层状 Veneer 修复的颜色变化,应用于白化牙
International journal of computerized dentistry
|March 22, 2024
概括
牙漂白显著影响CAD/CAM层 Veneer 修复的颜色稳定性. 在未漂白的牙上的低透光材料在五年内表现出最好的色彩稳定性.
科学领域:
- 牙科材料科学 牙科材料科学
- 恢复性牙科 恢复性牙科
- 生物材料是一种生物材料.
背景情况:
- 牙漂白是一种常见的美容手术.
- 层状 Veneer 修复经常用于牙科美学.
- 评估白化牙修复的长期色彩稳定性具有临床意义.
研究的目的:
- 为了评估CAD/CAM层 Veneer 修复的长期色彩稳定性,将其放置在白化牙和未白化牙上.
- 为了比较老化后不同半透明CAD/CAM材料 (GC LiSi初始和IPS Emax CAD) 的色彩稳定性.
主要方法:
- 使用80个提取的人体中央切口,分为漂白和未漂白的组.
- 层面板修复用两种类型的CAD/CAM材料 (GC LiSi Initial和IPS Emax CAD) 制造,具有高透光度 (HT) 和低透光度 (LT) 的变体.
- 修复部分用粘合剂固,并经过2年和5年的热老化. 颜色变化 (ΔE00) 通过光谱测量进行测量.
主要成果:
- 所有漂白的组都比未漂白的组呈现出更大的颜色变化.
- 经过2年和5年后,未漂白的牙上的LT材料显示出最少的颜色变化 (ΔE00 ≈ 0.81-0.84).
- 漂白牙上的HT材料显示出最多的颜色变化 (ΔE00 ≈ 0.92-0.96).
结论:
- 牙漂白会对层 Veneer 修复的色彩稳定性产生负面影响.
- CAD/CAM材料的半透明度在色彩稳定性中起作用,而LT材料更稳定.
- 老化加剧了所有测试的层 Veneer 材料的颜色变化.
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