Fabrication and characterization of a biomimetic composite scaffold for bone defect repair.
J Biomed Mater Res A
; 94(1): 298-307, 2010 Jul.
Article
en En
| MEDLINE
| ID: mdl-20186731
ABSTRACT
For successful bone tissue engineering, scaffolds with tailored properties are a basic requirement. The combination of different available materials not only appears to be desirable but also very challenging. In this study, a composite material consisting of hydroxyapatite and collagen was produced by a biomimetic precipitation method and characterized by X-ray diffraction (XRD) and thermogravimetry (TGA). Subsequently, a suspension-quick-freezing and lyophilization method was used to incorporate the hydroxyapatite into a polymeric matrix consisting of collagen and chitosan. Before physicochemical characterization, the highly porous scaffolds were consolidated by a dehydrothermal treatment (DHT). The main attention was focused on the particle size of hydroxyapatite, which should be in the nanometer range. This is relevant to achieve a homogeneous resorption of the material by osteoclasts. Small-angle X-ray scattering (SAXS), atomic force microscopy (AFM), and environmental scanning electron microscopy (ESEM) were used to evaluate the outcome. The results suggest a successful polymeric embedding of nanoscaled hydroxyapatite particles into the matrix of the spongy construct. (c) 2010 Wiley Periodicals, Inc. J Biomed Mater Res, 2010.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Sustitutos de Huesos
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Ingeniería de Tejidos
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Materiales Biomiméticos
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Andamios del Tejido
Tipo de estudio:
Evaluation_studies
Límite:
Animals
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Humans
Idioma:
En
Año:
2010
Tipo del documento:
Article