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Biaxial flexural modulus of antibiotic‐impregnated orthopedic bone cement
Author(s) -
Leone James,
Johnson Amy,
Ziada Samir,
Hashemi Ata,
Adili Anthony,
de Beer Justin
Publication year - 2007
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30771
Subject(s) - tobramycin , gentamicin , bone cement , materials science , cement , flexural strength , composite material , antibiotics , vancomycin , dentistry , medicine , microbiology and biotechnology , staphylococcus aureus , genetics , bacteria , biology
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