Sahin Onur, Koroglu Aysegül, Dede Doğu Ömür, Yilmaz Burak
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Bülent Ecevit University, Zonguldak, Turkey.
Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey.
J Prosthet Dent. 2016 Oct;116(4):610-616. doi: 10.1016/j.prosdent.2016.03.007. Epub 2016 May 11.
The effects of surface sealant agents on the surface roughness and color stability of denture base materials are unknown.
The purpose of this in vitro study was to evaluate the effects of different polishing methods on the surface roughness and color stability of denture base materials.
A total of 120 specimens were fabricated from 2 poly(methyl methacrylate) (PMMA) and 1 polyamide denture base materials and divided into 4 groups (n=10 in each group) according to the applied surface treatment procedure: conventional polishing (control) and 3 surface sealant coupling methods. Surface roughness average (R) values were measured using a profilometer. Color parameters were measured using a spectrophotometer before and after being stained with coffee. Color differences (CIEDE 2000 [ΔE]) were calculated. Data were statistically analyzed using 2-way ANOVA and Tukey honest significant difference test (α=.05).
No statistically significant difference were found between surface roughness values of the control and those of the specimens treated using a surface sealant agent (P>.05). The highest color difference was calculated for the polyamide control group. Statistically significant differences were found between the control group and the group treated with the polyamide surface sealant agent (P<.05).
All specimens had a surface roughness value higher than the plaque accumulation threshold (0.20 μm). The color changes observed were clinically unacceptable, except for conventionally polished and one type of surface sealant applied microwave polymerized PMMA denture base material.
表面封闭剂对义齿基托材料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不同抛光方法对义齿基托材料表面粗糙度和颜色稳定性的影响。
用2种聚甲基丙烯酸甲酯（PMMA）和1种聚酰胺义齿基托材料制作120个试件，根据所采用的表面处理程序分为4组（每组n = 10）：传统抛光（对照组）和3种表面封闭剂耦合方法。使用轮廓仪测量表面粗糙度平均值（R）。在咖啡染色前后使用分光光度计测量颜色参数。计算颜色差异（CIEDE 2000 [ΔE]）。数据采用双向方差分析和Tukey诚实显著差异检验进行统计学分析（α = 0.05）。
对照组与使用表面封闭剂处理的试件的表面粗糙度值之间未发现统计学显著差异（P>0.05）。聚酰胺对照组计算出的颜色差异最大。对照组与聚酰胺表面封闭剂处理组之间存在统计学显著差异（P<0.05）。
所有试件的表面粗糙度值均高于菌斑积聚阈值（0.20μm）。观察到的颜色变化在临床上是不可接受的，但传统抛光和一种应用微波聚合PMMA义齿基托材料的表面封闭剂除外。
