Effects of polishing systems on the surface roughness of tooth-colored materials

摘要

Background/purpose Polishing systems may affect the surface characteristics of the tooth-colored restorative materials. In this in?vitro study, we evaluated the surface roughness of various tooth-colored restorative materials after polishing them with three different polishing systems. Materials and methods The tooth-colored restorative materials evaluated were conventional glass–ionomer cement, compomer, microhybrid, and nanofil composite. In total, 112 specimens (10?mm in diameter and 2?mm thick) were prepared in a metal mold using four different tooth-colored restorative materials. After the light curing and setting cycle, seven specimens from each group which received no polishing treatment were used as controls. Specimens were randomly polished with Sof-Lex disks, Poli-pro disks, and the Hiluster Plus systems for 30 seconds. The mean surface roughness of each polished specimen was determined with a profilometer and examined using scanning electron microscopy. Data were analyzed using a two-way analysis of variance and Bonferroni's post-hoc multiple-comparison test, with a probability level of 0.05. Results According to the two-way analysis of variance, the type of tooth-colored materials, polishing technique, and their interactions were statistically significant (P??0.05). According to the scanning electron microscopy observations, the surface irregularities of the materials were consistent with the surface roughness profilometric findings. Conclusion The effectiveness of a polishing system on the surface roughness depends on both the polishing system and restorative material.