H Forville, M W Favoreto, T S Carneiro, Rmo Terra, L A Pinheiro, Cpf Borges, A D Loguercio, A Reis
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引用次数: 1
Abstract
Objectives: This in vitro study aimed to evaluate the bleaching efficacy (BE), hydrogen peroxide penetration into the pulp chamber (HPP), and physical-chemical properties (concentration, pH, and viscosity) of in-office bleaching gels immediately and after 1 week of mixing.
Methods and materials: We randomly divided 49 premolars into seven groups: control (no bleaching) and the following in-office bleaching (Opalescence Boost 40%, Total Blanc One Step 35%, and Whiteness HP Blue 35%) applied at two storage times: immediately and after 1 week. We evaluated the BE using a digital spectrophotometer and the HPP through UV-Vis spectroscopy. We measured the initial concentration, pH, and viscosity using titration, a Digital pH meter and Rheometer, respectively. For statistical analysis, we used a twoway analysis of variance and Tukey and Dunnet tests (α=0.05).
Results: We observed higher BE and HPP for Opalescence Boost and Total Blanc One Step after 1 week of mixing than for Whiteness HP Blue (p<0.001). We observed a significantly lower initial concentration for Whiteness HP Blue 1 week after mixing compared to immediately (p=0.00001). All bleaching gels showed a decrease in pH after 1 week of mixing (p=0.00003). However, Total Blanc One Step had a lower pH at both evaluation times (p<0.001). Only Opalescence Boost maintained viscosity 1 week after mixing.
Conclusions: Opalescence Boost was the only bleaching gel able to keep bleaching efficacy, with the same characteristics of permeability and physical- chemical properties after 1 week of mixing.
目的:本体外研究旨在评估即刻和混合1周后的漂白凝胶的漂白功效(BE)、过氧化氢进入髓腔(HPP)以及物理化学性质(浓度、pH和粘度)。方法和材料:我们将49颗前磨牙随机分为7组:对照组(不漂白)和办公室漂白(乳白增强40%,全白一步35%,白度HP蓝35%),分别在两个储存时间:立即和1周后进行。我们使用数字分光光度计和HPP通过紫外可见光谱来评估BE。我们分别用滴定法、数字pH计和流变仪测量了初始浓度、pH值和粘度。统计分析采用双方差分析和Tukey和Dunnet检验(α=0.05)。结果:与white white HP Blue混合1周后,Opalescence Boost和Total Blanc One Step的BE和HPP均高于white white HP Blue。结论:Opalescence Boost是唯一一种混合1周后仍能保持漂白效果的漂白凝胶,其渗透性和理化性质基本相同。
期刊介绍:
Operative Dentistry is a refereed, international journal published bi-monthly and distributed to subscribers in over 50 countries. In 2012, we printed 84 articles (672 pages). Papers were submitted by authors from 45 countries, in the categories of Clinical Research, Laboratory Research, Clinical Techniques/Case Presentations and Invited Papers, as well as Editorials and Abstracts.
One of the strong points of our journal is that our current publication time for accepted manuscripts is 4 to 6 months from the date of submission. Clinical Techniques/Case Presentations have a very quick turnaround time, which allows for very rapid publication of clinical based concepts. We also provide color for those papers that would benefit from its use.
The journal does not accept any advertising but you will find postings for faculty positions. Additionally, the journal also does not rent, sell or otherwise allow its subscriber list to be used by any other entity