Comparative study of the effectiveness of different bleaching agents on blood-colored extracted teeth and investigation of recoloring after bleaching: an in vitro experimental study.

IF 1.5
Restorative Dentistry & Endodontics Pub Date : 2025-08-01 Epub Date: 2025-07-09 DOI:10.5395/rde.2025.50.e22
Gülşen Arslan, Akın Aladağ, Ayşegül Demirbaş, Murat Türkün
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Abstract

Objectives: This study evaluated the efficacy of three distinct bleaching agents over time on blood-stained, devitalized teeth. Furthermore, the recoloring subsequent to bleaching will be monitored.

Methods: The study was conducted on 60 caries-free, unfilled, upper human incisors. The Freccia and Peters blood staining technique was employed, and four groups (n = 15) were identified: control, 35% hydrogen peroxide-treated, 37% carbamide peroxide-treated, and sodium perborate-treated groups. Color differences were measured using ΔE00, ΔWID, L*, a*, and b* values. To investigate tooth discoloration after bleaching, 10 unbleached teeth with three groups of 10 bleached teeth were compared by vine staining. The group of bleached teeth was restored immediately, another group waited one week, and the third group had sodium ascorbate applied and analyzed using one-way analysis of variance tests (p < 0.05).

Results: Among the groups, carbamide peroxide exhibited the most significant whitening during the 6-day bleaching process, followed by hydrogen peroxide and sodium perborate. Subsequent examination of the wine recoloring of post-bleaching samples demonstrated that bleached teeth exhibited a heightened propensity for recoloration in contrast to unbleached teeth. Notably, sodium ascorbate treatments for hydrogen peroxide neutralization and the wait-and-restore approach were not statistically significant in terms of preventing recoloration.

Conclusions: Sodium perborate is less effective and more time-consuming than hydrogen peroxide or carbamide peroxide for bleaching purposes. Carbamide peroxide is the most effective bleaching agent. The sodium ascorbate treatment and the wait-and-restore approach are ineffective in preventing recoloring. Bleached teeth have more discoloration than unbleached teeth.

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不同漂白剂对血色拔牙效果的比较研究及漂白剂后再着色的研究:体外实验研究。
目的:本研究评估了三种不同的漂白剂随时间对血染、失活牙齿的疗效。此外,我们亦会监察漂白后的再着色情况。方法:对60例无龋、未充填的上颌切牙进行研究。采用Freccia和Peters血液染色技术,分为4组(n = 15):对照组、35%过氧化氢处理组、37%过氧化脲处理组和过硼酸钠处理组。使用ΔE00, ΔWID, L*, a*和b*值测量色差。为了观察牙齿漂白后的变色情况,将10颗未漂白的牙齿与3组10颗漂白的牙齿进行葡萄染色比较。牙齿漂白组立即修复,另一组等待1周,第三组应用抗坏血酸钠,采用单因素方差分析(p < 0.05)。结果:在6天的漂白过程中,过氧化脲的美白效果最显著,其次是过氧化氢和过硼酸钠。随后对漂白后的葡萄酒再着色样品的检查表明,与未漂白的牙齿相比,漂白的牙齿表现出更高的再着色倾向。值得注意的是,抗坏血酸钠治疗过氧化氢中和和等待恢复方法在预防再着色方面没有统计学意义。结论:与过氧化氢或过氧化脲相比,过硼酸钠的漂白效果较差,且更耗时。过氧化脲是最有效的漂白剂。抗坏血酸钠治疗和等待恢复方法对防止再着色无效。漂白的牙齿比未漂白的牙齿更容易变色。
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CiteScore
0.20
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0.00%
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35
审稿时长
12 weeks
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