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Published in: European Journal of Orthopaedic Surgery & Traumatology 8/2023

03-05-2023 | Gentamicin | Original Article

Does antibiotic bone cement reduce infection rates in primary total knee arthroplasty?

Authors: David Cieremans, Nishanth Muthusamy, Vivek Singh, Joshua C. Rozell, Vinay Aggarwal, Ran Schwarzkopf

Published in: European Journal of Orthopaedic Surgery & Traumatology | Issue 8/2023

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Abstract

Introduction

Infection after total knee arthroplasty (TKA) impacts the patient, surgeon, and healthcare system significantly. Surgeons routinely use antibiotic-loaded bone cement (ALBC) in attempts to mitigate infection; however, little evidence supports the efficacy of ALBC in reducing infection rates compared to non-antibiotic-loaded bone cement (non-ALBC) in primary TKA. Our study compares infection rates of patients undergoing TKA with ALBC to those with non-ALBC to assess its efficacy in primary TKA.

Methods

A retrospective review of all primary, elective, cemented TKA patients over the age of 18 between 2011 and 2020 was conducted at an orthopedic specialty hospital. Patients were stratified into two cohorts based on cement type: ALBC (loaded with gentamicin or tobramycin) or non-ALBC. Baseline characteristics and infection rates determined by MSIS criteria were collected. Multilinear and multivariate logistic regressions were performed to limit significant differences in demographics. Independent samples t test and chi-squared test were used to compare means and proportions, respectively, between the two cohorts.

Results

In total, 9366 patients were included in this study, 7980 (85.2%) of whom received non-ALBC and 1386 (14.8%) of whom received ALBC. There were significant differences in five of the six demographic variables analyzed; patients with higher Body Mass Index (33.40 ± 6.27 vs. 32.09 ± 6.21; kg/m2) and Charlson Comorbidity Index values (4.51 ± 2.15 vs. 4.04 ± 1.92) were more likely to receive ALBC. The infection rate in the non-ALBC was 0.8% (63/7,980), while the rate in the ALBC was 0.5% (7/1,386). After adjusting for confounders, the difference in rates was not significant between the two groups (OR [95% CI]: 1.53 [0.69–3.38], p = 0.298). Furthermore, a sub-analysis comparing the infection rates within various demographic categories also showed no significant differences between the two groups.

Conclusion

Compared to non-ALBC, the overall infection rate in primary TKA was slightly lower when using ALBC; however, the difference was not statistically significant. When stratifying by comorbidity, use of ALBC still showed no statistical significance in reducing the risk of periprosthetic joint infection. Therefore, the advantage of antibiotics in bone cement to prevent infection in primary TKA is not yet elucidated. Further prospective, multicenter studies regarding the clinical benefits of antibiotic use in bone cement for primary TKA are warranted.
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Metadata
Title
Does antibiotic bone cement reduce infection rates in primary total knee arthroplasty?
Authors
David Cieremans
Nishanth Muthusamy
Vivek Singh
Joshua C. Rozell
Vinay Aggarwal
Ran Schwarzkopf
Publication date
03-05-2023
Publisher
Springer Paris
Published in
European Journal of Orthopaedic Surgery & Traumatology / Issue 8/2023
Print ISSN: 1633-8065
Electronic ISSN: 1432-1068
DOI
https://doi.org/10.1007/s00590-023-03557-3

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