...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The European journal of prosthodontics and restorative dentistry >Influence of Gingival Contour on Marginal Fit of CAD-CAM Zirconia Copings on Implant Stock Abutments
【24h】

Influence of Gingival Contour on Marginal Fit of CAD-CAM Zirconia Copings on Implant Stock Abutments

机译：牙龈轮廓对CAD-CAM氧化锆应对植入物植入物的边缘拟合的影响

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

Intraoral scanning subgingival finish lines has been described as challenging. The purpose of this study was to assess the impact of gingival contour around margins of implant stock abutments on marginal fit of Computer-aided Design - Computer-aided Manufacturing (CAD- CAM) zirconia copings. This in-vitro study was conducted on 40 analogues of implant stock abutments that were embedded into individual phantoms composed by a resin block. All 40 phantoms underwent two intraoral scans - one with (test group) and one without artificial gingiva (control group) -using aclosed system intraoral scanner. Zirconia copings were then digitally designed and milled, followed by high-speed sintering, before being analyzed for marginal adaptation and internal surface roughness with scanning electron microscopy. Statistically significant differences between groups were assessed with the Mann Whitney test. Median marginal gap values were 149.78 mu m (95% CI: 112.39- 216.66) for the test group and 94.90 mu m (95% CI: 83.89- 107.74) for the control group. A statistically significant difference was found between groups (p= 0.0001). However, there were no subjective differences between groups for internal surface roughness. Within the limitations of this study, the present findings suggest that a gingival contour one millimeter higher than the finishing line affects marginal adaptation of CAD- CAM zirconia copings.
机译：口腔内扫描龈下终点线被描述为具有挑战性。本研究的目的是评估种植体基牙边缘周围的牙龈轮廓对计算机辅助设计-计算机辅助制造（CAD-CAM）氧化锆覆盖物边缘拟合的影响。这项体外研究是在40个植入基牙的类似物上进行的，这些基牙被植入由树脂块组成的单个模型中。所有40个模型均使用aclosed系统口腔内扫描仪进行了两次口腔内扫描，一次为试验组，另一次为对照组，无人工牙龈。然后对氧化锆覆盖层进行数字设计和研磨，然后进行高速烧结，然后用扫描电子显微镜分析边缘适应性和内部表面粗糙度。使用Mann-Whitney检验评估各组之间的统计显著性差异。试验组和对照组的边缘间隙中值分别为149.78μm（95%可信区间：112.39-216.66）和94.90μm（95%可信区间：83.89-107.74）。两组之间的差异具有统计学意义（p=0.0001）。然而，在内部表面粗糙度方面，各组之间没有主观差异。在这项研究的局限性内，目前的研究结果表明，牙龈轮廓比终点线高一毫米会影响CAD-CAM氧化锆覆盖物的边缘适应性。

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