Şahin Onur, Dede Doğu Ömür, Köroğlu Ayşegül, Yılmaz Burak
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Bulent Ecevit University, Zonguldak, Turkey.
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey.
J Prosthet Dent. 2015 Jul;114(1):130-7. doi: 10.1016/j.prosdent.2015.02.009. Epub 2015 Apr 22.
Although various surface sealant agents are available and recommended for chairside polishing procedures, their effect on the surface roughness and color stability of denture teeth is not clear.
The purpose of this in vitro study was to evaluate the effect of sealant agents on the surface roughness and color stability of various denture tooth materials.
Eighty disk-shaped specimens were prepared for each type of denture tooth material (SR Vivodent, PMMA; Vitapan, reinforced-PMMA; SR Phonares II, composite resin). The specimens were assigned to 4 groups according to the surface treatment used (n=20): surface sealant agents (Palaseal; Heraeus Kulzer GmbH, Optiglaze; GC Corp Biscover; Bisco Inc) and a conventional laboratory polishing technique (control group). A thermal cycling procedure was applied for half of the specimens (n=10). The surface roughness (Ra) values of thermocycled and nonthermocycled specimens were measured with a profilometer. The CIELab color parameters of both thermocycled and nonthermocycled specimens were measured with a spectrophotometer at baseline and after 7-day storage in a coffee solution. The color differences were calculated from the CIEDE2000 (ΔE00) formula. Data were statistically analyzed with 3-way ANOVA and the Tukey HSD test (α=.05).
The type of tooth material, surface treatment technique, and their interactions were significant for Ra values, and each variable and their interactions were also significant for ΔE00 values (P<.05). Thermal cycling had a significant effect only on ΔE00 values (P<.05).
Palaseal and Optiglaze sealant agents provided smoother and more color-stable denture tooth surfaces than the conventional polishing technique. The use of the Biscover agent with SR Vivodent and Phonares II teeth increased the Ra values. The color of conventionally polished SR Vivodent and Phonares II teeth changed more with thermal cycling.
尽管有多种表面封闭剂可用于椅旁抛光程序并得到推荐，但它们对义齿牙齿表面粗糙度和颜色稳定性的影响尚不清楚。
本体外研究的目的是评估封闭剂对各种义齿牙齿材料表面粗糙度和颜色稳定性的影响。
为每种义齿牙齿材料（SR Vivodent，聚甲基丙烯酸甲酯；Vitapan，增强型聚甲基丙烯酸甲酯；SR Phonares II，复合树脂）制备80个圆盘形试件。根据所使用的表面处理方法将试件分为4组（n = 20）：表面封闭剂（Palaseal；贺利氏古莎有限公司，Optiglaze；GC公司Biscover；必思科公司）和传统实验室抛光技术（对照组）。对一半试件（n = 10）进行热循环程序。用轮廓仪测量热循环和未热循环试件的表面粗糙度（Ra）值。在基线时以及在咖啡溶液中储存7天后，用分光光度计测量热循环和未热循环试件的CIELab颜色参数。根据CIEDE2000（ΔE00）公式计算颜色差异。数据采用三因素方差分析和Tukey HSD检验进行统计学分析（α = 0.05）。
牙齿材料类型、表面处理技术及其相互作用对Ra值有显著影响，每个变量及其相互作用对ΔE00值也有显著影响（P < 0.05）。热循环仅对ΔE00值有显著影响（P < 0.05）。
与传统抛光技术相比，Palaseal和Optiglaze封闭剂可使义齿牙齿表面更光滑且颜色更稳定。Biscover剂与SR Vivodent和Phonares II牙齿一起使用会增加Ra值。传统抛光的SR Vivodent和Phonares II牙齿的颜色随热循环变化更大。
