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CC BY-NC-ND 4.0 · Eur J Dent 2020; 14(01): 085-091
DOI: 10.1055/s-0040-1705071
Original Article

Effect of an Optical Whitening Toothpaste on Color Stability of Tooth-Colored Restorative Materials

Sedighe Sadat Hashemikamangar
1   Department of Operative Dentistry, Dental School, Tehran University of Medical Sciences, Tehran, Iran
,
Farnoosh Hoseinpour
2   Operative Department, Tehran University of Medical Science, Tehran, Iran
,
Nazanin Kiomarsi
3   Department of Operative Dentistry, Dental School, Tehran University of Medical Sciences, Tehran, Iran
,
Mehrzad Gholampour Dehaki
4   Department of Internal Medicine and Endocrinology, Medical Faculty, Aja University of Medical Sciences, Tehran, Iran
,
Mohammad Javad Kharazifard
5   Department of Epidemiology and Biostatistics, Faculty of Public Health, Dental School, Tehran University of Medical Sciences, Tehran, Iran
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Abstract

Objectives This study aimed to assess the effect of an optical whitening toothpaste on color stability of microhybrid, nanofilled, and microfilled composite resins and resin-modified glass ionomer (RMGI) cement in comparison of two other toothpastes.

Materials and Methods In this experimental study, disc-shaped composite samples were fabricated. The samples were then polished using silicon carbide papers. Twenty-seven samples of each material were fabricated and subjected to colorimetry using a spectrophotometer. Each group of material was then divided into three subgroups for the application of conventional whitening and whitening containing blue covarine toothpastes. One operator brushed the samples with an electric soft toothbrush with circular motion twice a day, each time for 30 seconds. Colorimetry was performed at 0, 1, 7, 30, and 90 days.

Statistical Analysis Two-way analysis of variance (ANOVA), one-way ANOVA, and Tukey’s honestly significant difference (HSD) test were used for statistical analysis.

Results The interaction effect of type of restorative material and time on ∆E was not significant at baseline or 1 day (p > 0.05). The effect of type of toothpaste on ∆E was not significant at baseline or 1 day (p = 0.78) but the effect of type of material was significant (p < 0.05). The toothpastes had significantly different effects on ∆E of Z250 at all time points (p < 0.05) except for ∆E0–30 (p = 0.106). The toothpastes had significantly different effects on ∆E of Z350 and Gradia at all time points (p < 0.05). The same was true for RMGI except for ∆E0–7 (p = 0.43) and ∆E0–90 (p = 0.52). The majority of color changes caused by toothpastes were not clinically perceivable (∆E < 3.3), except for ∆E0–90 by the whitening toothpaste (∆E = 9), ∆E0–90 by the conventional toothpaste for Z350 (∆E = 3.9), and ∆E0–1 by the whitening toothpaste for RMGI (∆E = 3.7).

Conclusion The color change of all composite samples was not clinically perceivable (<3.3) at all time points, which shows that the tested toothpastes do not cause a significant change in color of composite materials.

Keywords

dental bleaching - dental materials - glass ionomer - composite resins - toothpastes - blue covarine


Publikationsverlauf

Artikel online veröffentlicht:
13. März 2020

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Thieme Medical and Scientific Publishers Private Ltd.
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