older adults. Conclusion: While a decrease in CCD angle with age is described in most orthopedic textbooks, the changes observed with age in acetabular geometry far exceed those measured at the femoral head-neck junction. We recommend considering these alterations that may be attributable to age when formulating a radiographic diagnosis. Level of Evidence III, Diagnostic Studies - Investigating a Diagnostic Test.

ABSTRACT Objective: Infection after total hip (THA) and knee arthroplasty (TKA) is a serious complication which typically leads to a long lasting and intensive surgical and medicamentous treatment. The aim of this study was to identify factors that influence outcome after revision surgery caused by prosthetic infection. Methods: We retrospectively analyzed 64 patients who had revision surgery between 1989 and 2009 due to periprosthetic infection. We examined a total of 69 joints (TKA: 36%, THA: 64%), follow-up 5.1 years (0.5-21 years) after the initial surgical intervention. The mean patient age at time of surgery was 67 years old (43-79 years old). Clinical data and scores including the Western Ontario and McMaster Universities (WOMAC)-Index, the Harris Hip Score (HHS) and the Hospital for Special Surgery Score (HSS) were surveyed. Results: There was no difference in clinical scores regarding treatment between a single and a multiple stage treatment regime. Infections with multiple microorganisms and Enterococcus spp. lead to a significantly higher number of interventions. Using a modified Tsukayama system we classified 24% as type I, 34% type II and 42% type III- infections, with no differences in clinical outcome. Overweight patients had a significantly lower HHS and WOMAC-score. Immunosuppression leads to a worse WOMAC and HSS-Score. An increased number of procedures was associated to a limping gait. Conclusion: Thorough surgical technique leads to good clinical results independent of infection-type and treatment philosophy. Level of Evidence III, Case Control Study.