Influence of polyethylene glycol graftings on the in vitro degradation and calcification of bovine pericardium.
J Biomater Appl
; 11(4): 430-52, 1997 Apr.
Article
em En
| MEDLINE
| ID: mdl-9178094
ABSTRACT
Calcification is a frequent cause of the clinical failure of bio-prosthetic heart valves fabricated from glutaraldehyde pretreated bovine pericardium (GATBP). This article reports on various chemical techniques for grafting polyethylene glycol (PEG) on bovine pericardium, their biostability, and calcification. The process of calcification profile was studied by in vitro experiments via the incubation of pericardial samples in a metastable solution of calcium phosphate. The calcification profile of PEG-modified bovine pericardium through glutaraldehyde linkages was significantly reduced compared to other methods of grafting. The mechanical property of these PEG-modified tissues after enzyme (collagenase) digestion and calcification were also investigated. PEG grafting of BP via glutaraldehyde or hexamethylene diisocyanate had shown better mechanical stability compared to other grafting methods used. In conclusion, it seems that the surface modification of bovine pericardium through high molecular weight PEGs via glutaraldehyde linkages may provide new ways of controlling tissue biodegradation and calcification.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Pericárdio
/
Polietilenoglicóis
/
Desenho de Prótese
/
Bioprótese
/
Calcinose
/
Colagenases
Limite:
Animals
Idioma:
En
Revista:
J Biomater Appl
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
Índia