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首页> 外文期刊>The Journal of Prosthetic Dentistry >In vitro staining effects of stannous fluoride and sodium fluoride on ceramic material
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In vitro staining effects of stannous fluoride and sodium fluoride on ceramic material

机译：氟化亚锡和氟化钠对陶瓷材料的体外染色效果

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Statement of problem. Long-term fluoride application on the teeth of patients receiving radiation therapy for head and neck tumors results in excessive staining and roughening of ceramic restorations. Purpose. The purpose of this in vitro study was to compare the staining effects of 2 fluoride treatments on ceramic disks by simulating 1 year of clinical exposure at 10 minutes per day. In addition, 2 different surface preparations were tested. Material and methods. Eighty ceramic disks (IPS Empress), 20 x 2 mm, were fabricated. Half of the disks were glazed, and the remaining disks were polished. All disks were brushed for 3 minutes with a soft-bristle power toothbrush and mild dentifrice (baseline) and were immersed in 1 of the 2 fluoride products (0.4% SnF_2, Gel-Kam Gel, or 1.1% NaF, Prevident 5000) for 10 days (n=20). Means and standard deviations of color change (triangle open E), surface roughness (Ra, um), and surface gloss (GU) of the ceramic material were measured with a reflection spectrophotometer, a profilom-eter, and a gloss meter, respectively, at baseline and after fluoride treatment. Two- and 3-way ANOVA (a=.05), with surface preparation (polished vs. glazed) and fluoride treatment (0.4% SnF_2 or 1.1% NaF) as independent variables and condition (baseline vs. after fluoride treatment) as a repeated measure, was used to analyze the data. Fisher's PLSD intervals (alpha=.05) were calculated for comparisons among the means. Results. The polished specimens had significantly higher AE values, significantly higher surface gloss values, and significantly lower surface roughness values than the glazed specimens before fluoride treatment (P<.001). After both fluoride treatments, ceramic disks exhibited significantly higher surface roughness values when polished and significantly lower surface gloss values when glazed or polished (P<.001). The glazed specimens presented significantly higher surface roughness (P<.001) and lower surface gloss values (P<.001) when treated with 0.4% SnF_2 as compared to NaF. For the polished specimens, there was no significant difference in surface roughness and surface gloss values between the 2 fluoride treatments. Conclusions. Use of 0.4% SnF_2 and 1.1% NaF gels, in vitro, caused significant color change in the polished IPS Empress ceramic disks. Polishing of the ceramic surface before immersion in either fluoride agent caused the ceramic tested to be more resistant to etching by the 2 solutions tested. The NaF caused less deterioration of the porcelain surface and was less stain inducing than SnF_2.
机译：问题陈述。在接受放射治疗的头颈部肿瘤患者的牙齿上长期使用氟化物会导致陶瓷修复体过度着色和粗糙化。目的。这项体外研究的目的是通过模拟每天10分钟的一年临床暴露情况，比较2种氟化物处理对陶瓷盘的染色效果。另外，测试了两种不同的表面制剂。材料与方法。制作了80个20 x 2 mm的陶瓷盘（IPS Empress）。一半的磁盘上光，其余的磁盘抛光。用软毛电动牙刷和中性洁牙剂（基线）将所有磁盘刷3分钟，然后浸入2种氟化物产品（0.4％SnF_2，Gel-Kam Gel或1.1％NaF，Prevident 5000）中的一种中，浸泡10次天（n = 20）。分别用反射分光光度计，轮廓仪和光泽度仪测量陶瓷材料的变色（三角形开口E），表面粗糙度（Ra，um）和表面光泽度（GU）的平均值和标准偏差，在基线和氟化物处理后。两向和三向方差分析（a = .05），以表面处理（抛光或上光）和氟化物处理（0.4％SnF_2或1.1％NaF）为独立变量，状况（基线与氟化物处理后）为独立变量重复测量，用于分析数据。计算Fisher的PLSD间隔（alpha = .05），以比较平均值。结果。与氟化物处理之前的玻璃样品相比，抛光的样品的AE值明显更高，表面光泽度值明显更高，并且表面粗糙度值明显更低（P <.001）。经过两次氟化处理后，陶瓷盘在抛光时表现出明显较高的表面粗糙度值，在上釉或抛光时表现出明显较低的表面光泽度（P <.001）。与NaF相比，用0.4％SnF_2处理时，釉面样品的表面粗糙度（P <.001）和表面光泽度值（P <.001）明显较高。对于抛光的样品，两种氟化物处理之间的表面粗糙度和表面光泽度值无显着差异。结论。在体外使用0.4％SnF_2和1.1％NaF凝胶会在抛光的IPS Empress陶瓷磁盘中引起明显的颜色变化。在浸入任何一种氟化剂中之前对陶瓷表面进行抛光会导致被测陶瓷对两种被测溶液的耐蚀性更高。与SnF_2相比，NaF引起的瓷器表面变质更小，并且污渍的诱导更少。

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