Polyurethane is a biocompatible material that is used for biomedical applications, especially in the fields of tissue engineering, tissue regeneration and replacement applications. Hydroxyapatite is widely used as a bioactive ceramics since it forms a chemical bonding to bone. Applications include coatings of orthopedic and dental implants and scaffolds for bone growth. This work presents an alternative coating method based on biomimetic techniques which are designed to form a crystalline hydroxyapatite layer very similar to the process corresponding to the formation of natural bone. The hydroxyapatite deposits are investigated by means of scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX). In vitro hydroxyapatite formation studies show that the morphology and structure of hydroxyapatite layers alter in different condition of preparation.

Acknowledgments: This research was supported by the Grant al Academiei Romane no. 59/2008 and the PNCDI II - NATOEPA no. 71-020/2007.

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