• 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 >Loss of tooth structure associated with preparation for two monolithic CAD-CAM complete coverage restorations
【24h】

Loss of tooth structure associated with preparation for two monolithic CAD-CAM complete coverage restorations

机译：与两种单片CAD-CAM完整覆盖修复的准备相关的牙齿结构的损失

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 problemDifferent techniques are used to fabricate complete coverage restorations. Each fabrication technique requires a specific preparation design that may violate a principle of tooth preparation, that is, conservation of tooth structure. PurposeThe purpose of this in?vitro study was to compare the volume of loss of mandibular first molar structure associated with a preparation for computer-aided design and computer-aided manufacturing (CAD-CAM) versus conventionally fabricated complete coverage restorations. Materials and methodsFifty artificial mandibular right first molars were weighed before and after preparation for complete coverage restorations of the following types: complete cast, monolithic zirconia, monolithic pressed lithium disilicate, monolithic milled lithium disilicate, and metal-ceramic crowns (n=10 per method). Tooth mass loss was measured by subtracting the mass after preparation from the mass before the preparation, and tooth volume loss was calculated by dividing the mass by the density of the material. A robust analysis of variance (ANOVA), followed by a post hoc test, was used to compare the volume of tooth loss (α=.01). ResultsMean tooth volume losses were 255.6 mm3, 270.0 mm3, 312.7 mm3, 331.7 mm3, and 309.9 mm3for complete cast, monolithic zirconia, monolithic pressed lithium disilicate, monolithic milled lithium disilicate, and metal-ceramic crowns, respectively. Teeth prepared for monolithic CAD-CAM zirconia and lithium disilicate crowns did not exhibit a significantly lower (P>.01) decrease in volume loss than with complete cast and monolithic pressed lithium crowns. ConclusionsPreparation of teeth for monolithic CAD-CAM complete coverage restorations is not associated with a significantly higher volume of tooth loss than their conventionally fabricated counterpart preparations.
机译：问题陈述不同的技术被用来制作全覆盖修复体。每种制作技术都需要一种特定的制备设计，这可能违反牙齿制备的原则，即牙齿结构的保护。目的这件事的目的是什么？体外研究旨在比较与计算机辅助设计和计算机辅助制造（CAD-CAM）准备相关的下颌第一磨牙结构缺失量与常规制作的全覆盖修复体。材料和方法：在准备以下类型的全覆盖修复体之前和之后，对50颗人工下颌右第一磨牙进行称重：全铸造、整体氧化锆、整体压制二硅酸锂、整体研磨二硅酸锂和金属烤瓷冠（每种方法n=10）。牙齿质量损失的测量方法是从制备前的质量中减去制备后的质量，牙齿体积损失的计算方法是将质量除以材料的密度。采用稳健方差分析（ANOVA）和事后检验来比较牙齿缺失量（α=0.01）。结果全铸、整体氧化锆、整体压制二硅酸锂、整体研磨二硅酸锂和金属烤瓷冠的平均牙齿体积损失分别为255.6 mm3、270.0 mm3、312.7 mm3、331.7 mm3和309.9 mm3。使用整体CAD-CAM氧化锆和二硅酸锂全冠制作的牙齿，其体积损失的降低幅度并不显著低于使用完全铸造和整体压制锂全冠制作的牙齿（P>0.01）。结论整体CAD-CAM全覆盖修复体的牙齿预备与传统制作的相应预备相比，与显著更高的牙齿缺失量无关。

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