最终色泽与白度：各种超薄CAD/CAM贴面及牙色树脂基底的影响

Final shade and whiteness: impact of various ultra-thin CAD/CAM veneers and tooth-colored resin substrates.

作者信息

Wang Yinghui, Wei Xia, Gao Linjuan, Liu Dingkun, Chen Xing, Lin Liujun, Pan Yu, Yu Hao, Hong Guang, Cheng Hui

机构信息

Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.

Institute of Stomatology & Research Center of Dental Esthetics and Biomechanics, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.

出版信息

BMC Oral Health. 2025 Apr 8;25(1):504. doi: 10.1186/s12903-025-05901-x.

DOI:10.1186/s12903-025-05901-x

PMID:40200274

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11980069/

Abstract

BACKGROUND

Achieving optimal color control in chairside CAD/CAM ultra-thin veneers, remains a significant challenge for dental clinicians and technicians. This study aims to investigate the effect of ultra-thin CAD/CAM medium translucency (MT) lithium disilicate veneers and tooth-colored resin substrates on final tooth shade and whiteness.

MATERIALS AND METHODS

Disk-shaped ceramic veneers (IPS e.max CAD MT, Ivoclar Vivadent, Liechtenstein) with a thickness of 0.3 mm were fabricated in BL2, BL3, BL4, B1, A1, A2, and A3 shades. Additionally, 4-mm thick resin substrates (Tetric N-Ceram, Ivoclar Vivadent, Liechtenstein) were prepared in A2, A3, A3.5, and A4 shades to simulate tooth-colored substrates. Veneer-resin composites were prepared by combining veneer specimens and resin substrates. Color coordinates of tooth-colored resin substrates (R), veneer-resin composites (C) and the shade guide tabs (G) were obtained using a spectroradiometer. Color differences of ΔE ΔE and ΔE were then calculated with the CIEDE2000 formula. The initial and final shades were considered matched when ΔE or ΔE was clinically acceptable or minimal. Additionally, whiteness differences (ΔWI) between R and C specimens were recorded. Two-way analysis of variance (ANOVA) was performed, followed by the Tukey HSD. The significance level was set at p < 0.05.

RESULTS

Both the shades of resin substrates and veneer shades had significant effects on ΔE and ΔWI (p < 0.001), while no interaction effects were observed (p > 0.05). They increased with darker resin substrates and lighter veneers, except for no significant differences among BL4, B1, and A1 veneers. The largest color difference was observed for BL2 veneers on A4 substrates (ΔE = 6.9 ± 0.3, ΔWI = 19.0 ± 1.5), while the smallest occurred with A3 veneers on A2 substrates (ΔE = 2.4 ± 0.6, ΔWI = 5.6 ± 1.0). Final tooth shades were maximally transformed to lighter shades, with A2, A3, A3.5, and A4 substrates shifting to 2M1, 2L1.5, 2R2.5, and 3L1.5, respectively.

CONCLUSIONS

Both resin substrates and veneer shades significantly influence final tooth shade and whiteness independently. 0.3-mm thick CAD/CAM MT lithium disilicate veneers produce substantial shade and whiteness transformations, making them effective for shade enhancement.

摘要

背景

在椅旁CAD/CAM超薄贴面中实现最佳颜色控制，对牙科临床医生和技师来说仍然是一项重大挑战。本研究旨在调查超薄CAD/CAM中等透明度（MT）二硅酸锂贴面和牙齿颜色的树脂基底对最终牙齿色度和白度的影响。

材料与方法

制作了厚度为0.3mm的盘状陶瓷贴面（IPS e.max CAD MT，义获嘉伟瓦登特，列支敦士登），色度有BL2、BL3、BL4、B1、A1、A2和A3。此外，制备了厚度为4mm的树脂基底（Tetric N-Ceram，义获嘉伟瓦登特，列支敦士登），色度有A2、A3、A3.5和A4，以模拟牙齿颜色的基底。通过将贴面标本与树脂基底结合制备贴面-树脂复合材料。使用分光辐射计获得牙齿颜色树脂基底（R）、贴面-树脂复合材料（C）和比色板标签（G）的颜色坐标。然后用CIEDE2000公式计算ΔE、ΔE和ΔE的颜色差异。当ΔE或ΔE在临床上可接受或最小时，初始和最终色度被认为匹配。此外，记录了R和C标本之间的白度差异（ΔWI）。进行了双向方差分析（ANOVA），随后进行Tukey HSD检验。显著性水平设定为p < 0.05。

结果

树脂基底的色度和贴面的色度对ΔE和ΔWI均有显著影响（p < 0.001），而未观察到交互作用（p > 0.05）。除BL4、B1和A1贴面之间无显著差异外，它们随着树脂基底颜色加深和贴面颜色变浅而增加。在A4基底上的BL2贴面观察到最大颜色差异（ΔE = 6.9 ± 0.3，ΔWI = 19.0 ± 1.5），而在A2基底上的A3贴面颜色差异最小（ΔE = 2.4 ± 0.6，ΔWI = 5.6 ± 1.0）。最终牙齿色度最大程度地转变为较浅的色度，A2、A3、A3.5和A4基底分别转变为2M1、2L1.5、2R2.5和3L1.5。