评估抗坏血酸钠水凝胶的浓度和应用持续时间对复合树脂与漂白牙釉质粘结强度的影响。
Evaluation of the effect of concentration and duration of application of sodium ascorbate hydrogel on the bond strength of composite resin to bleached enamel.
作者信息
Dabas Deepti, Patil Anand C, Uppin Veerendra M
机构信息
Department of Conservative Dentistry and Endodontics, KLE VK Institute of Dental Sciences, Belgaum, Karnataka, India.
出版信息
J Conserv Dent. 2011 Oct;14(4):356-60. doi: 10.4103/0972-0707.87197.
Abstract
AIM
The effect of different concentrations of hydrogel of sodium ascorbate on bond strength of bleached enamel for varying periods of time and the mode of failure was evaluated.
MATERIALS AND METHODS
Seventy enamel surfaces were obtained from 35 human extracted premolars. Specimens were divided into four groups: no bleaching (control), bleaching with carbamide peroxide gel, bleaching and application of 10% / 20% sodium ascorbate hydrogel for 30, 60, 120 min. Surfaces were bonded with a total etch bonding system and composite resin. Specimens were tested for shear bond strength. Mode of failure was determined by stereomicroscope. Data were analyzed using a two-way analysis of variance, and Scheffe's post hoc test.
RESULTS
Sodium ascorbate hydrogel application following bleaching increased the resin-enamel bond strength and was directly proportional to its duration of application. However, there was no difference in bond strength with an increase in the concentration of sodium ascorbate hydrogel.
CONCLUSION
Immediate bonding of composite resin to bleached enamel is possible after treatment with antioxidant sodium ascorbate hydrogel.
摘要
目的
评估不同浓度的抗坏血酸钠水凝胶在不同时间段对漂白釉质粘结强度的影响以及失效模式。
材料与方法
从35颗拔除的人类前磨牙获取70个釉质表面。样本分为四组：未漂白（对照组）、用过氧化脲凝胶漂白、漂白并应用10%/20%抗坏血酸钠水凝胶30、60、120分钟。表面用全酸蚀粘结系统和复合树脂粘结。对样本进行剪切粘结强度测试。通过体视显微镜确定失效模式。数据采用双向方差分析和谢费尔事后检验进行分析。
结果
漂白后应用抗坏血酸钠水凝胶可提高树脂 - 釉质粘结强度，且与应用持续时间成正比。然而，随着抗坏血酸钠水凝胶浓度增加，粘结强度并无差异。
结论
用抗氧化剂抗坏血酸钠水凝胶处理后，复合树脂可立即粘结到漂白釉质上。
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