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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2001

Autores

Queiroz, AC (Autor) Outra; Santos, JD (Autor) FEUP; Monteiro, FJ (Autor) FEUP; Gibson, IR (Autor) Outra; Knowles, JC (Autor) Outra

Revista

Título: Biomaterials

Vol. 22 Nº 23

Páginas: 1393-1400

ISSN: 0142-9612

Editora: Elsevier

Indexação

ISI Web of Knowledge - 80 Citações

ISI Web of Science

Scopus - 95 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Biotecnologia ambiental

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia biomédica ; Ciências Tecnológicas > Engenharia > Engenharia de biomateriais

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8