Effects of temperature and in-office bleaching agents on surface and subsurface properties of aesthetic restorative materials
Effects of temperature and in-office bleaching agents on surface and subsurface properties of aesthetic restorative materials
复制标题
温度和办公室漂白剂对美容修复材料表面和地下特性的影响。
DOI：
10.1016/j.jdent.2013.07.015
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发表时间：
2013-12-01
影响因子：
4.4
通讯作者：
Cheng, Hui
中科院分区：
文献类型：
--
作者：
Yu, Hao;Li, Qing;Cheng, Hui
目的：为了探讨在办公室漂白剂对牙科材料在不同的环境temperature.Methods的表面和亚表面性能的影响：四个复合树脂，复合体，传统的玻璃离子水门汀（CGIC），和工业烧结陶瓷材料进行了评价，在本研究中。每种材料处理4组（n = 10）：在25 ℃和37 ℃下用40%过氧化氢漂白，在25 ℃和37 ℃下储存在人工唾液中。漂白组的标本在各自的温度下漂白两次，每次20 min。漂白后，表面和亚表面（0.1-0.5 mm）的显微硬度进行了评估，使用维氏显微硬度计。通过表面轮廓术测定物质损失。数据进行了统计分析，方差分析和Tukey的事后test.Results：所有的材料被发现有漂白后的表面软化，和漂白效果的表面显微硬度增加在37摄氏度相比，25摄氏度C，除了陶瓷。在37 ℃下漂白后，与在37 ℃下储存的对照试样相比，可流动复合树脂的显微硬度值在0.1mm深度处显著降低。对照和漂白标本之间没有显着差异被发现就物质损失的任何material.Conclusion：在办公室漂白牙科材料的表面和亚表面显微硬度的影响的环境温度是材料依赖性的。然而，没有物质损失被检测到由于测试的漂白regione.Clinical意义：环境温度时，应考虑评估可能的漂白效果的修复材料。此外，牙医应该意识到，在临床情况下，可能需要抛光修复材料，其中漂白剂意外暴露于漂白凝胶。(C)2013爱思唯尔有限公司保留所有权利。
Objectives: To investigate the effects of in-office bleaching agents on surface and subsurface properties of dental materials at different environmental temperatures.Methods: Four composite resins, a compomer, a conventional glass-ionomer cement (CGIC), and an industrially sintered ceramic material were evaluated in the present study. Four groups of each material (n = 10) were treated: bleaching with 40% hydrogen peroxide at 25 degrees C and 37 degrees C, stored in artificial saliva at 25 degrees C and 37 degrees C. The specimens from bleaching groups were bleached for two sessions, each of two 20 min application, at respective temperatures. After bleaching, the surface and subsurface (0.1-0.5 mm) microhardness were evaluated using a Vickers microhardness tester. The substance loss was determined by surface profilometry. The data were statistically analyzed with ANOVA and the Tukey's post hoc test.Results: All materials were found to have surface softening after bleaching, and bleaching effects on surface micorhardness increased at 37 degrees C compared with 25 degrees C, except for the ceramic. After being bleached at 37 degrees C, the microhardness values of flowable composite resin significantly reduced at a depth of 0.1 mm compared with control specimen stored at 37 degrees C. No significant difference was found between the control and bleached specimens with respect to substance loss for any of the materials.Conclusion: The influence of environmental temperature on the in-office bleaching effects on surface and subsurface microhardness of dental materials was material-dependent. However, no substance loss was detected due to the tested bleaching regimen.Clinical significance: Environmental temperature should be considered when evaluating the possible bleaching effects on restorative materials. Moreover, dentists should be aware that there might be a need for polishing of restorative materials in clinical situations in which restorations are accidentally exposed to bleaching gels. (C) 2013 Elsevier Ltd. All rights reserved.