STUDY CONCERNING THE INFLUENCE OF THE FINISHING AND POLISHING SYSTEMS ON THE SURFACE STATE OF VARIOUS TYPES OF COMPOSITE RESINS

Abstract

The aim of the study was to evaluate the effect of three different one-step and two-steps polishing systems on the surface roughness of two composite resins, one with nanoparticles and one microhybrid: Filtek Supreme XT (3M ESPE) and Filtek Z 250 (3M ESPE). 35 samples (30 mm X 8 mm X 2 mm) were made from each material. 5 samples of each material were polished using the finishing long flame bur for composite resins (NTI, Kahla GmbH, Germany) without water cooling, 5 samples using the one-step abrasive rubber P20032 (NTI, Kahla GmbH, Germany) without water cooling, 5 samples using the two-steps finishing system which uses the abrasive rubbers P1932 and P19032 (NTI, Kahla GmbH, Germany). The other samples were finished with the same systems, but under water cooling. 5 non-finished and non-polished samples of each material were considered control samples. The samples surfaces were analyzed using the atomic force microscopy. The use of two-steps polishing systems led to a significantly smoother surfaces of both types of composite resins when comparing with the one-step polishing systems (Anova and Bonferroni statistical test, p<0,05). All finishing and polishing systems used in association with water led to a significantly smoother surfaces when comparing to those obtained using the same systems without water for both types of composite resins