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Scanning Electron Microscopy01:07

Scanning Electron Microscopy

A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
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Updated: Jul 5, 2026

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
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椅子侧CAD/CAM陶内嵌的边缘适应:一个体外SEM研究

Alexandros Tzigeris1, Paulína Gálfiová2, Daniel Kosnáč2

  • 1Department of Stomatology and Maxillofacial Surgery, Faculty of Medicine, Comenius University in Bratislava, Heydukova 10, 812 50 Bratislava, Slovakia.

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|February 26, 2026
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概括
此摘要是机器生成的。

这项研究比较了三种计算机辅助设计和计算机辅助制造 (CAD/CAM) 嵌入材料的边际合适性. 在这种体外分析中,Celtra Duo显示了最小的垂直边际差距 (VMG),表明了优越的边际适应.

关键词:
在CAD/CAM中使用.陶嵌入式陶嵌入式椅子旁牙科 椅子旁牙科脱酸是一种离酸盐.边际适合性 边际适合性聚合物透的陶网由聚合物透的陶网组成.扫描电子显微镜扫描电子显微镜酸增强的酸增强了.

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科学领域:

  • 牙科材料科学 牙科材料科学
  • 生物材料工程 生物材料工程
  • 数字牙科数字牙科

背景情况:

  • 边缘适合对于牙科修复的寿命和临床成功至关重要.
  • 计算机辅助制造 (CAD/CAM) 为制造牙假体提供了先进的解决方案.
  • 评估不同CAD/CAM材料的边际完整性对于临床决策至关重要.

研究的目的:

  • 为了比较三个椅子侧CAD/CAM内嵌材料的垂直边缘间隙 (VMG):VITA Enamic,CEREC Tessera和Celtra Duo.
  • 用标准化的数字工作流和扫描电子显微镜 (SEM) 来评估边缘适应.
  • 确定材料类型是否显著影响CAD/CAM修复中的边际差距.

主要方法:

  • 标准化I类内嵌制剂是在人上制成的.
  • 修复使用完整的椅子边CAD/CAM工作流程制造,包括口内扫描,设计和削.
  • 垂直边缘间隙 (VMG) 用每颗牙在多个位点的SEM分析量化.

主要成果:

  • 塞尔特拉Duo显示了最低的平均VMG (8.09±1.98微米).
  • 在VITA Enamic (27.90±29.76μm) 和CEREC Tessera (32.72±21.80μm) 中,VMG的平均值较高,分布更广.
  • 观察到材料对VMG的统计学上显著的整体效应 (p=0.040),尽管对对比是不确定的.

结论:

  • 在评估的椅子侧CAD/CAM材料中检测到对边缘适合的总体物质影响.
  • 与VITA Enamic和CEREC Tessera相比,Celtra Duo表现出了较优的边际适应趋势.与VITA Enamic和CEREC Tessera相比,Celtra Duo表现出了较优边际适应趋势.
  • 所有测试材料均显示平均VMG在可接受的临床范围内,尽管适合度有所不同.