EFFECT OF DIAMOND PASTE FINISHING ON AFM SURFACE TEXTURE PARAMETERS AND TOPOGRAPHY OF DENTAL NANOCOMPOSITES POLISHED BY TWO DIFFERENT PROCEDURES

摘要

Commercially available and the most widely used oral bionanomaterials in dental practice are resin-based composites containing oxide nanoparticles. The aim of this study was to determine the effect of diamond paste finishing on AFM surface texture parameters of dental nanocomposites polished by two different dental polishing protocols. Representative dental resin-based nanofilled and nanohybrid composite were tested in this study. The samples were polished by two dental polishing protocols using multi-step and one-step system. These protocols were than followed by diamond paste polishing. Samples were examined by Veeco di CP-II Atomic Force Microscope, in contact mode with CONT20A-CP tips. Average roughness (Ra) and maximum peak-to-valley distance (Rp-v) were analyzed and compared between samples. Multi-step polishing protocol produced significantly lower Ra and Rpv values, for both tested materials, than one-step polishing protocol, even when it was followed by diamond paste polishing.