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Biaxial flexural modulus of antibiotic-impregnated orthopedic bone cement

✍ Scribed by James Leone; Amy Johnson; Samir Ziada; Ata Hashemi; Anthony Adili; Justin de Beer

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 275 KB
Volume: 83B
Category: Article
ISSN: 1552-4973
DOI: 10.1002/jbm.b.30771

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Previously reported antibiotic‐impregnated cement strengths have been based on uniaxial and fatigue testing methodologies. These methods may not provide an accurate characterization of bone cement's true load‐bearing capacity in total joint replacement (TJR). The present study utilized biaxial testing to report on the properties of antibiotic‐impregnated cement. Test groups included: PMMA mixed with Vancomycin, Gentamicin, Tobramycin, or no antibiotic (control). In comparison to the control group, PMMA samples mixed with powdered gentamicin resulted in an increase in the mean elastic modulus by 6.50% versus a drop noted with powdered vancomycin and tobramycin by 2.65 and 1.37% respectively. The mean elastic modulus in samples containing liquid gentamicin dropped by 11.6%. This study supports the continued use of powdered antibiotics when clinically indicated, but suggest caution in the use of liquid gentamicin in TJR. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2007

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