title: Effect of tooth-whitening strips and films on changes in color and surface roughness of resin composites.
abstract: Though the effectiveness of film and strip type tooth-whitening agents on the bleaching of tooth has been confirmed, there have been few studies on their influence on restorative materials. The purpose was to investigate the effect of tooth-whitening film and strip on the changes in color and surface roughness of dental resin composites. The composites used were Filtek Supreme (3M ESPE), Point 4 (Kerr), and Spectrum TPH (Dentsply). Specimens were prepared 10 mm in diameter and 1 mm in thickness. Film type (Night Effect, Crest; Simply White Night, Colgate) and strip type (Whitestrips Professional, Crest; Claren, LG) agents were used, and bleaching procedures were performed for 2 weeks according to the manufacturers' recommendations. Color was measured according to the CIELab color scale with a spectrophotometer. Color difference ( DeltaE(*)(ab)) and surface roughness ( Ra) were measured. After bleaching, the DeltaE(*)(ab) values were 0.90-1.67, which was too small to be perceptible (<3.3). The increase in Ra values was significant in some composite-whitening agent combinations ( P<0.01), however the value was less than 0.30 microm after bleaching. Therefore the change in surface roughness was clinically insignificant. We conclude that the influence of tooth-whitening film and strip on the color and surface roughness of dental resin composites was negligible.
authors.affiliation: Department of Dental Biomaterials Science, College of Dentistry, Seoul National University, 28 Yeongeon-dong, Jongro-gu, Seoul, Korea.
authors.forename: Ji-Hyung
authors.initials: JH
authors.lastname: Kim
authors.forename: Yong-Keun
authors.initials: YK
authors.lastname: Lee
authors.forename: Bum-Soon
authors.initials: BS
authors.lastname: Lim
authors.forename: Sang-Hoon
authors.initials: SH
authors.lastname: Rhee
authors.forename: Hyeong-Cheol
authors.initials: HC
authors.lastname: Yang
mesh_terms: D000704:Analysis of Variance; D000077463:Carbamide Peroxide; D002254:Carbonates; D003116:Color; D003188:Composite Resins; D003742:Dental Devices, Home Care; D004338:Drug Combinations; D006801:Humans; D006861:Hydrogen Peroxide; D008422:Materials Testing; D016877:Oxidants; D010545:Peroxides; D018709:Statistics, Nonparametric; D013499:Surface Properties; D014073:Tooth Bleaching; D014508:Urea / Q000031:analogs & derivatives*
chemical_list: D002254:Carbonates; D003188:Composite Resins; D004338:Drug Combinations; C474035:Filtek Supreme; D016877:Oxidants; D010545:Peroxides; C467914:TPH spectrum; C451741:point 4 composite resin; D000077463:Carbamide Peroxide; D014508:Urea; D006861:Hydrogen Peroxide; C034738:sodium percarbonate