EFFECTS OF DIFFERENT FINISHING PROCEDURE ONTO NANOMECHANICAL CHARACTERISTICS OF VENEERING CERAMIC

Abstract

This paper describes the nanomechanical characteristics of fluorapatite veneering ceramic (IPS e.max Ceram, Ivoclar Vivadent) treated with three different surface finishing procedures: polishing, glazing and grinding, using the Anton Paar nanoindentation. Also, AFM analysis of different surface finishing procedure was done in order to determine the 3D surface topography and roughness parameter Ra. The hardness (HV) and Young's modulus (E) of the surface structure were presented as results of nanoindentation measurements. Nanoindentation tests was done using Berkovich diamond pyramid and the experiment was organized in a 3x4 array. Indentation imprints were investigated using the optical and Atomic Force Microscopy. The obtained results show that the nanomechanical properties mostly depend of prepared surface finishing procedures.