title: Effect of antibiotics on the properties of poly(methylmethacrylate)-based bone cement.
abstract: The goal of this study was to examine the relationship between gentamicin concentration in Palacos R bone cement (in the mass fraction range of 0-9.4%) and various properties of the cement. The results from the thermal, density, and static compression tests show that gentamicin favors the cement polymerization in its final steps, and forms a diphasic structure with the cement [poly(methylmethacrylate)] matrix. The static compression properties in the dry state are only slightly modified by the presence of the antibiotic. Concerning aging in water at 37 degrees C, two types of behavior can be distinguished: below a critical concentration, approximately 3-4%, the extraction of gentamicin by water is slow and there is only a slight change of static compression properties. In contrast, above this critical concentration, the gentamicin extraction is fast and almost complete after 48 weeks, and there is a considerable loss of static compression properties.
authors.affiliation: ENSAM, 151 bld de l'Hôpital 75013, Paris, France.
authors.forename: Y
authors.initials: Y
authors.lastname: He
authors.forename: J P
authors.initials: JP
authors.lastname: Trotignon
authors.forename: B
authors.initials: B
authors.lastname: Loty
authors.forename: A
authors.initials: A
authors.lastname: Tcharkhtchi
authors.forename: J
authors.initials: J
authors.lastname: Verdu
mesh_terms: D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000493:pharmacokinetics / Q000494:pharmacology*; D001696:Biomechanical Phenomena; D001843:Bone Cements; D019245:Compressive Strength; D005839:Gentamicins / Q000008:administration & dosage / Q000493:pharmacokinetics / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D019904:Polymethyl Methacrylate
chemical_list: D000900:Anti-Bacterial Agents; D001843:Bone Cements; D005839:Gentamicins; D019904:Polymethyl Methacrylate