Efficacy and effects on enamel of low and high-concentrated bleaching gels for at-home and in-office techniques.

IF 1.2 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
American journal of dentistry Pub Date : 2025-08-01
Victor C Bottesini, Douglas F D A Silva, Tatiana P Prado, Carlos R G Torres, Alessandra B Borges, Mariane C Mailart
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引用次数: 0

Abstract

Purpose: To evaluate the efficacy of low and high-concentrated bleaching gels in both at-home and in-office techniques and their effects on enamel properties.

Methods: Bovine enamel/dentin specimens were randomly allocated to five groups (n=12): deionized water (negative control - DW), 6% hydrogen peroxide (6HP), 40% hydrogen peroxide (40HP), 10% carbamide peroxide (10CP), and 45% carbamide peroxide (45CP). For 6HP and 40HP, the gel was applied 3x20 minutes in 1 day. For 10CP and 45CP, the bleaching gels were applied 1x/day for 8 hours and 1x/day for 30 minutes over 7 days, respectively. Before and after bleaching treatment, color (CIE L*a*b*), surface microhardness (SMH), roughness (Ra), and gloss (GU) were assessed. Alterations in color (ΔE₀₀ and ΔWID), SMH (%SMHalt), Ra (%Raalt) and GU (%GUalt) were calculated. Data were analyzed by one-way ANOVA and Tukey's test (α= 0.05).

Results: Significant differences were found for color alteration (P< 0.05). The group 10CP showed the highest color difference. The groups 40HP, 10CP, and 45CP exhibited similar values of ΔWID. No alteration in enamel microhardness and roughness was found (P> 0.05). Although significant differences were found for %GUalt between the groups (P< 0.05), they were not different from the negative control. The 10% carbamide peroxide resulted in the highest color alteration, while all tested bleaching gels were effective in producing color change that exceeded the acceptability threshold without causing damage to the enamel surface.

Clinical significance: All bleaching gels can be considered safe in the tested protocol, and the greatest color difference was promoted by 10% carbamide peroxide overnight.

家用和办公室用低浓度和高浓度漂白凝胶对牙釉质的功效和影响。
目的:评价低浓度和高浓度漂白凝胶在家庭和办公室技术中的效果及其对牙釉质性能的影响。方法:牛牙釉质/牙本质标本随机分为去离子水(阴性对照- DW)、6%过氧化氢(6HP)、40%过氧化氢(40HP)、10%过氧化脲(10CP)和45%过氧化脲(45CP) 5组(n=12)。对于6HP和40HP,凝胶在1天内涂敷3 × 20分钟。对于10CP和45CP,漂白凝胶分别使用1次/天,持续8小时,1次/天,持续30分钟,持续7天。漂白处理前后对颜色(CIE L*a*b*)、表面显微硬度(SMH)、粗糙度(Ra)、光泽度(GU)进行评估。计算颜色(ΔE 0 0和ΔWID)、SMH (%SMHalt)、Ra (%Raalt)和GU (%GUalt)的变化。资料采用单因素方差分析和Tukey检验(α= 0.05)。结果:色差差异有统计学意义(P< 0.05)。10CP组色差最大。40HP、10CP和45CP组的ΔWID值相似。牙釉质显微硬度和粗糙度无明显变化(P < 0.05)。两组间的%GUalt差异有统计学意义(P< 0.05),但与阴性对照组差异无统计学意义。10%过氧化脲导致最高的颜色变化,而所有测试的漂白凝胶都有效地产生超过可接受阈值的颜色变化,而不会对牙釉质表面造成损害。临床意义:在测试方案中,所有的漂白凝胶都可以认为是安全的,10%过氧化脲隔夜促进色差最大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
American journal of dentistry
American journal of dentistry 医学-牙科与口腔外科
CiteScore
2.40
自引率
7.10%
发文量
57
审稿时长
1 months
期刊介绍: The American Journal of Dentistry, published by Mosher & Linder, Inc., provides peer-reviewed scientific articles with clinical significance for the general dental practitioner.
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