Ozdemir Seyit Bilal, Ozdemir Busra
Faculty of Dentistry Department of Restorative Dentistry, Giresun University, Mumcular St & No:1, Giresun, 28100, Turkey.
Clin Oral Investig. 2025 Jun 26;29(7):360. doi: 10.1007/s00784-025-06439-6.
This in vitro study aimed to assess the color matching of two single-shade and one group-shade universal composite resins for Class III and Class V restorations in extracted human teeth of different shades and evaluate the impact of thermal aging on these restorations using both instrumental and visual methods.
Forty-five extracted human central incisors in a range of Vita Classical shades (A1, A2 and A3) were used. Three composite resins (Zenchroma (ZC), Charisma Diamond One (CDO), and Neo Spectra ST (NEO)) were tested. Each tooth received both Class III and Class V restorations (2 mm depth and 4 mm diameter) with the same composite resin. Color measurements were made immediately after restoration, 24 h, and after thermal aging using an intraoral spectrophotometer. Color differences (ΔE) were calculated using the CIEDE2000 formula. Visual assessments were scored from 0 (perfect fit) to 4 (significant mismatch) by three dental specialist. Data were analyzed using IBM SPSS V23. A Generalized Linear Model (GLM) was used to assess main and interaction effects, and Tukey's test was applied for multiple comparisons. A significance level of p < 0.05 was considered.
NEO showed statistically significantly lower ΔE₀₀ values (2.45 ± 1.29) compared to the other composite resins (p < 0.001). Class III restorations (3.41 ± 1.48) exhibited lower ΔE₀₀ values than Class V restorations (4.56 ± 2.23, p < 0.001). ΔE₀₀ values decreased after aging (p = 0.007).
Class III restorations demonstrated better color matching than Class V restorations in both visual and instrumental evaluations. The group-shade composite resin showed better color matching compared to the single-shade composite resins. Although visual matching improved over time, some instrumentally measured color differences remained above the clinically acceptable threshold (ΔE₀₀>1.8).
Clinicians should consider both composite type and cavity configuration when selecting materials for aesthetic restorations.
本体外研究旨在评估两种单色调和一种组色调通用复合树脂用于不同色度的拔除人牙Ⅲ类和Ⅴ类修复体时的颜色匹配情况，并使用仪器和视觉方法评估热老化对这些修复体的影响。
使用45颗Vita经典色度范围（A1、A2和A3）的拔除人正中切牙。测试了三种复合树脂（Zenchroma（ZC）、Charisma Diamond One（CDO）和Neo Spectra ST（NEO））。每颗牙齿均使用相同的复合树脂进行Ⅲ类和Ⅴ类修复（深度2mm，直径4mm）。修复后立即、24小时以及热老化后使用口腔分光光度计进行颜色测量。使用CIEDE2000公式计算颜色差异（ΔE）。由三名牙科专家从0（完美匹配）到4（明显不匹配）进行视觉评估评分。使用IBM SPSS V23分析数据。使用广义线性模型（GLM）评估主要和交互作用，并应用Tukey检验进行多重比较。显著性水平设定为p＜0.05。
与其他复合树脂相比，NEO显示出统计学上显著更低的ΔE₀₀值（2.45±1.29）（p＜0.001）。Ⅲ类修复体（3.41±1.48）的ΔE₀₀值低于Ⅴ类修复体（4.56±2.23，p＜0.001）。老化后ΔE₀₀值降低（p = 0.007）。
在视觉和仪器评估中，Ⅲ类修复体均显示出比Ⅴ类修复体更好的颜色匹配。组色调复合树脂比单色调复合树脂显示出更好的颜色匹配。尽管视觉匹配随时间有所改善，但一些仪器测量的颜色差异仍高于临床可接受阈值（ΔE₀₀＞1.8）。
临床医生在为美学修复选择材料时应考虑复合树脂类型和窝洞形态。
