Color stability and surface roughness of composite resins submitted to brushing with bleaching toothpastes: An in situ study

Author(s)

Rego Roselino, Lourenco de Moraes ^[1] ; Torrieri, Rafaella Tonani ^[1] ; Sbardelotto, Cristian ^[1] ; Amorim, Ayodele Alves ^[1] ; Ferraz de Arruda, Carolina Noronha ^[1] ; Tirapelli, Camila ^[1] ; Panzeri Pires-de-Souza, Fernanda de Carvalho ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Dent Mat & Prosthodont, Ribeirao Preto Sch Dent, Ave Cafe S-N, BR-14040904 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Journal of Esthetic and Restorative Dentistry; v. 31, n. 5, p. 486-492, SEP 2019.
• Web of Science Citations: 0

Abstract

Objective To evaluate, in situ, the color stability (CS) and surface roughness (SR) of composite resins after toothbrushing with whitening toothpaste. Materials and Methods Specimens (6 x 2 mm/) of composite resin (Tetric N-Ceram, Z250 and Z350) were randomly fixed on thirty participants' upper molars (buccal surface). For an initial standardization (7 days), participants used a soft toothbrush and nonwhitening toothpaste (SDB - Sorrisos Dentes Brancos). Initial CS (Easyshade) and SR (Surfcorder RS) measurements were performed. For SR, impressions of specimens were taken (Express, 3 M ESPE) to produce replicas in polyurethane resin (Axon F16, Abcol). Participants were randomly separated into three groups (n = 10) regarding used toothpaste (SDB; Close up White Now - CWN; Colgate Luminous White - CLW). After 90 days, CS and SR measurements were obtained, and data were analyzed (2-way ANOVA, repeated measures, Bonferroni, P < .05). Results Z250 showed higher (P < .05) color change than Z350. Tetric N-Ceram presented an intermediary value for Delta E, however, it also demonstrated higher SR (P < .05) after brushing with CLW, compared with SDB and CWN. Conclusions The SR change of composite resin after toothbrushing with a whitening toothpaste is material dependent, but the toothpaste abrasiveness does not change the CS. Clinical significance Whitening toothpaste do not change the color stability of composites; however, it can alter the restorative composite surface roughness. (AU)

• FAPESP's process: 12/13342-4 - Clinical evaluation of color and surface roughness of dental enamel and dental composites submitted to brushing with whitening dentifrice
• Grantee: Lourenço de Moraes Rego Roselino
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/21831-5 - Clinical evaluation of color and surface roughness of dental enamel and dental composites submitted to brushing with whitening dentifrice
• Grantee: Fernanda de Carvalho Panzeri
• Support Opportunities: Regular Research Grants