Dede Doğu Ömür, Şahin Onur, Koroglu Aysegül, Yilmaz Burak
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey.
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Bülent Ecevit University, Zonguldak, Turkey.
J Prosthet Dent. 2016 Jul;116(1):119-28. doi: 10.1016/j.prosdent.2015.11.024. Epub 2016 Feb 26.
The effect of sealant agents on the surface roughness and color stability of nanohybrid composite resins is unknown.
The purpose of this in vitro study was to evaluate the effect of sealant agents on the surface roughness and color stability of 4 nanohybrid composite resin materials.
Forty disks (10×2 mm) were fabricated for each nanohybrid composite resin material (Z-550, Tetric EvoCeram, Clearfill Majesty, Ice) (N=160) and divided into 4 surface treatment groups: 1 conventional polishing (control) and 3 different sealant agent (Palaseal, Optiglaze, BisCover) coupling groups (n=10). The specimens were thermocycled, and surface roughness (Ra) values were obtained with a profilometer. Scanning electron microscope images were also recorded. CIELab color parameters of each specimen were measured with a spectrophotometer before and after 7 days of storage in a coffee solution. Color differences were calculated by the CIEDE 2000 (ΔE00) formula. The data were statistically analyzed by 2-way ANOVA and by the Tukey HSD test (α=.05).
The surface treatment technique significantly affected the Ra values of the composite resins tested (P<.001). The interaction between the surface treatment technique and composite resin material was also significant for ΔE00 values (P<.05). Within the composite resin groups, significant decreases in Ra were observed only for the Palaseal agent coupled composite resin groups (except Ice) compared with the control groups (P<.05). Scanning electron microscope images revealed rougher surfaces with conventionally polished groups compared with test groups. Conventionally polished groups had the highest ΔE00 (3.09 to 3.49) values for each composite resin group, except for BisCover applied Clearfill Majesty (P<.05). Within the composite resin groups, significant differences were observed between the color change seen with BisCover and other sealants for Clearfill Majesty composite resin (P<.05).
Using Palaseal agent on all tested composite resins except for Ice produced smoother surfaces. All surface sealant agents provided less discoloration of nanohybrid composite resins after coffee staining compared with conventional polishing except for BisCover applied Clearfill Majesty composite resin.
封闭剂对纳米混合复合树脂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4种纳米混合复合树脂材料表面粗糙度和颜色稳定性的影响。
为每种纳米混合复合树脂材料（Z - 550、Tetric EvoCeram、Clearfill Majesty、Ice）制作40个圆盘（10×2 mm）（N = 160），并分为4个表面处理组：1个常规抛光（对照组）和3个不同封闭剂（Palaseal、Optiglaze、BisCover）偶联组（n = 10）。对标本进行热循环处理，并用轮廓仪获得表面粗糙度（Ra）值。还记录了扫描电子显微镜图像。在咖啡溶液中储存7天前后，用分光光度计测量每个标本的CIELab颜色参数。通过CIEDE 2000（ΔE00）公式计算颜色差异。数据通过双向方差分析和Tukey HSD检验进行统计学分析（α = 0.05）。
表面处理技术对测试的复合树脂的Ra值有显著影响（P < 0.001）。表面处理技术与复合树脂材料之间的相互作用对ΔE00值也有显著影响（P < 0.05）。在复合树脂组中，与对照组相比，仅Palaseal剂偶联的复合树脂组（Ice除外）的Ra值显著降低（P < 0.05）。扫描电子显微镜图像显示，与测试组相比，常规抛光组的表面更粗糙。除了应用BisCover的Clearfill Majesty外，每个复合树脂组常规抛光组的ΔE00值最高（3.09至3.49）（P < 0.05）。在复合树脂组中，观察到Clearfill Majesty复合树脂中BisCover与其他封闭剂引起的颜色变化存在显著差异（P < 0.05）。
除Ice外，在所有测试的复合树脂上使用Palaseal剂可产生更光滑的表面。与常规抛光相比，除应用BisCover的Clearfill Majesty复合树脂外，所有表面封闭剂在咖啡染色后使纳米混合复合树脂的变色更少。
