Valizadeh Sara, Asiaie Zohreh, Kiomarsi Nazanin, Kharazifard Mohammad Javad
Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Iran.
Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Iran.
Dent Med Probl. 2020 Jan-Mar;57(1):31-38. doi: 10.17219/dmp/114099.
The success of composite resin restorations depends to a great extent on their color stability. However, discoloration is still a problem in composite resin restorations.
The aim of the study was to evaluate the effect of different staining solutions on the color stability of composite resins.
A total of 96 composite disks, 2 mm in height and 8 mm in diameter, were fabricated of 3 commercially available composite resins. The samples were divided into 4 groups of 8 and were immersed in 4 staining solutions: coffee, tea, soda, and artificial saliva. The color parameters of the samples were measured and recorded before as well as 2, 4 and 8 weeks after immersion by spectrophotometry, using the CIELAB color space. A color change (ΔE) ≤3.3 was considered the acceptable threshold for visual perception. The results were analyzed using the one-way analysis of variance (ANOVA) and Tukey's post hoc test (p < 0.05).
All the composite resins in the study showed discoloration in all the staining solutions. The ΔE of VertiseTM Flow was the highest in the tea solution. The lowest ΔE occurred in the FiltekTM Z250 composite in artificial saliva.
This in vitro study showed that the color stability of tooth-colored restorations can be influenced by dietary habits.
复合树脂修复体的成功在很大程度上取决于其颜色稳定性。然而，变色仍是复合树脂修复体存在的一个问题。
本研究旨在评估不同染色溶液对复合树脂颜色稳定性的影响。
用3种市售复合树脂制作了96个高度为2 mm、直径为8 mm的复合树脂圆盘。将样品分为4组，每组8个，分别浸入4种染色溶液中：咖啡、茶、苏打水和人工唾液。通过分光光度法，使用CIELAB颜色空间，在浸泡前以及浸泡2、4和8周后测量并记录样品的颜色参数。颜色变化（ΔE）≤3.3被认为是视觉感知的可接受阈值。结果采用单因素方差分析（ANOVA）和Tukey事后检验进行分析（p < 0.05）。
本研究中所有复合树脂在所有染色溶液中均出现变色。VertiseTM Flow在茶溶液中的ΔE最高。最低的ΔE出现在人工唾液中的FiltekTM Z250复合树脂中。
这项体外研究表明，牙齿颜色修复体的颜色稳定性可能受饮食习惯的影响。
