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Polyhydroxyalkanoate (PHA) scaffolds with good mechanical properties and biocompatibility

by: Kai Zhao, Ying Deng, Jin Chun Chen, Guo-Qiang Chen
Biomaterials, Vol. 24, No. 6. (March 2003), pp. 1041-1045, doi:10.1016/s0142-9612(02)00426-x  Key: citeulike:12161178

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Abstract

Blending microbial polyesters polyhydroxyalkanoates containing polyhydroxybutyrate (PHB) and poly(hydroxybutyrate-co-hydroxyhexanoate) (PHBHHx) were turned into films and scaffolds. The films made from blending polyesters showed that the elongation to break of the blending PHBHHx/PHB film increased from 15% to 106% when PHBHHx content in the blend increased from 40% to 60%. Scaffolds made of PHBHHx/PHB consisting of 60 wt% PHBHHx showed strong growth and proliferation of chondrocytes on the blending materials under scanning electron microscope. Energy dispersive X-ray analysis of the extra cellular matrix on the scaffolds demonstrated a high level of calcium and phosphorus elements in a molar ratio of Ca/P at 1.66, this is approximately equal to that of natural material hydroxyapatite which has a Ca/P ratio of 1.67. This suggested that the chondrocyte cells grown on PHBHHx/PHB scaffolds presented effective physiological function for generation of cartilage.


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