• 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 >Hardness comparison of bulk-filled/transtooth and incremental-filled/occlusally irradiated composite resins.
【24h】

Hardness comparison of bulk-filled/transtooth and incremental-filled/occlusally irradiated composite resins.

机译：大块填充/透齿和增量填充/咬合辐照复合树脂的硬度比较。

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: Use of a bulk-fill/transtooth composite resin insertion/irradiation technique may not provide as well polymerized a restoration as when using a conventional incremental placement/irradiation technique. Little information exists as to how the hardness of restorations produced by the 2 techniques compare. PURPOSE: The purpose of this study was to determine the effect of composite resin placement and an irradiation technique on the axial hardness at various depths in a Class I composite resin to include the influence of composite resin filler classification and shade. MATERIAL AND METHODS: Cylindrical Class I preparations were made in 70 recently extracted human molars and restored with either a light (A1) or dark shade (A4) of a microfill, microhybrid, or nanohybrid composite resin, or with a single shade of a translucent material. Half were placed using a conventional 2-mm-thick incremental-fill/occlusal irradiation technique, and half using a bulk-fill/transtooth irradiation method (n=5). Specimens were sectioned occluso-apically and axial Knoop hardness values were obtained at depths of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mm. Hardness at 0.5 mm was used as a control to compare to deeper readings. Statistical analyses consisted of multiple ANOVAs and Dunnett's post-hoc tests performed at appropriately determined significance levels. RESULTS: For 3 multishaded materials tested, axial hardness values were relatively unaffected by composite resin shade or filler classification for the incremental technique, but were significantly affected by these factors when using the bulk-fill/transtooth irradiation method. A single shade translucent material was not affected in either the bulk or incremental condition. CONCLUSIONS: Use of a bulk-fill/transtooth irradiation technique for composite resin placement does not result in axial hardness values equivalent to that of an incremental-fill/occlusal irradiation technique.
机译：问题陈述：使用填充/穿齿复合树脂插入/辐照技术可能无法提供与使用常规增量放置/辐照技术一样好的聚合修复体。关于如何比较这两种技术产生的修复体的硬度的信息很少。目的：本研究的目的是确定复合树脂的放置和辐照技术对I类复合树脂在不同深度的轴向硬度的影响，以包括复合树脂填料分类和阴影的影响。材料与方法：用最近提取的70颗人类磨牙制备圆柱形I类制剂，并用微填充，微杂化或纳米杂化复合树脂的浅色（A1）或深色阴影（A4）或半透明的单一阴影进行修复材料。一半使用常规的2毫米厚增量填充/咬合照射技术放置，另一半使用批量填充/透齿照射方法放置（n = 5）。将样品咬合切开，并且在0.5、1.0、1.5、2.0、2.5和3.0mm的深度处获得轴向努氏硬度值。以0.5毫米的硬度作为对照，与更深的读数进行比较。统计分析包括在适当确定的显着性水平下进行的多项方差分析和Dunnett事后检验。结果：对于3种多阴影材料进行了测试，轴向硬度值相对不受增量技术的复合树脂阴影或填料分类的影响，但在使用大体积填充/穿齿照射方法时，这些硬度值显着影响。在整体或增量条件下，单一阴影半透明材料均不受影响。结论：使用块状填充/透齿照射技术进行复合树脂放置不会产生与增量填充/咬合照射技术相同的轴向硬度值。

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