Private practice, Athens, Greece.
Department of Prosthodontics, National and Kapodistrian University of Athens, Dental School, Athens, Greece.
J Prosthodont. 2022 Jan;31(1):65-71. doi: 10.1111/jopr.13360. Epub 2021 May 27.
To assess the effect of commonly used solutions on color stability, gloss, and surface roughness of removable partial dental prostheses polymers.
Discs (n = 112) were made of a poly(etheretherketone) (PEEK) polymer, a polyamide, an acetal resin and a heat-cured poly(methylmethacrylate) PMMA acrylic resin polished according to manufacturers' instructions. Seven specimens of each material were immersed in coffee, red wine, coca cola and distilled water for 30 days at 37 C. Changes of color (ΔΕ*) and color coordinates Lαb* after immersion were calculated with a colorimeter. Changes in the values of gloss and surface roughness parameters (Sa, Sz, Str, Sdr, Sci, Svi) were also measured. Two-way ANOVA and pairwise comparisons were used to evaluate the effect of material and staining solution on parameter value alterations (α = 0.05).
The two-way ANOVA revealed that the interaction between material and staining solution significantly affected color changes after immersion [F(9,96) = 44.67, p < 0.001]. PEEK presented the lowest color change (ΔΕ* = 3.83 ± 2) while polyamide had the highest color change overall (ΔΕ* = 14.59 ± 8.65) (p < 0.001). Coffee caused the highest color (ΔΕ* = 13.08 ± 6.98) and gloss changes (ΔG = -6.36 ± 19.2 GU) among different solutions (p < 0.001). PEEK showed the highest alteration of gloss (ΔG = -11.31 ± 15.49 GU), with significant difference with the other three materials (p < 0.001). Insignificant interaction of material and immersing solution was found for surface roughness parameters (p > 0.05).
Among the materials tested, PEEK seemed to be the most stable material when subjected to common, everyday staining solutions. Therefore, PEEK could be a viable solution for an RPDP framework fabrication, expanding the material list of prosthetic options. Further research and clinical trials are required to confirm the above statement.
评估常用溶液对可摘局部义齿聚合物的颜色稳定性、光泽度和表面粗糙度的影响。
采用聚醚醚酮（PEEK）聚合物、聚酰胺、缩醛树脂和热固化聚甲基丙烯酸甲酯（PMMA）丙烯酸树脂制作圆盘（n=112），根据制造商的说明进行抛光。将每种材料的 7 个样本浸入咖啡、红酒、可口可乐和蒸馏水 37°C 中 30 天。用比色计计算浸泡后颜色（ΔΕ*）和颜色坐标 Lab*的变化。还测量了光泽度和表面粗糙度参数（Sa、Sz、Str、Sdr、Sci、Svi）值的变化。采用双因素方差分析和两两比较来评估材料和染色溶液对参数值变化的影响（α=0.05）。
双因素方差分析显示，材料和染色溶液之间的相互作用显著影响浸泡后的颜色变化[F（9,96）=44.67，p<0.001]。PEEK 的颜色变化最小（ΔΕ*=3.83±2），而聚酰胺的整体颜色变化最大（ΔΕ*=14.59±8.65）（p<0.001）。咖啡引起的颜色（ΔΕ*=13.08±6.98）和光泽度变化（ΔG=-6.36±19.2 GU）在不同溶液中最高（p<0.001）。PEEK 的光泽度变化最大（ΔG=-11.31±15.49 GU），与其他三种材料有显著差异（p<0.001）。材料和浸泡溶液之间的表面粗糙度参数的相互作用不显著（p>0.05）。
在所测试的材料中，PEEK 在受到常见日常染色溶液的影响时似乎是最稳定的材料。因此，PEEK 可能是可摘局部义齿修复体框架制造的可行解决方案，扩大了修复体选择的材料清单。需要进一步的研究和临床试验来证实上述说法。
