Surface texture changes of a composite brushed with “tooth whitening” dentifrices

Whitehead, S.A.; Shearer, Ann; Watts, D.C.; Wilson, Nairn

doi:10.1016/s0109-5641(96)80040-6

Cited by 31 publications

(29 citation statements)

References 10 publications

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“…Also, García-Godoy and others 11 found similar results. Contrary to these findings, Çehreli and others 31 and Whitehead and others 32 showed that resin composites were significantly affected by bleaching agents. These contrary findings might be due to several factors, such as composition of the materials, concentration of bleaching agents and the methodology used in different studies.…”

Section: Discussionmentioning

confidence: 80%

Surface Hardness of Resin Composites After Staining and Bleaching

Ökte

Villalta

Garcı́a-Godoy

et al. 2006

Operative Dentistry

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SUMMARYThis study investigated the effect of 3 staining solutions and 3 over-the-counter tooth-bleaching systems on the microhardness of 2 dental resin composites. Forty-five specimens of Filtek Supreme and Esthet-X were randomly assigned to 3 groups. Over a 40-day test period, the specimens in each group (n=15) were immersed in 1 of the 2 staining solutions (coffee and red wine) or distilled water as the control for 3 hours a day at room temperature. The 15 specimens in each staining group were further randomly divided into 3 subgroups, and the specimens in each subgroup (n=5) were bleached using one of the bleaching agents (Night Effects, Simply White Night and Opalescence Quick). Surface hardness was measured at 24 hours after polymerization (baseline), after staining and after bleaching. Means and standard deviations were calculated, and the data were analyzed using repeatedmeasures analysis of variance and Duncan's Test. The microhardness of Esthet-X was significantly higher than Filtek Supreme at baseline (p<0.01). All specimens of both materials immersed in coffee and wine revealed a significant hardness decrease compared to baseline values (p<0.05). In the control group, microhardness was increased, and this increase was statistically significant for Filtek Supreme (p<0.05). After bleaching, there was a significant decrease in mean microhard-

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Section: Discussionmentioning

confidence: 80%

Surface Hardness of Resin Composites After Staining and Bleaching

Ökte

Villalta

Garcı́a-Godoy

et al. 2006

Operative Dentistry

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“…Several authors 27,28,29,30 have stated the importance of choosing adequate parameters for surface roughness measurements. Because the Ra parameter is limited to horizontal measurements 27,28,29 , different surfaces could present the same roughness values, thus rendering the results questionable.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of surface physical properties of acrylic resins for provisional prosthesis

et al. 2008

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Acrylic resins used for provisional prostheses should have satisfactory superficial characteristics in order to ensure gingival health and low bacterial attachment. The purpose of the present study was to evaluate the superficial roughness and contact angle after two types of polishing and the Vickers hardness of three acrylic resins (Duralay -G1, Dencrilay -G2, and Dencor -G3), all shade 66, indicated for provisional fixed prostheses. Five 20 x 3 ± 1 mm diameter discoid specimens were obtained for each group. One side of the specimens was subjected to standard polishing (pumice and whiting slurry), and the opposite side was polished with special tips. The mean roughness and contact angles of the materials were measured. The specimens were subjected to the Vickers microhardness test, which indicated that standard polishing produced a surface roughness equivalent to that of the special tips. The contact angles obtained with the standard polishing were equivalent to those observed in the special tips group. The microhardness of G1 and G3 resins showed statistical differences.

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“…2-3, 8,14 However, the application of bleaching agents followed by brushing with abrasive toothpastes has not been extensively evaluated. 3,7,[17][18] The desiccation loss test showed different values among the groups, indicating toothpastes with different compositions. G1 (Sorriso Dentes Brancos  ) presented the lowest loss by desiccation and the highest values of ash content (solid residues).…”

Section: Discussionmentioning

confidence: 99%

“…Toothpaste compositions could be responsible for different changes to the enamel surface. [3][4][5][10][11][12] Fluoride's ability to form a protective film on the enamel surface has been established. 1,7,9,14 However, the presence of fluoride in the bleaching gels did not increase mineral recovery.…”

Section: Discussionmentioning

confidence: 99%

“…[1][2] This growing demand for an enhanced esthetic appearance has led to great development of bleaching products. [3][4][5] The color of teeth is influenced by a combination of their intrinsic color and the presence of any extrinsic stains that may form on the tooth surface. 6 The active components of the whitening toothpastes include surfactants, polyphosphates and enzymes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Physical-chemical characteristics of whitening toothpaste and evaluation of its effects on enamel roughness

et al. 2011

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This in vitro study evaluated the physical-chemical characteristics of whitening toothpastes and their effect on bovine enamel after application of a bleaching agent (16% carbamide peroxide). Physical-chemical analysis was made considering mass loss by desiccation, ash content and pH of the toothpastes. Thirty bovine dental enamel fragments were prepared for roughness measurements. The samples were subjected to bleaching treatments and simulated brushing: G1. Sorriso Dentes Brancos (Conventional toothpaste), G2. Close-UP Whitening (Whitening toothpaste), and G3. Sensodyne Branqueador (Whitening toothpaste). The average roughness (Ra) was evaluated prior to the bleaching treatment and after brushing. The results revealed differences in the physical-chemical characteristics of the toothpastes (p < 0.0001). The final Ra had higher values (p < 0.05) following the procedures. The mean of the Ra did not show significant differences, considering toothpaste groups and bleaching treatment. Interaction (toothpaste and bleaching treatment) showed significant difference (p < 0.0001). The whitening toothpastes showed differences in their physical-chemical properties. All toothpastes promoted changes to the enamel surface, probably by the use of a bleaching agent.

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Surface texture changes of a composite brushed with “tooth whitening” dentifrices

Cited by 31 publications

References 10 publications

Surface Hardness of Resin Composites After Staining and Bleaching

Surface Hardness of Resin Composites After Staining and Bleaching

Evaluation of surface physical properties of acrylic resins for provisional prosthesis

Physical-chemical characteristics of whitening toothpaste and evaluation of its effects on enamel roughness

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