准静态机械测试用于计算机辅助的设计和制造合面膜固到磨砂丁模拟材料
Artit Songwatcharaporn1, Sharanbir K Sidhu2, K Elizabeth Tanner3
1Center for Oral Bioengineering, Institute of Dentistry, Queen Mary University of London; a.songwatcharaporn@qmul.ac.uk.
Journal of visualized experiments : JoVE
|January 6, 2025
概括
在实验室测试中,树脂纳米陶 (RNC) 封闭面板与二酸盐 (LD) 面板相比,显示出更高的断裂强度. 这一发现对于临床医生选择耐用CAD/CAM材料进行微创牙科修复至关重要.
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
- 恢复性牙科 恢复性牙科
背景情况:
- 最少侵入性牙科使用薄陶修复来保存牙结构.
- 新的计算机辅助设计和计算机辅助制造 (CAD/CAM) 材料需要机械强度评估.
- 了解材料特性对于确保牙科修复的长寿至关重要.
研究的目的:
- 为了确定1毫米厚的CAD/CAM封闭面板的断裂强度,该面板由脱酸盐 (LD) 和树脂纳米陶 (RNC) 材料制成.
- 开发和验证一项实验室协议,用于对牙面板进行负载-破裂测试.
- 为了比较RNC和LD材料在模拟的闭塞负荷下的机械性能.
主要方法:
- 开发了一个负载到断裂的测试协议,使用模具模拟水合牙.
- 使用CAD/CAM技术从LD和RNC块制造出1毫米厚的闭合面板.
- 混凝土面板,将它们 subjected to controlled aging,并使用具有标准化装载球的通用测试机器测试断裂强度.
主要成果:
- 树脂纳米陶 (RNC) 修复表现出明显更高的平均最大承载能力 (3,212.80 N) 比二氧化 (LD) 修复 (2,727.10 N) (p < 0.05).
- 对于任何一组材料,在测试期间都没有发生解.
- 断裂分析显示,荷载地点的赫兹圆裂以及LD和RNC组的边缘附近的辐射裂.
结论:
- 树脂纳米陶 (RNC) 材料在1毫米厚的CAD/CAM闭塞面膜上,与脱酸盐 (LD) 相比,具有优越的断裂阻力.
- 开发的实验室协议提供了一种可靠的方法来评估薄型牙科修复的骨折强度.
- 两种CAD/CAM材料都表现出类似的缺陷分布模式,这表明材料处理或固有的特性会影响故障模式.
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