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Effect of brushing and accelerated ageing on color stability and surface roughness of composites

Roselino, Lourenço de Moraes Rego ; Cruvinel, Diogo Rodrigues ; Chinelatti, Michelle Alexandra ; Pires-de-Souza, Fernanda de Carvalho Panzeri

Journal of dentistry, 2013-11, Vol.41 (S5), p.e54-e61 [Revista revisada por pares]

England: Elsevier Ltd

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Effect of brushing and accelerated ageing on color stability and surface roughness of composites
Autor: Roselino, Lourenço de Moraes Rego ; Cruvinel, Diogo Rodrigues ; Chinelatti, Michelle Alexandra ; Pires-de-Souza, Fernanda de Carvalho Panzeri
Materias: Abrasiveness ; Aging ; Aluminum Silicates - chemistry ; Bisphenol A ; Brushing ; Cellulose ; Color ; Colors (materials) ; Composite ; Composite Resins - chemistry ; Dental Materials - chemistry ; Dental Porcelain - chemistry ; Dentifrice ; Dentifrices - chemistry ; Dentistry ; Fluorides ; Humans ; Light-Curing of Dental Adhesives - methods ; Materials Testing ; Nanocomposites - chemistry ; Nanostructure ; Samples ; Silicic Acid - chemistry ; Spectrophotometry - instrumentation ; Stability ; Standard deviation ; Statistical analysis ; Statistical methods ; Surface Properties ; Surface roughness ; Time Factors ; Toothbrushing - instrumentation ; Toothbrushing - methods ; Toothpastes - chemistry
Es parte de: Journal of dentistry, 2013-11, Vol.41 (S5), p.e54-e61
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Descripción: Abstract Objectives The aim of this study was to evaluate the effect of brushing and artificial accelerated ageing (AAA) on color stability and surface roughness of aesthetic restorative materials. Methods One hundred and twenty specimens (12 mm diameter × 2 mm thick), 40 of each material ( n = 8) were obtained using nanosized composite Z350 (3M ESPE), nanohybrid composite Tetric N-Ceram (Ivoclar Vivadent) and ceramic IPS e.max Ceram (Ivoclar Vivadent), as control. Initial color (Spectrophotometer PCB 6807) and surface roughness (Surfcorder SE 1700) readouts were taken and the samples were separated into five groups ( n = 8) and treated as follows: Group 1: mechanical brushing with dentifrice RDA* 68 (Colgate), Group 2: mechanical brushing with dentifrice RDA* 180 (Colgate Total Plus Whitening), Group 3: AAA, Group 4: AAA followed by mechanical brushing with dentifrice RDA* 68 and Group 5: AAA followed by mechanical brushing with dentifrice RDA* 180. Mechanical brushing was performed for 205 min and AAA for 480 h; new color and surface roughness readouts were taken. Data were statistically analyzed (two-way ANOVA repeated measures, Bonferroni test, p < 0.05). Results Dentifrice abrasiveness was not significant for color change and surface roughness. When submitted to AAA+brushing, the color stability of Tetric was statistically significant ( p < 0.05) with both dentifrices and with dentifrice RDA* 180 for Z350. The roughness was different ( p < 0.05) for Z350 when brushed with RDA* 68 after AAA. Conclusions Dentifrice abrasiveness did not interfere in the ability to remove stains and roughness from aged samples. However, staining is material-dependent. Clinical significance The abrasiveness of dentifrice does not change the color and surface roughness of the composites and does not help to remove surface stains from the aged samples.
Editor: England: Elsevier Ltd
Idioma: Inglés;Persa

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Effect of brushing and accelerated ageing on color stability and surface roughness of composites

Roselino, Lourenço de Moraes Rego ; Cruvinel, Diogo Rodrigues ; Chinelatti, Michelle Alexandra ; Pires-de-Souza, Fernanda de Carvalho Panzeri

England: Elsevier Ltd

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