样品预染色对过氧化氢凝胶体外美白效果的影响。

IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
A B Borges, K C Dos Santos, D F da Silva, V C Bottesini, Crg Torres, M C Mailart
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引用次数: 0

摘要

目的:各种体外方法被用来评估美白效果,使用染色和未染色的牙基质,这可能会影响结果。本研究旨在探讨不同浓度过氧化氢(HP)凝胶体外染色对牙釉质表面及美白效果的影响。方法:按HP浓度[20% (HP20)、30% (HP30)、40% (HP40)和去离子水(阴性对照)]随机分为牛牙釉质/牙本质标本16份;底物状态(未染色或染色)。用分光光度计测量牙齿颜色,计算色差(ΔE00)和白度指数(WID和ΔWID)。测定不同时间牙釉质的表面显微硬度(SMH)和粗糙度(Ra)。采用方差分析和Tukey事后检验对未染色和染色底物的数据进行分析(α结果:在不同HP浓度和底物条件下,ΔE00中观察到显著差异(p结论:未染色底物和染色底物的漂白模式相似,HP漂白凝胶浓度越高,牙齿颜色差异越大。先前的染色增加了漂白后白度值的变化(ΔWID),但与未染色的基质相比,漂白后的标本保持较低的白度指数。染色引起牙釉质表面的改变。这些因素表明,在评估漂白凝胶的美白效果时,对标本进行预染色并不是必要的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Specimen Pre-staining on in vitro Whitening Efficacy of Hydrogen Peroxide Gels.

Objectives: Various in vitro approaches have been used to evaluate whitening efficacy, utilizing both stained and non-stained tooth substrates, which may influence the outcomes. This study aimed to assess the effect of previous in vitro staining on whitening efficacy and the enamel surface using hydrogen peroxide (HP) gels with different concentrations.

Methods: Bovine enamel/dentin specimens (n=16) were randomly allocated into groups according to the HP concentration [20% (HP20), 30% (HP30), 40% (HP40), and deionized water (negative control)]; and substrate condition (non-stained or stained). Tooth color was measured using a spectrophotometer, and the color difference (ΔE00) and whiteness index (WID and ΔWID) were calculated. Knoop surface microhardness (SMH) and roughness (Ra) of enamel were assessed at different times. Data from both non-stained and stained substrates were analyzed using ANOVA and Tukey post hoc tests (α<0.05).

Results: Significant differences were observed in ΔE00 for different HP concentrations and substrate conditions (p<0.001). Greater tooth color change was found for HP40, followed by HP30 and HP20. Stained groups exhibited higher ΔE00 values than non-stained ones, except for HP20. Higher values of ΔWID were observed in stained/bleached groups. The staining process reduced SMH and increased Ra.

Conclusions: The bleaching patterns were similar for both non-stained and stained substrates, with higher concentrations of HP bleaching gels resulting in greater tooth color difference. Previous staining increased the variation in whiteness values (ΔWID) following bleaching, but specimens maintained a lower whiteness index after bleaching compared to the non-stained substrate. Staining induced alterations on the enamel surface. These factors indicate that pre-staining of specimens is not essential to evaluate the whitening efficacy of bleaching gels.

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来源期刊
Operative dentistry
Operative dentistry 医学-牙科与口腔外科
CiteScore
4.00
自引率
9.10%
发文量
124
审稿时长
6-12 weeks
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
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