Comparison of bleeching effect of two Tooth-whitening lacquer containing 16% carbamide peroxide on maxillary canines

Abstract

Introduction: Tooth discoloration is a common problem that can be seen in all teeth. Vital teeth are traditionally whitened with two different methods called a power bleaching method. The predominant type of peroxide used to bleach vital teeth is pure hydrogen peroxide or carbamide peroxide. The demand for bleaching has increased significantly in recent years. Toothpastes are made for this purpose, which is a personal device that does not require any mouth guard.

Method and Materials: In this clinical trial study, 20 adults over 18 years of age seeking bleaching treatment at home referred to the Faculty of Dentistry of Tabriz University were selected and divided into two groups. In the first group, 10 people in the first group covered their maxillary canines with Vi-one toothpaste once a day for 2 weeks and after 20 minutes, they washed with water, toothbrush and toothpaste, and the next 10 people in the group The second method was done with white smile toothpaste. Then the color of the middle third of the studied teeth was measured at 1, 7, 14 and 21 days by tooth shade guide chromascope. All measurements were performed in exactly the same environment and in room light (before noon). Statistical analysis was performed using SPSS 25 software and Chi-square test was used. Results: The results showed that in general, on the first day and the seventh day of bleaching, the amount of tooth darkness was similar (P> 0.05). These rates were also reported to be similar in each group of dental varnish. At 21 days, the number of teeth with low degree of opacity increased so that 15 teeth had degrees of opacity 2 and 3, of which 7 teeth belonged to Vi-One group and 8 teeth belonged to White Smile group. In the White Smile group, no teeth with grade 2 blur were observed for 14 days. The rate of color change in each group was compared between different times, which showed that in the Vi-One group this difference was statistically insignificant (P = 0.252) but in the White Smile group this difference was reported to be significant (P = 0.027). Conclusion: According to the results of this study, in the White smile group, the difference in shades before and after bleaching was significant, but in the Vi-One group, this difference in shades was not significant. Also, no difference was observed in Vi-one and White smile groups on the studied days.