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相关概念视频

Fatigue01:21

Fatigue

180
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
180

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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
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疲劳方法用于评估半透明的牙氧化.

Viviane Cantelli1, Marcelo Tapparo Meirelles2, Alvaro Della Bona1

  • 1Post-graduate Program in Dentistry, School of Dentistry, University of Passo Fundo, Passo Fundo, RS, Brazil.

Journal of dentistry
|July 15, 2024
PubMed
概括

本次审查强调,阶段应力疲劳方法是最常见的评估半透明石. 然而,很少有研究成功地复制了体外临床失败,这表明需要改进测试方法.

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
  • 机械测试 机械测试 机械测试

背景情况:

  • 半透明石越来越多地用于牙科修复.
  • 了解疲劳行为和故障模式对于临床寿命至关重要.
  • 当前的体外试验方法可能无法完全复制临床失败场景.

研究的目的:

  • 系统地审查用于半透明的疲劳测试方法.
  • 为了将体外观察到的故障与临床报告的故障模式相关联.

主要方法:

  • 在MEDLINE/PubMed和Scopus进行了全面的文献搜索.
  • 包括使用牙半透明基的疲劳测试的研究.
  • 选择了41项研究进行定性综合.

主要成果:

  • 步骤应力疲劳方法是最常用的 (18项研究).
  • 测试主要在潮湿的环境中使用在水泥结构上的不钢活塞进行.
  • 骨折分析通常表明在凝固或接触表面的故障启动,或在解剖皇冠的宫边缘.

结论:

  • 阶段应力方法在体外对半透明的疲劳评估中很普遍.
关键词:
牙科材料 牙科材料牙科 牙科是指牙科的专业.疲劳 疲劳 疲劳 疲劳 疲劳半透明的合金.

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  • 存在很大的差距,因为只有少数研究报告的失败反映了临床应用中的失败.
  • 在体外疲劳测试的进一步改进是必要的,以准确预测半透明的恢复的临床性能和失败模式.