Color management of porcelain veneers: influence of dentin and resin cement colors.
Color management of porcelain veneers: influence of dentin and resin cement colors.
复制标题
瓷贴面的颜色管理：牙本质和树脂水泥颜色的影响。
DOI：
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发表时间：
2010
影响因子：
1.9
通讯作者：
Moustafa N. Aboushelib
中科院分区：
文献类型：
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作者：
A. Dozić;Maria Tsagkari;G. Khashayar;Moustafa N. Aboushelib
目的
瓷贴面已成为一个有趣的治疗选择，以纠正前牙的形状和颜色。由于其有限的厚度和高透明度，实现良好的颜色匹配受到几个变量的影响。本研究旨在探讨天然牙本质颜色和树脂水门汀颜色对瓷贴面最终颜色匹配的影响。
方法和材料
选择一个预先选定的色调标签（A1）作为上颌中切牙的目标颜色，并使用数字分光光度计（SpectroShade，MHT）测量其颜色参数（L*a*B*）。使用代表各种牙齿颜色的九种天然牙本质颜色（Natural Die Material，Ivoclar Vivadent）制备上颌中切牙的树脂复制品，并采用标准的瓷贴面制备方法。将制备的瓷贴面（IPS Empress Esthetic，A1，0.6 mm厚，Ivoclar Vivadent）使用七种色调的树脂粘固剂（Variolink贴面，Ivoclar Vivadent）粘固在树脂模具（九组天然牙本质颜色）上。测量胶合单板的L*a*B* 值，并根据预先选择的目标颜色（A1）计算DE值。DE大于3.3被认为是人眼可检测到的显著颜色失配。
结果
七种色调的树脂粘固剂对单板的最终颜色没有显著影响，因为每个测试组测得的DE值几乎相同。另一方面，天然牙本质的颜色是影响最终颜色匹配的重要因素。63种测试组合（9种天然牙本质颜色和7种树脂粘固剂颜色）均未产生可接受的颜色匹配。
结论
即使使用不同色调的树脂粘固剂，薄瓷贴面也不能掩盖下面的牙齿颜色。加入不透明瓷（高色度）可改善最终颜色匹配。
OBJECTIVE
Porcelain veneers have become an interesting treatment option to correct the shape and color of anterior teeth. Because of their limited thickness and high translucency, achieving a good color match is influenced by several variables. The aim of this work was to investigate the influence of natural dentin and resin cement colors on final color match of porcelain veneers.
METHOD AND MATERIALS
A preselected shade tab (A1) was chosen as the target color for a maxillary central incisor, and its color parameters (L*a*b*) were measured using a digital spectrophotometer (SpectroShade, MHT). Nine natural dentin colors (Natural Die Material, Ivoclar Vivadent) representing a wide range of tooth colors were used to prepare resin replicas of the maxillary central incisor with a standard preparation for porcelain veneers. The prepared porcelain veneers (IPS Empress Esthetic, A1, 0.6 mm thick, Ivoclar Vivadent) were cemented on the resin dies (nine groups of natural dentin colors) using seven shades of resin cement (Variolink Veneers, Ivoclar Vivadent). The L*a*b* values of the cemented veneers were measured, and DE values were calculated against the preselected target color (A1). DE greater than 3.3 was considered as a significant color mismatch detectable by the human eye.
RESULTS
The seven shades of resin cement had no significant influence on the final color of the veneers, as the measured DE values were almost identical for every test group. On the other hand, the color of natural dentin was a significant factor that influenced final color match. None of the 63 tested combinations (nine natural dentin colors and seven resin cement colors) produced an acceptable color match.
CONCLUSION
Thin porcelain veneers cannot mask underlying tooth color even when different shades of resin cement are used. Incorporation of opaque porcelain (high chroma) may improve final color match.