Effects of Surface Treatments and Mouth Rinses on the Roughness and Color Stability of Interim Restorations Produced through Additive Manufacturing.

Ekin Gazioglu, Deger Ongul
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Abstract

Purpose: The effect of mouth rinses on staining and roughness of interim restorations produced by additive manufacturing is unclear. This study investigated how surface treatments and mouth rinses affect staining, surface roughness, and the role of polishing on staining.

Methods: 320 disc-shaped specimens were produced from four resin materials (n=80) using conventional and additive methods. Each group was divided into two groups (n=40) according to surface applications: conventional (Group C) and sealant (Group S). After measuring surface roughness, groups were divided into four subgroups (n=10) and immersed in mouth rinses: LISTERINE (LIS), chlorhexidine gluconate 0.2% (CHX), chlorhexidine gluconate 0.1% (ELU), and artificial saliva (AS). Specimens were stored for one day (T1) and seven days (T2) in these solutions. Color measurements were performed before and after storage using a spectrophotometer, and color differences were calculated via the CIELab system. Post assessment, specimens were polished, and ∆E values were remeasured. Data were statistically analyzed with 1-Way ANOVA and Bonferroni tests (α=0.05).

Results: The highest surface roughness values were observed in the PMMA, and the lowest were in printed groups among the conventional and sealanted groups (P < .05). LIS had the highest ∆E values against all mouth rinses. The surface sealant applied groups showed the lowest ∆E values and surface roughness in all time points. The process of polishing reduced ∆E values in all tested groups.

Conclusions: Printed resins have sufficient optical and surface properties for interim restorations. Long-term use of mouth rinses may cause discolouration but using surface sealant and polishing may reduce this discolouration.

表面处理和口腔冲洗对增材制造中期修复体粗糙度和颜色稳定性的影响。
目的:目前尚不清楚漱口水对增材制造临时修复体的染色和粗糙度的影响。本研究探讨了表面处理和漱口水如何影响染色、表面粗糙度以及抛光对染色的作用。方法:采用常规和增材法制备4种树脂材料共320例(n=80)盘状标本。每组按表面应用分为常规组(C组)和密封剂组(S组)两组(n=40)。测量表面粗糙度后,将各组分为4个亚组(n=10),分别浸入漱口水中:李斯德林(LIS)、葡萄糖酸氯己定0.2% (CHX)、葡萄糖酸氯己定0.1% (ELU)和人工唾液(AS)。标本在这些溶液中分别保存1天(T1)和7天(T2)。使用分光光度计测量存储前后的颜色,并通过CIELab系统计算色差。评估后,对标本进行抛光,并重新测量∆E值。资料采用单因素方差分析和Bonferroni检验进行统计学分析(α=0.05)。结果:在常规组和密封组中,PMMA组的表面粗糙度值最高,打印组的表面粗糙度值最低(P < 0.05)。LIS对所有漱口水的∆E值最高。各时间点表面涂胶组的∆E值和表面粗糙度最低。抛光过程降低了各试验组的∆E值。结论:打印树脂具有足够的光学和表面特性,可用于中期修复。长期使用漱口水可能会导致变色,但使用表面密封剂和抛光可以减少这种变色。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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