有多少种牙颜色?有多少种牙颜色?
Sascha Hein1, Ján Morovič2, Peter Morovič3
1School of Design, University of Leeds, Leeds, UK.
概括
现有的牙颜色指南不能充分代表天然牙颜色的全部光谱. 这项研究发现了1173种独特的牙颜色,这表明需要92种阴影来实现理想的覆盖范围,突出了当前指南的局限性.
科学领域:
- 牙科材料科学 牙科材料科学
- 牙科中的色彩科学
- 审美牙科 审美牙科
背景情况:
- 准确的阴影匹配对于成功的牙科修复至关重要.
- 目前的阴影指南,如Vita Classical和Vita 3D-Master,被广泛使用,但它们对天然牙颜色范围的覆盖范围并不清楚.
- 了解现有指南的局限性对于改善修复结果至关重要.
研究的目的:
- 通过体内测量来估计不同的天然牙颜色的数量.
- 为了评估常见的牙阴影指南的覆盖误差 (CE) 和覆盖误差百分比 (CEP).
- 为了确定全面自然牙颜色表示所需的最佳色调数量.
主要方法:
- 使用了通过校准牙科摄影对8153颗未经处理的牙的体内CIELAB测量.
- 应用卡丁度分析来识别独特的天然牙颜色.
- 使用欧几里德距离 (ΔEab) 来计算CE和CEP,与Vita Classical和Vita 3D-Master指南的临床感知度 (PT) 和可接受度 (AT) 值相比.
主要成果:
- 确定了1173种独特的天然牙颜色.
- 维塔经典指南显示CE为4.1 ΔEab,其中75%的颜色超出AT;维塔3D-Master的CE为3.3 ΔEab,其中70%超出AT.
- 一个理想的阴影指南需要92个离散的阴影来完全覆盖范围,CE为1.2 ΔEab和0.3%的CEP超出AT.
结论:
- 目前的阴影指南 (Vita Classical,3D-Master) 没有充分覆盖天然牙颜色范围.
- 据估计,为了获得最佳覆盖,需要92个阴影,这个数字对于当前的物理指南来说是不切实际的.
- 未来数字牙科和3D打印技术的进步可能为更全面的阴影表示提供解决方案.
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