인공 치아용 안정화 지르코니아의 물리적 특성 및 생체적합성(II) : Yttria 안정화 지르코니아

Abstract

Zirconia is a ceramic material with adequate mechanical properties for manufacturing of medical devices. In this study, mechanical properties of calcia stabilized zirconia (CSZ, 10 mol% CaO), prepared by pechini process, was compared with 3 mol% yttria stabilized zirconia (YSZ). The purpose of this study is to investigate the mechanical properties and biocompatibility of cold isostatic pressed (CIP) yttria stabilized zirconia composites. After sintering, we investigated by X-ray diffraction (XRD, Rigaku, D/max III, Japan) patterns, 3-point bending strength (H-10K, Hounsfield, U.K), Vickers hardness (MXD-CX3E, Matsuzawa, Japan) and low temperature degradation (LTD). The decreasing particle size and homogeneous distribution were achieved by containing Al2O3 and milling process. The maximum Vickers hardness and bending strength of yttria stabilized zirconia were about 2120.7 Hv, 563 MPa. And surface image were analyzed by field emission scanning electron microscopy (FE-SEM, JEOL, JSM-6700F). In the Agar diffusion test, it is confirmed that all the materials which is used for the test are noncytotoxic.