Whitening effect of 35% hydrogen peroxide in simulation of tooth with orthodontic bracket

Abstract

Objective To evaluate the color change and tooth whitening perception in 2 and 3 mm dental specimens simulating the orthodontic bracket for a 14‐day period. Materials and methods Forty bovine tooth fragments (8 × 7 mm) of 2 mm (G2, n = 20) and 3 mm (G3, n = 20) were divided into Control (C: without bracket simulation and whitening) and Experimental (E: with composite resin simulating orthodontic bracket cementation area). Analyses of color change (ΔE00) and perception of tooth whitening (WID) were performed before (T0) and after (T1) the first bleaching session; before (T2) and after (T3) the second bleaching session; and after 7 days of the second bleaching session (T4). Results After 14 days (T4), ΔE00 and WID showed similarity results, except for G2C and G3E. The thickness did not influence the ΔE00 and WID (G2C = G3C and G2E = G3E). The presence of orthodontic bracket did not interfere in the color change or tooth whitening perception after 14 days, except for comparison of G2C and G3E. Additionally, dentin thickness did not influence the color change. Clinical significance Teeth with orthodontic brackets showed similar color change and whitening perception to teeth without orthodontic bracket, but it is not influenced by dentin thickness.

Efficacy of products for bleaching and whitening under orthodontic brackets

“…28,29 The in-office and at-home bleaching procedures showed statistically greater color changes and similarity around the bracket area, corroborating with previous studies. 18,19,21,22,25,30 The area under the bracket showed greater color alteration and tooth whiteness, when compared with the area around the bracket, for the non-whitening toothpaste, 2% hydrogen peroxide whitening toothpaste, and at-home bleaching procedure.…”

“…Although previous studies [14][15][16][17][18][19] have evaluated the efficacy of different dental bleaching agents under orthodontic brackets, no study has evaluated the whitening toothpastes. Since many patients wearing orthodontic appliances perceive changes in the shade of their teeth, and whitening toothpaste is an easily accessible product, 12 its efficacy needed to be tested.…”

“…Some whitening toothpastes have included peroxide in their formulations; however, the efficacy of peroxide from toothpaste is questioned regarding the concentration and exposure time during toothbrushing. 13 Previous clinical 14,15 and laboratory [16][17][18][19] studies have shown color alteration under the bracket area using bleaching agents. However, even with the increasing presence of whitening toothpastes on the market, the authors are unaware of a study that has been conducted to test their efficacy on teeth with bonded brackets.…”

Nanoparticles as Next-Generation Tooth-Whitening Agents: Progress and Perspectives

“…In a recent study, a simple method was suggested for evaluating the whitening effect of hydrogen peroxide on tooth stains. 272 Dental specimens of 2 and 3 mm were prepared by using an orthodontic bracket, and the color change and perception of tooth whitening were evaluated.…”

“…In the past, clinical trials have been directly conducted to confirm the effectiveness of certain whitening agents, but these are now outlawed. In a recent study, a simple method was suggested for evaluating the whitening effect of hydrogen peroxide on tooth stains . Dental specimens of 2 and 3 mm were prepared by using an orthodontic bracket, and the color change and perception of tooth whitening were evaluated.…”