title: Surface roughness of different dental materials before and after simulated toothbrushing in vitro.
abstract: This study measured the effect of toothbrushing with a slurry of toothpaste on different dental materials that have been optimally polished. Specimens (n=8) of 21 dental materials, 16 resin composites, 1 amalgam and 4 ceramic materials, were subjected to 36,000 cycles (approximately five hours) of circular toothbrushing with a force of 1.7 N and a slurry of toothpaste (RDA 75) in a device for simulated toothbrushing. The unpolished enamel and dentin of extracted anterior teeth were used as a control. The mean roughness (Ra) was measured with an optical sensor (FRT MicroProf) before and after toothbrushing. To compare the roughness of the different materials, ANOVA with a post hoc Tukey B test was applied (p<0.05). Among the resin composites, the hybrid composites showed the greatest increase in mean roughness, while the microfilled composites and the compomer Compoglass F demonstrated the lowest increase. No statistically significant difference in roughness was found before and after simulated toothbrushing for the Amalcap amalgam, Esthet-X resin composite, TPH Spectrum resin composite, d.SIGN ceramic and the experimental ceramic. The other ceramic materials and dentin and enamel specimens showed a statistically significant decrease in mean roughness after simulated toothbrushing. Glazed Empress demonstrated a statistically significant higher initial roughness than polished Empress. For resin composites, no correlation was found between the mean particle size and mean roughness after simulated toothbrushing.
authors.affiliation: Research & Development, In Vitro Research, Ivoclar Vivadent, Schaan, Liechtenstein. siegward.heintze@ivoclarvivadent.com
authors.forename: Siegward D
authors.initials: SD
authors.lastname: Heintze
authors.forename: Monika
authors.initials: M
authors.lastname: Forjanic
mesh_terms: D000538:Aluminum Silicates; D001031:Apatites; D020770:Compomers; D003188:Composite Resins; D003723:Dental Amalgam; D003743:Dental Enamel; D003776:Dental Porcelain; D019554:Dental Restoration Wear; D003804:Dentin; D005899:Glass Ionomer Cements; D006801:Humans; D012044:Regression Analysis; D013499:Surface Properties; D014072:Tooth Abrasion / Q000209:etiology; D014099:Toothbrushing / Q000009:adverse effects
chemical_list: D000538:Aluminum Silicates; D001031:Apatites; C105428:Compoglass; D020770:Compomers; D003188:Composite Resins; C466112:Esthet-X; D005899:Glass Ionomer Cements; C075815:IPS-Empress ceramic; C467914:TPH spectrum; C506670:d.SIGN ceramic; D003776:Dental Porcelain; D003723:Dental Amalgam