Paravina Rade D, Kimura Mikio, Powers John M
Department of Restorative Dentistry and Biomaterials, Houston Biomaterials Research Center, The University of Texas Health Science Center at Houston, Texas 77030-3402, USA.
Quintessence Int. 2006 Oct;37(9):713-9.
The aim of this study was to evaluate color compatibility of corresponding resin composite shades keyed to Vitapan Classical shade guide (Vita).
Twenty-one shades of 6 commercial resin composites were analyzed. Specimens (n = 5) were made as disks, 11 mm in diameter and 2 mm thick, using cylindrical molds. Specimens were polymerized according to manufacturers' suggestions using a light-curing unit. Data were collected using a spectrophotometer and analyzed using the appropriate color difference metric equations. A total color difference (deltaE*ab) greater than or equal to 3.7 was considered a mismatch. Analysis of variance and Fisher's probable least-squares difference (PLSD) test. intervals for comparison of means were calculated at the .05 level of significance.
Mean deltaEab values among A2, B2, C2, and opaque A2 shade pairs were 4.4 (1.8), 7.3 (3.2), 5.6 (2.8), and 6.5 (1.8), respectively, while the mean color difference for all the pairs compared was 5.8 (2.8). For A2 shades, deltaL, deltaaab, and deltabab values ranged by 5.3, 2.3, and 6.7, respectively. Corresponding values for B2 shades ranged by 10.5, 2.2, and 11.5; 7.9, 2.2, and 4.3 for C2 shades; and 7.9, 1.4, and 4.4 for opaque A2 shades. Fisher's PLSD critical intervals for comparing deltaE*ab values among the shades and composite pairs were 0.07 and 0.15, respectively (P < .0001, power 1.00).
Overall, poor color compatibility of shade pairs of identical shade designation was recorded. The best color match was recorded for A2 shade pairs, followed by C2, B2, and opaque A2 shade pairs.
本研究旨在评估与维他经典比色板（Vita）对应的树脂复合材料色号的颜色匹配度。
分析了6种市售树脂复合材料的21种色号。使用圆柱形模具制作直径为11毫米、厚度为2毫米的圆盘状试样（n = 5）。根据制造商的建议，使用光固化设备对试样进行聚合。使用分光光度计收集数据，并使用适当的色差度量方程进行分析。总色差（ΔE*ab）大于或等于3.7被认为不匹配。采用方差分析和Fisher最小显著差数法（PLSD）检验。在0.05的显著性水平下计算均值比较的区间。
A2、B2、C2和不透明A2色号对之间的平均ΔEab值分别为4.4（1.8）、7.3（3.2）、5.6（2.8）和6.5（1.8），而所有比较色号对的平均色差为5.8（2.8）。对于A2色号，ΔL、Δaab和Δbab值分别相差5.3、2.3和6.7。B2色号的相应值相差10.5、2.2和11.5；C2色号为7.9、2.2和4.3；不透明A2色号为7.9、1.4和4.4。用于比较色号和复合材料对之间ΔE*ab值的Fisher PLSD临界区间分别为0.07和0.15（P <.0001，检验效能1.00）。
总体而言，相同色号指定的色号对颜色匹配度较差。A2色号对的颜色匹配最佳，其次是C2、B2和不透明A2色号对。
