Adsorption and release studies of sodium ampicillin from hydroxyapatite and glass-reinforced hydroxyapatite composites

• Type: Article in International Scientific Journal
• Date: 2001

Authors

Queiroz, AC (Author) Other; Santos, JD (Author) FEUP; Monteiro, FJ (Author) FEUP; Gibson, IR (Author) Other; Knowles, JC (Author) Other

Journal

Title: Biomaterials

Vol. 22 No. 23

Pages: 1393-1400

ISSN: 0142-9612

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 80 Citations

ISI Web of Science

Scopus - 95 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Environmental biotechnology

CORDIS: Technological sciences > Engineering > Biomedical enginnering ; Technological sciences > Engineering > Biomaterial engineering

Other information

Authenticus ID: P-000-V97

DOI: 10.1016/s0142-9612(00)00296-9

Abstract (EN): As a potential therapy for periodontitis, sodium ampicillin, a broad spectrum antibiotic, was adsorbed onto hydroxyapatite (HA) and glass-reinforced hydroxyaptite (GR-HA) composites, and was subsequently released in vitro. The sodium ampicillin, was adsorbed more on HA compared to the GR-IIA composites. X ray diffraction (XRD) and Rietveld analysis were used to identify and quantify the levels of HA and beta -tricalcium phosphate (beta -TCP) in the microstructure of the GR-HA composites, Lattice parameters changes were observed for the beta -TCP phase dependant on the amount of glass added. The release kinetics were shown to be divided into three stages, the first of which where a large amount of sodium ampicillin is released, followed by a slower release rate and then a final stage where the release amount approaches zero, until no more sodium ampicillin was present. X-ray photoelectron spectroscopy (XPS) studies were carried out in order to ensure that the entire antibiotic adsorbed onto the materials had been released. These kinetics studies have indicated the possibility of using these materials as possible carriers for drug delivery.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8