Zhang Luyao, Yu Yang, Li Sinuo, Yang Fan, Liang Shanshan, Xing Wenzhong
J Am Dent Assoc. 2024 Dec;155(12):1012-1021. doi: 10.1016/j.adaj.2024.09.003. Epub 2024 Nov 4.
The purpose of this study was to investigate the color difference (ΔE) and translucency changes (ΔTP) of resin-composite computer-aided design and computer-aided manufacturing blocks after exposure to staining solutions.
A total of 250 rectangular specimens (1.0-mm thick) were prepared from 4 resin-based composites (Brilliant Crios [Coltène Whaledent], Lava Ultimate [3M], Hyramic [Upcera], and Shofu HC [Shofu]) and a polymer-infiltrated ceramic network material (Vita Enamic [Vita Zahnfabrik]). These specimens were divided into 5 groups and stored in 5 solutions (artificial saliva, cola, black tea, coffee, red wine) at 37 °C for 3, 7, and 14 days to simulate approximately 3, 7, and 14 months, respectively, of clinical staining in the oral environment. Then, toothbrushing was conducted for 4 minutes every 24 hours of immersion to remove extrinsic staining. Measurements of color coordinates were taken at baseline and subsequent testing intervals, and changes in color and translucency were calculated.
The results of the 3-way repeated-measures analysis of variance indicated that material, staining beverages, and time interval and the interactions between these factors collectively affected the alterations in both color and translucency (P < .001). At the 14-day immersion period, the ΔE values of all tested materials varied from 0.43 to 2.12 and were clinically acceptable (ΔE < 1.8), except for Lava Ultimate and Hyramic in red wine. All materials showed a decrease in translucency, with the ΔTP values ranging from -0.23 through -1.34 over 14 days and were clinically acceptable (translucency acceptability threshold < 2.62).
Differences in color and translucency changes were observed between resin-based composites and polymer-infiltrated ceramic network material. All tested materials showed acceptable color and translucency changes when exposed to different staining solutions after the 14-day staining and toothbrushing simulation.
Discoloration of resin-matrix ceramics due to immersion in solution is related to material type and solutions but is generally acceptable. The dietary habits of the patient should be considered in material selection.
本研究旨在调查树脂基复合材料计算机辅助设计与计算机辅助制造块在暴露于染色溶液后的颜色差异（ΔE）和透明度变化（ΔTP）。
从4种树脂基复合材料（Brilliant Crios [库尔齿科]、Lava Ultimate [3M]、Hyramic [优赛拉]和松风HC [松风]）以及一种聚合物渗透陶瓷网络材料（维他易美[维他齿科]）制备了总共250个矩形试件（厚1.0毫米）。这些试件分为5组，并在37℃下分别储存在5种溶液（人工唾液、可乐、红茶、咖啡、红酒）中3天、7天和14天，以分别模拟口腔环境中大约3个月、7个月和14个月的临床染色情况。然后，在每次浸泡24小时后进行4分钟的刷牙以去除外源性染色。在基线和随后的测试间隔进行颜色坐标测量，并计算颜色和透明度的变化。
三因素重复测量方差分析结果表明，材料、染色饮料、时间间隔以及这些因素之间的相互作用共同影响了颜色和透明度的变化（P <.001）。在浸泡14天时，除红酒中的Lava Ultimate和Hyramic外，所有测试材料的ΔE值在0.43至2.12之间，临床上可接受（ΔE < 1.8）。所有材料的透明度均降低，14天内ΔTP值在 -0.23至 -1.34之间，临床上可接受（透明度可接受阈值 < 2.62）。
树脂基复合材料与聚合物渗透陶瓷网络材料在颜色和透明度变化方面存在差异。在经过14天染色和刷牙模拟后，所有测试材料在暴露于不同染色溶液时均表现出可接受的颜色和透明度变化。
树脂基陶瓷因浸泡在溶液中而变色与材料类型和溶液有关，但通常是可接受的。在材料选择时应考虑患者的饮食习惯。
