Resumo Objetivo O presente estudo prospectivo, randomizado e controlado foi realizado com 286 pacientes submetidos à artroplastia total primária do joelho (ATJ) com o objetivo de avaliar a eficácia da adição de antibiótico ao cimento ósseo como forma de prevenção da infecção pós-artroplastia (IPA). Métodos Os pacientes foram randomizados em dois grupos: cimento ósseo sem antibiótico (Sem ATB, n = 158) ou cimento com antibiótico (Com ATB, n = 128), ao qual foram adicionados 2g de Vancomicina para 40 g de cimento. Os pacientes foram acompanhados por 24 meses após a cirurgia. Resultados No que diz respeito aos dados demográficos pré-operatórios, a distribuição dos pacientes entre os grupos foi homogênea (p < 0,05). No período de 24 meses, a taxa global de infecção foi de 2,09% (6/286), não havendo diferença (odds ratio [OR] = 1,636; intervalo de confiança [IC] 95%: 0,294−9,080; p = 0,694) entre o grupo Com ATB (1,56%; 2/128) e Sem ATB (2,53%; 4/158). No grupo Sem ATB, a infecção foi causada por Staphylococcus aureus resistente à meticilina (MRSA, na sigla em inglês) (n = 2), S. aureus sensível à meticilina (MSSA, na sigla em inglês) (n = 1) e Eschirichia coli (n = 1). Proteus mirabilis e MSSA foram isolados dos pacientes do grupo Com ATB. Dentre as comorbidades, todos os pacientes com IPA eram hipertensos e não diabéticos. Dois pacientes com artrite reumatoide que desenvolveram IPA eram do grupo Com ATB. Conclusão O uso de cimento com ATB reduziu o número absoluto de infecções; porém, sem diferença estatística entre os grupos. Desta forma, o uso rotineiro não deve ser encorajado. Objective The present prospective, randomized and controlled study was conducted with 286 patients submitted to primary total knee arthroplasty (TKA) with the objective of evaluating the efficacy of the addition of antibiotics to bone cement as a way to prevent post arthroplasty infection (PAI). Methods The patients were randomized into two groups: bone cement without antibiotic (No ATB, n = 158) or cement with antibiotic (ATB, n = 128), in which 2 g of vancomycin was added to 40 g of cement. The patients were followed up for 24 months after surgery. Results Regarding preoperative demographic data, the distribution of patients between groups was homogeneous (p < 0.05). In the 24-month period, the overall infection rate was of 2.09% (6/286), with no difference (odds ratio [OR] = 1.636; 95% confidence interval [CI]: 0.294-9.080; p = 0.694) between the ATB group (1.56%; 2/128) and the No ATB group (2.53%; 4/158). In the No ATB group, the infection was caused by methicillin-resistant Staphylococcus aureus (MRSA) (n = 2), methicillin-sensitive S. aureus (MSSA) (n = 1) and Eschirichia coli (n = 1). Proteus mirabilis and MSSA were isolated from patients in the ATB group. Among the comorbidities, all patients with PAI were hypertensive and nondiabetic. Two rheumatoid arthritis patients who developed PAI were from the ATB group. Conclusion The use of cement with ATB reduced the absolute number of infections, but without statistical difference between the groups; thus, routine use should not be encouraged.
Abstract Objective The present prospective, randomized and controlled study was conducted with 286 patients submitted to primary total knee arthroplasty (TKA) with the objective of evaluating the efficacy of the addition of antibiotics to bone cement as a way to prevent post arthroplasty infection (PAI). Methods The patients were randomized into two groups: bone cement without antibiotic (No ATB, n = 158) or cement with antibiotic (ATB, n = 128), in which 2 g of vancomycin was added to 40 g of cement. The patients were followed up for 24 months after surgery. Results Regarding preoperative demographic data, the distribution of patients between groups was homogeneous (p < 0.05). In the 24-month period, the overall infection rate was of 2.09% (6/286), with no difference (odds ratio [OR] = 1.636; 95% confidence interval [CI]: 0.294−9.080; p = 0.694) between the ATB group (1.56%; 2/128) and the No ATB group (2.53%; 4/158). In the No ATB group, the infection was caused by methicillin-resistant Staphylococcus aureus (MRSA) (n = 2), methicillin-sensitive S. aureus (MSSA) (n = 1) and Eschirichia coli (n = 1). Proteus mirabilis and MSSA were isolated from patients in the ATB group. Among the comorbidities, all patients with PAI were hypertensive and nondiabetic. Two rheumatoid arthritis patients who developed PAI were from the ATB group. Conclusion The use of cement with ATB reduced the absolute number of infections, but without statistical difference between the groups; thus, routine use should not be encouraged.
