...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of prosthodontics: official journal of the American College of Prosthodontists >An in vitro evaluation of fit of zirconium-oxide-based ceramic four-unit fixed partial dentures, generated with three different CAD/CAM systems, before and after porcelain firing cycles and after glaze cycles.
【24h】

An in vitro evaluation of fit of zirconium-oxide-based ceramic four-unit fixed partial dentures, generated with three different CAD/CAM systems, before and after porcelain firing cycles and after glaze cycles.

机译：在陶瓷烧成循环之前和之后以及上釉循环之后，使用三种不同的CAD / CAM系统生成的基于氧化锆的陶瓷四单元固定局部义齿的贴合度的体外评估。

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

PURPOSE: The purpose of this study was to assess in vitro the marginal fit of four-unit fixed partial dentures (FPDs) produced using three different computer aided design/computer aided manufacturing (CAD/CAM) all-ceramic systems before and after porcelain firing cycles and after glaze cycles. MATERIALS AND METHODS: An acrylic resin model of a maxillary arch was fabricated. Teeth #6 and 9 were prepared; teeth #7 and 8 were absent. Forty-five four-unit zirconium-oxide-based ceramic FPDs were made following conventional impression and master cast techniques: 15 were made with the Everest system, 15 with the Procera system, and 15 with the Lava system. Marginal gaps along vertical planes were measured for each bridge before (Time 0) and after (Time 1) porcelain firing cycles and after glaze cycles (Time 2) using a total of 8 landmarks (4 for tooth #6 and 4 for tooth #9) by means of a microscope at a magnification of x50. MANOVA was performed to determine whether the 8 landmarks, jointly considered, differed between CAD/CAM systems and time phases. Two-way ANOVA was performed to investigate in detail, for each landmark, how gap measurements were related to CAD/CAM systems and time phases. Differences were considered to be significant at p < 0.05. RESULTS: The mean values of the Everest system (microm) were: 63.37 (Time 0), 65.34 (Time 1), and 65.49 (Time 2); the mean values of the Lava system (microm) were: 46.30 (Time 0), 46.79 (Time 1), and 47.28 (Time 2); the mean values of the Procera system (microm) were: 61.08 (Time 0), 62.46 (Time 1), and 63.46 (Time 2). MANOVA revealed quantitative differences of the 8 landmarks, jointly considered, between the three CAD/CAM systems (p < 0.0001), but it did not reveal any quantitative differences among the three time phases (p > 0.4). Two-way ANOVA revealed that the Lava system produced gap measurements statistically smaller than the Everest and Procera systems (p < 0.0001 for each landmark). CONCLUSIONS: Within the limitations of this study, it was concluded that the three zirconium-oxide-based ceramic CAD/CAM systems demonstrated a comparable and acceptable marginal fit; however, the Lava system produced gap measurements statistically smaller than the Everest and Procera systems. The porcelain firing cycles and the glaze cycles did not affect the marginal fit of the zirconium-oxide-based ceramic CAD/CAM systems.
机译：目的：本研究的目的是评估在烧瓷前后使用三种不同的计算机辅助设计/计算机辅助制造（CAD / CAM）全陶瓷系统生产的四单元固定局部义齿（FPD）的边缘适应性循环和上釉循环之后。材料与方法：制作上颌牙弓的丙烯酸树脂模型。准备了6号和9号牙齿;第7和8号牙齿缺失。遵循常规压印和主铸造技术制成了四十五个四单元氧化锆基陶瓷FPD：Everest系统制造了15个，Procera系统制造了15个，Lava系统制造了15个。使用总计8个界标（6号牙齿为4个，6号牙齿为4个）对每个桥梁在（时间0）之前和之后（时间1）瓷烧制循环以及在釉料循环后（时间2）沿垂直平面的边际间隙进行了测量。 ）的显微镜放大倍数为x50。进行了MANOVA，以确定共同考虑的8个界标在CAD / CAM系统和时间阶段之间是否不同。进行了双向方差分析，以详细调查每个界标的间隙测量与CAD / CAM系统和时间阶段之间的关系。在p <0.05时差异被认为是显着的。结果：Everest系统的平均值（微米）为：63.37（时间0），65.34（时间1）和65.49（时间2）;熔岩系统的平均值（微米）为：46.30（时间0），46.79（时间1）和47.28（时间2）; Procera系统的平均值（微米）为：61.08（时间0），62.46（时间1）和63.46（时间2）。 MANOVA揭示了三个CAD / CAM系统之间共同考虑的8个界标的数量差异（p <0.0001），但它没有揭示三个时相之间的任何数量差异（p> 0.4）。双向方差分析显示，熔岩系统产生的间隙测量值在统计上小于Everest和Procera系统（每个界标p <0.0001）。结论：在本研究的范围内，得出的结论是，三个基于氧化锆的陶瓷CAD / CAM系统显示出可比较且可接受的边际拟合度。但是，熔岩系统产生的间隙测量值在统计上小于Everest和Procera系统。烤瓷周期和上釉周期不影响基于氧化锆的陶瓷CAD / CAM系统的边缘配合。

著录项

相似文献

  • 外文文献
  • 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