Preparation, characterization and in vitro release of gentamicin from coralline hydroxyapatite–gelatin composite microspheres

Composite microspheres have been prepared from bioactive ceramics such as coralline hydroxyapatite [CHA, Ca 10(PO 4) 6(OH) 2] granules, a biodegradable polymer, gelatin and an antibiotic, gentamicin. In our earlier work, we have shown a gentamicin release from CHA granules—chitosan composite microsp...

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Bibliographic Details
Published in:Biomaterials 2002-08, Vol.23 (15), p.3175-3181
Main Authors: Sivakumar, M., Panduranga Rao, K.
Format: Article
Language:English
Subjects:
Biocompatible Materials
Bone Substitutes
Ceramics
Composite microspheres
Coralline hydroxyapatite
Delayed-Action Preparations
Drug Delivery Systems
Gelatin
Gentamicin
Gentamicins - administration & dosage
Gentamicins - isolation & purification
Hydroxyapatites
In Vitro Techniques
In-vitro release
Materials Testing
Microscopy, Electron, Scanning
Microspheres
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Summary:Composite microspheres have been prepared from bioactive ceramics such as coralline hydroxyapatite [CHA, Ca 10(PO 4) 6(OH) 2] granules, a biodegradable polymer, gelatin and an antibiotic, gentamicin. In our earlier work, we have shown a gentamicin release from CHA granules—chitosan composite microspheres. In the present investigation, an attempt was made to prepare the composite microspheres containing coralline hydroxyapatite and gelatin (CHA–G), which were prepared by the dispersion polymerization technique and the gentamicin was incorporated by the absorption method. The crystal structure of the composite microspheres was analyzed using X-ray powder diffractometer. The Fourier transformed infrared spectrum clearly indicated the presence of amide and hydroxyl groups in the composite microspheres. Scanning electron micrographs and optical micrographs show that the composite microspheres are spherical in shape and porous in nature. The particle size of composite microspheres was analyzed and the average size was found to be 16 μm. The thermal behavior of composite microspheres was studied using thermogravimetric analysis and differential scanning calorimetric analysis. The cumulative in vitro release profile of gentamicin from composite microspheres showed near zero order patterns.
ISSN:0142-9612
1878-5905
DOI:10.1016/S0142-9612(02)00066-2