干打磨和湿打磨抛光对纳米复合树脂和纳米混杂复合树脂颜色变化和不透明度的影响。
Effect of dry and wet finishing and polishing on color change and opacity of nanofill and nanohybrid composites.
机构信息
School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
出版信息
BMC Oral Health. 2024 Feb 28;24(1):287. doi: 10.1186/s12903-024-03944-0.
BACKGROUND
As superior esthetic is one of the main reasons for using composite resins, it is very important to be familiar with factors and techniques affecting their optical properties and appearance.
AIM
The aim of this study was comparing the effect of finishing and polishing with and without water coolant, on the color change and opacity of composite resin materials.
METHODS
Composites used for preparing samples were Z250 (microhybrid), Z350XT (nanofilled), and Z550 (nanohybrid). Then divided into 4 groups of 5 depending on finishing and polishing technique (dry or wet) and time (immediate and after twenty-four hours). After polishing, samples were assessed using a spectrophotometer. Color change and opacity were determined. Data was analyzed using Kolmogorov-Smirnov, ANOVA and Tukey HSD tests.
RESULTS
Type of material at both time had a significant effect on ΔE and opacity. Our results in dry and wet technique immediately(T0) showed that the highest and lowest ΔE and opacity belong to Z350XT (p < 0.001). After Twenty-four hours (T24), opacity of Z250 in wet condition was higher than dry condition (p < 0.001).
CONCLUSIONS
Wet or dry technique was only effective on color in immediate polishing. Regarding opacity, technique was only effective in case of delayed polishing.
背景
由于美学效果是使用复合树脂的主要原因之一，因此熟悉影响其光学性能和外观的因素和技术非常重要。
目的
本研究的目的是比较有无水冷却剂的情况下，对复合树脂材料的颜色变化和不透明度的影响。
方法
用于制备样本的复合材料为 Z250（微混合）、Z350XT（纳米填充）和 Z550（纳米混合）。然后根据研磨和抛光技术（干或湿）和时间（立即和 24 小时后）将其分为 4 组，每组 5 个。抛光后，使用分光光度计评估样品。确定颜色变化和不透明度。使用 Kolmogorov-Smirnov、ANOVA 和 Tukey HSD 检验分析数据。
结果
在两个时间点，材料类型对 ΔE 和不透明度均有显著影响。我们在干、湿技术即时（T0）的结果表明，Z350XT 的 ΔE 和不透明度最高和最低（p<0.001）。24 小时后（T24），Z250 在湿条件下的不透明度高于干条件（p<0.001）。
结论
在即时抛光时，干或湿技术仅对颜色有效。至于不透明度，只有在延迟抛光时，技术才有效。
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