• 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 >Marginal accuracy and fracture strength of ceromer/fiber-reinforced composite crowns: effect of variations in preparation design.
【24h】

Marginal accuracy and fracture strength of ceromer/fiber-reinforced composite crowns: effect of variations in preparation design.

机译：陶瓷/纤维增强复合材料牙冠的边缘精确度和断裂强度：制备设计变化的影响。

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 THE PROBLEM: Targis/Vectris restorations provide excellent esthetics and clinical success; however, the relationship of their marginal accuracy and fracture strength to the tooth preparation design requires further investigation. PURPOSE: The aim of this study was to evaluate the effect of variations in tooth preparation design on the marginal accuracy before and after cementation and on the fracture strength of the ceromer/fiber reinforced composite crown. MATERIAL AND METHODS: Three metal dies with varying total occlusal convergence angles (6 degrees, 10 degrees, 15 degrees) were prepared. A total of 30 (10 for each angle) Targis/Vectris crowns were fabricated. The restorations were evaluated at 48 points on the entire circumferential margin with a stereomicroscope measuring in micrometers for margin adaptation before and after cementation. The specimens then were compressively loaded to failure in a universal testing machine. Marginal adaptation was analyzed with Kruskal-Wallis test andpost-hoc Dunnett test (alpha=0.05). The fracture strength was analyzed with analysis of variance and the Scheffe adjustment at the 95% significance level. Fracture surfaces of the crowns were examined with a scanning electron microscope to determine the mode of fracture. RESULTS: The smallest marginal gap was recorded in angled crowns with a 6-degree convergence (47 microm mean). The marginal gap of most (95.6%) of the crowns was within a clinically acceptable level (established as
机译：问题陈述：Targis / Vectris修复体具有出色的美学和临床成功性;但是，其边缘精度和断裂强度与牙齿准备设计之间的关系需要进一步研究。目的：本研究的目的是评估牙准备设计中的变化对粘接前后的边缘准确性以及对陶瓷/纤维增强复合材料牙冠的断裂强度的影响。材料与方法：制备了三个具有不同总咬合角（6度，10度，15度）的金属模具。总共制作了30个（每个角度10个）Targis / Vectris牙冠。在固井之前和之后，使用千分尺测量的立体显微镜对整个圆周边缘的48个点进行修复体评估。然后在通用测试机中将样品压缩加载至破坏。用Kruskal-Wallis检验和事后Dunnett检验分析了边缘适应性（alpha = 0.05）。通过方差分析和在95％显着性水平下的Scheffe调整分析断裂强度。用扫描电子显微镜检查冠的断裂表面，以确定断裂方式。结果：最小的边缘间隙记录在成角度的牙冠中，具有6度会聚度（平均47微米）。大多数冠的边缘间隙（95.6％）在临床可接受的水平内（确定为

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