The Effect of Hydrogen Peroxide With Different Concentration on the Color and Surface Microhardness of the Resin Bracket

IF 2.2 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Clinical and Experimental Dental Research Pub Date : 2025-09-08 DOI:10.1002/cre2.70210

Song-Yi Yang

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引用次数: 0

Abstract

Objectives

This study aimed to evaluate the whitening effect, shear bond strength (SBS), microhardness, and microstructure of discolored resin brackets following whitening treatment with various concentrations of hydrogen peroxide (HP).

Material and Methods

Resin brackets were bonded to the enamel surface and discolored with a curry solution. Control (distilled water; DW) and experimental solutions of 8.7%, 17.5%, and 35% HP were applied to the discolored resin brackets for 15 min. Resin brackets were then stored in DW for a week by repeating this whitening process three times. The whitening efficacy was evaluated according to the ISO 28399:2011. The SBS was measured using a universal testing machine. The microhardness and microstructure of the resin brackets were observed using a microhardness tester and field-emission scanning electron microscopy (FE-SEM). All the results were analyzed using a one-way ANOVA analysis and Tukey's post-hoc test (p = 0.05).

Results

All the experimental groups demonstrated a significant whitening effect on the discolored resin brackets compared to the control group (p < 0.05). Especially, 35% HP showed faster color changes than the other groups (p < 0.05). The microhardness of the resin bracket was significantly lower in 35% HP compared to the control group (p < 0.05). FE-SEM analysis revealed no significant difference between the experimental and control groups.

Conclusions

HP application at concentrations of > 8.7% and < 17.5% is effective in whitening discolored resin brackets while not deteriorating the SBS, surface hardness, and microstructure. Dental clinicians can safely use HP within the recommended range to achieve effective esthetic outcomes without compromising bracket performance and durability.

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不同浓度过氧化氢对树脂支架颜色及表面显微硬度的影响

目的研究不同浓度过氧化氢（HP）对变色树脂托槽的增白效果、剪切结合强度（SBS）、显微硬度和显微结构的影响。材料与方法树脂托槽粘接在牙釉质表面，用咖喱溶液染色。对照（蒸馏水；DW）和实验溶液分别为8.7%、17.5%和35% HP，作用于变色树脂支架15 min。然后树脂支架在DW中储存一周，重复此美白过程三次。美白效果按照ISO 28399:2011进行评价。SBS是用通用试验机测量的。采用显微硬度计和场发射扫描电镜（FE-SEM）观察树脂支架的显微硬度和微观结构。所有结果采用单因素方差分析和Tukey事后检验（p = 0.05）进行分析。结果与对照组相比，各实验组对树脂托槽变色的美白效果均显著（p < 0.05）。特别是35% HP组的颜色变化比其他组快（p < 0.05）。35% HP组树脂托槽的显微硬度明显低于对照组（p < 0.05）。FE-SEM分析显示实验组与对照组之间无显著差异。结论8.7%和17.5% HP对变色树脂托槽有较好的美白效果，但对SBS、表面硬度和显微组织无明显影响。牙科临床医生可以安全地在推荐范围内使用HP，以达到有效的美观效果，而不会影响支架的性能和耐用性。

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来源期刊

Clinical and Experimental Dental Research DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.30

自引率

5.60%

发文量

165

审稿时长

26 weeks

期刊介绍： Clinical and Experimental Dental Research aims to provide open access peer-reviewed publications of high scientific quality representing original clinical, diagnostic or experimental work within all disciplines and fields of oral medicine and dentistry. The scope of Clinical and Experimental Dental Research comprises original research material on the anatomy, physiology and pathology of oro-facial, oro-pharyngeal and maxillofacial tissues, and functions and dysfunctions within the stomatognathic system, and the epidemiology, aetiology, prevention, diagnosis, prognosis and therapy of diseases and conditions that have an effect on the homeostasis of the mouth, jaws, and closely associated structures, as well as the healing and regeneration and the clinical aspects of replacement of hard and soft tissues with biomaterials, and the rehabilitation of stomatognathic functions. Studies that bring new knowledge on how to advance health on the individual or public health levels, including interactions between oral and general health and ill-health are welcome.