“Comparative evaluation of effect of toothbrush-dentifrice abrasion on surface roughness of resin composites with different filler loading:” An in vitro study
Nitika Singh1, C MeenaKumari2, Abhishek Bansal3, Sweety Pal4, Riyadh Alroomy5, V VinuthaKumari6
1 Department of Conservative Dentistry, Sudha Rastagi Dental College, Faridabad, India
2 Department of Restorative Dental Sciences, Majmaah University, Al Zulfi, Saudi Arabia
3 Department of Conservative Dentistry and Endodontics, M.M.College of Dental Sciences, Maharishi Markandeshwar College of Dental Sciences, MMU, Ambala, Haryana, India
4 Department of Dental Surgery, Ras Bihari Bose Subharti University, Dehradun, Uttarakhand, India
5 Department of Restorative Dental Sciences, College of Dentistry, Majmaah University, Al Zulfi, Saudi Arabia
6 Department of Substitutive Dental Sciences, College of Dentistry, Majmaah University, Al Zulfi, Saudi Arabia
Dr. Nitika Singh
Department of Conservative Dentistry, Sudha Rastogi Dental College, Faridabad, Haryana
Source of Support: None, Conflict of Interest: None
Objectives: This in vitro study evaluated the effect of toothbrush-dentifrice abrasion on the surface roughness of two restorative posterior resin composites, Filtek Z250 and Z350 after simulated toothbrushing twice daily for a period of 3 months.
Methods: All the specimens were polished and cleaned and surface topography was evaluated by Veeco di CP-II Atomic Force Microscope (AFM) at six different points; similarly, these specimens were again subjected to evaluation after simulated toothbrushing using dentifrice. The surface roughness evaluation was done for AFM images using software made available and the factor measured were average roughness (Ra) and maximum peak to valley distance R(p v). Data were normally distributed as tested using the Shapiro–Wilk W-test (P > 0.05). Therefore, analysis was performed using the parametric tests, i.e., independent “t”-test (for comparing two groups). The level of statistical significance was set at P < 0.05.
Results: The mean change in Ra and the mean change in Rp-v for Z350 were less as compared to Z250, and this difference was statistically significant.
Conclusions: Within the limitation of the present study, it can be concluded that toothbrushing increased the roughness in Z250 in comparison to Z350.