延迟完成/抛光对牙齿颜色修复材料的表面粗糙度、硬度和光泽度的影响。
Effects of delayed finishing/polishing on surface roughness, hardness and gloss of tooth-coloured restorative materials.
作者信息
Yazici A Ruya, Tuncer Duygu, Antonson Sibel, Onen Alev, Kilinc Evren
机构信息
Associate Professor, Hacettepe University, Faculty of Dentistry, Department of Conservative Dentistry, Ankara, Turkey.
出版信息
Eur J Dent. 2010 Jan;4(1):50-6.
OBJECTIVES
The aim of this study was to investigate the effect of delayed finishing/polishing on the surface roughness, hardness and gloss of tooth-coloured restorative materials.
METHODS
Four different tooth-coloured restoratives: a flowable resin composite- Tetric Flow, a hybrid resin composite- Venus, a nanohybrid resin composite- Grandio, and a polyacid modified resin composite- Dyract Extra were used. 30 specimens were made for each material and randomly assigned into three groups. The first group was finished/polished immediately and the second group was finished/polished after 24 hours. The remaining 10 specimens served as control. The surface roughness of each sample was recorded using a laser profilometer. Gloss measurements were performed using a small-area glossmeter. Vickers microhardness measurements were performed from three locations on each specimen surface under 100g load and 10s dwell time. Data for surface roughness and hardness were analyzed by Kruskal Wallis test and data for gloss were subjected to one-way ANOVA and Tukey test (P <.05).
RESULTS
The smoothest surfaces were obtained under Mylar strip for all materials. While there were no significant differences in surface roughness of immediate and delayed finished/polished Dyract Extra samples, immediately finished/polished Venus and Grandio samples showed significantly higher roughness than the delayed polished samples (P <.05). In Tetric Flow samples, immediately finishing/polishing provided smoother surface than delayed finishing/polishing (P <.05). The highest gloss values were recorded under Mylar strip for all materials. While delayed finishing/polishing resulted in a significantly higher gloss compared to immediate finishing/polishing in Venus samples (P <.05), no differences were observed between delayed or immediate finishing/polishing for the other materials (P>.05). The lowest hardness values were found under Mylar strip. Delayed finishing/polishing significantly increased the hardness of all materials.
CONCLUSIONS
The effect of delayed finishing/polishing on surface roughness, gloss and hardness appears to be material dependent.
目的
本研究旨在调查延迟修整/抛光对牙齿颜色修复材料的表面粗糙度、硬度和光泽度的影响。
方法
使用四种不同的牙齿颜色修复材料：一种流动树脂复合材料——Tetric Flow，一种混合树脂复合材料——Venus，一种纳米混合树脂复合材料——Grandio，以及一种聚酸改性树脂复合材料——Dyract Extra。每种材料制作30个样本，并随机分为三组。第一组立即进行修整/抛光，第二组在24小时后进行修整/抛光。其余10个样本作为对照。使用激光轮廓仪记录每个样本的表面粗糙度。使用小面积光泽仪进行光泽度测量。在100g载荷和10s保压时间下，从每个样本表面的三个位置进行维氏显微硬度测量。表面粗糙度和硬度数据通过Kruskal Wallis检验进行分析，光泽度数据进行单因素方差分析和Tukey检验（P<.05）。
结果
所有材料在聚酯薄膜条下获得的表面最光滑。虽然立即和延迟修整/抛光的Dyract Extra样本的表面粗糙度没有显著差异，但立即修整/抛光的Venus和Grandio样本的粗糙度显著高于延迟抛光的样本（P<.05）。在Tetric Flow样本中，立即修整/抛光比延迟修整/抛光提供更光滑的表面（P<.05）。所有材料在聚酯薄膜条下记录的光泽度值最高。虽然延迟修整/抛光在Venus样本中导致的光泽度显著高于立即修整/抛光（P<.05），但其他材料在延迟或立即修整/抛光之间未观察到差异（P>.05）。在聚酯薄膜条下发现的硬度值最低。延迟修整/抛光显著提高了所有材料的硬度。
结论
延迟修整/抛光对表面粗糙度、光泽度和硬度的影响似乎取决于材料。
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