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The Effect of Brushing and Aging on the Staining and Smoothness of Resin Composites
Author(s) -
Mozzaquatro Lisandra R.,
Rodrigues Camila S.,
Kaizer Marina R.,
Lago Maristela,
Mallmann André,
Jacques Letícia B.
Publication year - 2017
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/jerd.12293
Subject(s) - dentifrice , toothbrush , wine , gloss (optics) , materials science , profilometer , surface roughness , composite material , dentistry , surface finish , food science , chemistry , medicine , brush , inorganic chemistry , fluoride , coating
Objectives To evaluate the staining and smoothness of resin composites undergoing aging in water or red wine and simulated brushing with or without dentifrice. Methods The resin composites (Z250 microfilled and Z350XT nanofilled) were tested according to aging media (deionized water or red wine) and surface treatment (no brushing, brushed with water, or brushed with dentifrice). Specimens ( n = 10) were subjected to three aging cycles (5 days) of continuous immersion in the aging media; each followed by simulated brushing (585 strokes). Color coordinates (CIEL* a * b *) were measured with a spectrophotometer (SP60, EX‐Rite) and roughness (Ra) measured with a contact profilometer (Surftest SJ‐201P, Mitutoyo), in five time points across the experiment. Surface morphology was analyzed using AFM (SPM‐9600, Shimadzu) at the end of the experiment. Data for color change (Δ E 00 ) and Ra were analyzed by two‐way repeated measures ANOVA and Tukey test ( p < 0.05). Results Color change was observed for all groups, and it was always greater for Z350. Surface treatment did not influence the Δ E 00 values for the groups aged in water. However, brushing decreased Δ E 00 for the groups aged in red wine. In general, Δ E 00 increased with time. Little to no differences in smoothness were observed with aging and brushing. The surface morphology analyses showed exposed/lost filler particles for brushed Z250. Such observations were not so clear for Z350. Conclusions Within the limitations of the present experiment, short‐time simulated toothbrushing with soft‐bristle toothbrush and low abrasive dentifrice did not increase roughness and reduced staining for both nanofilled and microfilled materials. CLINICAL SIGNIFICANCE Staining and surface degradation of the resin composites was reduced, but not prevented by brushing alone. Thus, minimizing the restoration exposure to staining substances is important for maintaining the aesthetic appearance of the restoration. (J Esthet Restor Dent 29:E44–E55, 2017)