Biocompatibility and degradation of aliphatic segmented poly(ester amide)s: in vitro and in vivo evaluation.
J Biomed Mater Res A
; 76(4): 699-710, 2006 Mar 15.
Article
en En
| MEDLINE
| ID: mdl-16315190
Aliphatic segmented poly(ester amide)s, comprising a crystallizable amide phase and a flexible amorphous ester phase, were investigated for potential use in biomedical applications. By varying the amide content and the type of crystallizable amide segments, the polymer's thermal and mechanical properties can readily be tuned. Polymers with 25 and 50 mol % of amide content are noncytotoxic and sustain growth of fibroblasts onto polymer films. The in vitro degradation of these polymers was followed in PBS (pH 7.4) at 37 degrees C up to 7 months. The poly(ester amide)s showed the characteristics of bulk degradation with a gradual decrease in molecular weight and almost no mass loss. The in vivo degradation of these polymers, followed by subcutaneous implantation in rats up to 6 weeks, was slow and similar to the in vitro degradation. The tissue response upon implantation was followed over 6 weeks. A mild foreign-body reaction, characterized by the presence of macrophages, and sporadically a lymphocyte, were observed in the first week of implantation. After 6 weeks the implant site is characterized by fibrous encapsulation with no signs of inflammation. The poly(ester amide)s tested are biocompatible, but their in vitro as well as in vivo degradation is very slow.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Poliésteres
/
Materiales Biocompatibles
/
Amidas
Tipo de estudio:
Evaluation_studies
Límite:
Animals
Idioma:
En
Revista:
J Biomed Mater Res A
Asunto de la revista:
ENGENHARIA BIOMEDICA
Año:
2006
Tipo del documento:
Article
País de afiliación:
Países Bajos
Pais de publicación:
Estados Unidos