Bioactivity in glass/PMMA composites used as drug delivery system (original) (raw)
Gentamicin sulfate has been incorporated in composites prepared from a SiO }CaO}P O bioactive glass and polymethylmethacrylate. Data showed that these materials could be used as drug delivery system, keeping the bioactive behavior of the glass. The composites supply high doses of the antibiotic during the "rst hours when they are soaked in simulated body #uid (SBF). Thereafter, a slower drug release is produced, supplying &maintenance' doses until the end of the experiment. The gentamicin release rate is related with the ionic Ca> and H O> exchange between composite and SBF. The porous structure of the composites allows the growth of hydroxycarbonate apatite on the surface and into the pores.
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