1Ex-Post Graduate Student, Dept. of Conservative Dentistry & Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru-560054
2Professor & Dean, Dept. of Conservative Dentistry & Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru-560054
3Professor and Head, Dept. of Conservative Dentistry & Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru-560054
4Assistant Professor, Dept. of Conservative Dentistry & Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru-560054
5Reader, Dept. of Conservative Dentistry & Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru-560054
*Corresponding Author E-mail: swetha.bala@yahoo.com
Online published on 18 January, 2019.
Composite resins are extensively used due to their excellent optical and superior adhesive properties. One innate disadvantage of these materials is that their color changes over time. Routine oral hygiene practices also has an impact on the surface texture. Improvements in filler technology has helped in combatting these issues. Estelite® α, a supra-nano spherical filled resin composite is one such recently introduced material. Aim of the study: To compare the changes in surface gloss and roughness of three different resin composites following simulated tooth brushing at varying time intervals.
Estelite® α-Supranano (Group I), Filtek™ Z350-Nanofilled (Group II) and Filtek™ P60-Microhybrid composite (Group III) discs were fabricated using customized molds (n=44 per group). Sof-Lex® finishing and polishing discs were used sequentially from coarse to superfine for an optimal surface finish. Baseline surface gloss and roughness values were recorded using glossmeter and optical profilometer. The discs were then subjected to custom-made motor-assisted toothbrush abrasion along with a toothpaste slurry, under a constant load of 2N. The surface gloss and roughness were re-assessed at intervals of 5, 15, 30 and 60 minutes of tooth brushing. Statistical analysis was performed using Wilcoxon test for intra-group comparison and one-way ANOVA for inter-group comparison.
Tooth-brushing influenced the surface roughness and gloss of all tested materials. The supra-nano filled composite (Estelite® α) exhibited maximum gloss and minimum roughness while the microhybrid composite (Filtek™ P60) exhibited minimum gloss and maximum roughness, at the end of the testing period.
From the present study, it was concluded that supra-nano composites maintained the best surface texture even after 60 minutes of simulated toothbrushing.
Supra-nano Filled Composite, Microhybrid Composite, Nano-filled Composite, Gloss, Surface Roughness
