SERGIU CIPRIAN FOCSANEANU, PETRICA VIZUREANU, ANDREI VICTOR SANDU, GABRIELA CIOBANU, SIMONA MADALINA BALTATU, DANIELA VLAD EXPERIMENTAL STUDY ON THE INFLUENCE OF ZIRCONIA SURFACE PREPARATION ON DEPOSITION OF HYDROXYAPATITE The present article is a preliminary study focused on the influence of zirconia surface on deposition of hydroxyapatite. The surface characteristics are very important for deposition of various materials. Most of the studies on zirconia are focused on dopped ZrO2 composites or on surface enhancement of these kind of materials. One of the most important property is the osseointegration which can be enhanced with various kind of treatments or deposition. Our preliminary study involved the mechanical grinding and respectively the chemical attack of the surface before the deposition. The results highlights that in order to obtained a better layer of hydroxyapatite the surface of the zirconia samples need to be prepared by chemical attack.