Zotti Francesca, Ferrari Francesca, Penazzo Mattia, Lanzaretti Giorgia, Zerman Nicoletta
Section of Dentistry and Maxillofacial Surgery, Department of Surgical Sciences, Pediatrics and Gynecology, University of Verona, 37134 Verona, Italy.
Private Practice, 37134 Verona, Italy.
Materials (Basel). 2024 Oct 18;17(20):5103. doi: 10.3390/ma17205103.
The purpose of this study was to evaluate the chromatic adaptability and color stability of two different composite resins, Omnichroma and Estelite Bulk-Fill Flow, in Class V restorations at different times.
Standardized Class V cavities were prepared on the labial surface of 34 extracted intact and noncarious human permanent molars. The dental elements were randomly divided into two groups according to the resin composite material. Group 1 was restored with Omnichroma (Tokuyama Dental Corporation Inc., Tokyo, Japan) and Group 2 was restored with Estelite BulkFill Flow Universal (Tokuyama Dental Corporation Inc., Tokyo, Japan). Color properties were assessed using a spectrophotometer, SpectroShadeTM Micro (MHT Optic Research, Niederhasli, Switzerland), at baseline (T0), immediately after Class V restoration (T1), 24 h after restoration (T2) and after thermocycling (T3) (ISO/TS 11405, 2015 protocol). Color difference (ΔE) was analyzed with a Student's -test and a Wilcoxon-Mann-Whitney test to evaluate the differences, in terms of chromatic adaptability, between the two materials (inter-group analysis) while Kruskal-Wallis test e Two-way ANOVA statistical tests were used to evaluate the color stability of each material over time (intra-group analysis).
Regarding the inter-group analysis, there were no statistically significant differences between the two materials in all the comparisons: T0-T1 ( = 0.9025), T0-T2 ( = 0.2779), T0-T3 ( = 0.4694). Moreover, both groups showed an average ΔE > 2. In the intra-group analysis, no statistically significant differences were observed in either Group 1 ( = 0.954) or Group 2 ( = 0.8654).
The in vitro color matching, assessed by spectrophotometry, of the two tested resin composites does not vary at different time intervals. Furthermore, even though both composites use different mechanisms to produce the color the human eye perceives, they show very similar chromatic adaptability.
本研究旨在评估两种不同的复合树脂Omnichroma和Estelite Bulk-Fill Flow在Ⅴ类洞修复中不同时间的颜色适应性和颜色稳定性。
在34颗完整无龋的拔除人类恒牙唇面制备标准化的Ⅴ类洞。根据复合树脂材料将牙体随机分为两组。第1组用Omnichroma（日本东京德山齿科株式会社）修复，第2组用Estelite BulkFill Flow Universal（日本东京德山齿科株式会社）修复。在基线（T0）、Ⅴ类洞修复后即刻（T1）、修复后24小时（T2）和热循环后（T3）（ISO/TS 11405，2015方案），使用分光光度计SpectroShadeTM Micro（瑞士下哈斯利的MHT光学研究公司）评估颜色特性。用学生t检验和Wilcoxon-Mann-Whitney检验分析颜色差异（ΔE），以评估两种材料在颜色适应性方面的差异（组间分析），同时使用Kruskal-Wallis检验和双向方差分析统计检验评估每种材料随时间的颜色稳定性（组内分析）。
关于组间分析，在所有比较中两种材料之间均无统计学显著差异：T0-T1（P = 0.9025），T0-T2（P = 0.2779），T0-T3（P = 0.4694）。此外，两组的平均ΔE均>2。在组内分析中，第1组（P = 0.954）和第2组（P = 0.8654）均未观察到统计学显著差异。
通过分光光度法评估，两种测试复合树脂的体外颜色匹配在不同时间间隔内没有变化。此外，尽管两种复合材料产生人眼所感知颜色的机制不同，但它们表现出非常相似的颜色适应性。
