• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of bleaching agents on the microhardness of tooth-colored restorative materials.
【24h】

Effect of bleaching agents on the microhardness of tooth-colored restorative materials.

机译：漂白剂对牙齿有色修复材料的显微硬度的影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

STATEMENT OF PROBLEM: There is no consensus concerning the effect of bleaching gels on microhardness of restorative materials. Information about the effect of whitening strips on microhardness of restorative materials is also limited. PURPOSE: The purpose of this study was to evaluate the effect of a bleaching gel and a whitening strip on the microhardness of 3 tooth-colored restorative materials. MATERIAL AND METHODS: Forty cylindrical specimens (6 x 2 mm) of each restorative material, including a nanohybrid composite resin (Grandio), a polyacid-modified composite resin (Dyract eXtra), and a glass-ionomer cement (Ionofil Molar AC), were prepared and stored in distilled water at 37 degrees C for 24 hours. The specimens were then polished using medium, fine, and superfine polishing disks and stored in 37 degrees C distilled water for 7 days. Specimens were divided into 4 groups (n=10). One group was selected for baseline Vickers hardness measurements (load 100 g, dwell time 20 seconds) of the top surfaces. The other 3 groups were treated for 21 days with 1 of the following: distilled water (control), bleaching gel (10% carbamide peroxide), or whitening strip (14% hydrogen peroxide). The top surfaces of the treated specimens were also subjected to the same hardness testing performed for the baseline specimens. Data were analyzed with 2-way analysis of variance and Tukey Honestly Significant Difference tests (alpha=.05). RESULTS: There were no significant differences in microhardness between the test groups of each restorative material. However, significant differences in microhardness were observed among restorative materials. For all test groups, composite resin showed the highest hardness values, whereas glass-ionomer cement presented the lowest (P<.05). CONCLUSION: The bleaching products used in this study did not adversely affect the microhardness of the restorative materials.
机译：问题陈述：关于漂白凝胶对修复材料的显微硬度的影响尚无共识。关于增白条对修复材料的显微硬度影响的信息也很有限。目的：本研究的目的是评估漂白凝胶和增白条对三种牙齿着色修复材料的显微硬度的影响。材料与方法：每种修复材料的40个圆柱状样品（6 x 2毫米），包括纳米混合复合树脂（Grandio），多元酸改性复合树脂（Dyract eXtra）和玻璃离聚物水泥（Ionofil Molar AC），制备并在37℃的蒸馏水中储存24小时。然后使用中，细和超细抛光盘对样品进行抛光，并在37°C的蒸馏水中保存7天。标本分为4组（n = 10）。选择一组用于顶部表面的基准维氏硬度测量（负荷100 g，停留时间20秒）。其他3组用以下之一进行21天的处理：蒸馏水（对照），漂白凝胶（10％过氧化脲）或增白条（14％过氧化氢）。处理过的样品的顶面也要接受与基准样品相同的硬度测试。数据采用方差的2通分析和Tukey诚实显着差异检验（alpha = .05）进行分析。结果：每种修复材料的测试组之间的显微硬度没有显着差异。然而，在修复材料之间观察到显微硬度的显着差异。在所有测试组中，复合树脂的硬度值最高，而玻璃离聚物水泥的硬度值最低（P <0.05）。结论：本研究中使用的漂白剂对修复材料的显微硬度没有不利影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号