157. ANTIBIOTIC BONE CEMENT AND THE INCIDENCE OF DEEP INFECTION FOLLOWING TOTAL KNEE ARTHROPLASTY

Abstract

Purpose: Prophylactic use of antibiotic-laden bone cement (ALBC) has been proposed to decrease the incidence of deep infections. We asked if the use of antibiotic laden bone cement decreased the deep infection rate following primary total knee replacement (TKA) as compared to plain bone cement (PBC).

Method: We surveyed 1,625 consecutive patients undergoing cemented, primary knee replacement with either ALBC or PBC. Relevant covariates including age, body mass index (BMI), gender, education, and medical comorbidity were collected. Joint pain and functional status were assessed at baseline and at 1 year follow up with the respective Western Ontario McMaster University Osteoarthritis Index (WOMAC) scores. The incidence of deep infection at 1 year follow up was recorded.

Results: There were 811 (49.9%) patients in the ALBC group and 814(50.1%) in the PBC group. There were no differences in age, gender, BMI, education or comorbidity between groups at baseline (p> 0.05). We found a deep infection rate of 3.1% in the ALBC group and 2.2% in the PBC group (p=0.27). Adjusted analysis showed that ALBC was not predictive of a lower infection rate at 1 year (p=0.84).

Conclusion: ALBC did not reduce the incidence of deep infection following primary TKA at 1 year follow up. Further studies are needed to define any high risk groups for which ALBC might be beneficial.