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首页> 外文期刊>The Journal of Prosthetic Dentistry >Color stability of provisional prosthodontic materials.
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Color stability of provisional prosthodontic materials.

机译：临时修复材料的颜色稳定性。

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STATEMENT OF PROBLEM: Discoloration of provisional prosthodontic materials may result in patient dissatisfaction and additional expense for replacement. PURPOSE: The purpose of this study was to determine the color stability of 5 provisional prosthodontic materials before and after immersion in distilled water or coffee for 20 days or exposure to ultraviolet (UV) light for 24 hours. MATERIAL AND METHODS: A total of 105 disc-shaped specimens (20+/-0.1 mm by 1+/-0.05 mm) were fabricated with 5 provisional prosthodontic materials: polyethyl methacrylate resins (Trim II), polymethyl methacrylate resins (Duralay; Alike), and bis-acryl methacrylate resin (Luxatemp; Integrity), according to manufacturers' instructions (n=21). Seven specimens of each material were randomly selected and immersed individually in distilled water (60 degrees C) or coffee (37 degrees C) for 20 days or exposed to UV irradiation for 24 hours, respectively. Color was measured as CIE L*a*b* with a colorimeter before and after the immersion or UV exposure. Color change (Delta E) was calculated and data were analyzed with 1-way ANOVA and the Tukey multiple comparisons test (alpha=.05). RESULTS: For specimens immersed in water, the color change of bis-acryl-methacrylate-based provisional materials (Integrity and Luxatemp) was significantly less than that of 3 methyl/ethyl methacrylate-based provisional materials (Trim II, Alike, and Duralay) (P<.002). After immersion in coffee, the 3 methyl/ethyl methacrylate-based provisional materials exhibited significantly less color change compared to the 2 bis-acryl methacrylate-based provisional materials (P<.0001). After ultraviolet irradiation, 2 bis-acryl methacrylate-based provisional materials showed significantly less color change than any of the 3 methyl/ethyl methacrylate-based provisional materials (P<.0001). CONCLUSION: Luxatemp and Integrity (bis-acryl-methacrylate-based resins) demonstrated acceptable color stability and were the most color-stable provisional prosthodontic materials tested compared to the methyl/ethyl methacrylate-based resins.
机译：问题陈述：临时修复材料的变色可能导致患者不满意，并需要额外的更换费用。目的：本研究旨在确定5种临时修复材料在浸入蒸馏水或咖啡中20天或暴露于紫外线（UV）24小时之前和之后的颜色稳定性。材料与方法：用5种临时修复材料制作了总共105个盘状样品（20 +/- 0.1毫米x 1 +/- 0.05毫米）：聚甲基丙烯酸乙酯树脂（Trim II），聚甲基丙烯酸甲酯树脂（Duralay;类似） ）和双丙烯酸甲基丙烯酸酯树脂（Luxatemp; Integrity），根据制造商的说明（n = 21）。每种材料的七个样本被随机选择，分别浸入蒸馏水（60摄氏度）或咖啡（37摄氏度）中20天或暴露于紫外线照射24小时。在浸没或UV暴露之前和之后，用比色计测量颜色为CIE L * a * b *。计算颜色变化（ΔE），并使用1向ANOVA和Tukey多重比较测试（alpha = .05）分析数据。结果：对于浸入水中的标本，基于双丙烯酸甲基丙烯酸酯的临时材料（完整性和Luxatemp）的颜色变化明显小于基于3甲基/甲基丙烯酸乙酯的临时材料（Trim II，Alike和Duralay）的颜色变化（P <.002）。浸泡在咖啡中后，基于3甲基/乙基甲基丙烯酸酯的临时材料与2基于二甲基丙烯酸双丙烯酸酯的临时材料相比，显示出明显更少的颜色变化（P <.0001）。紫外线照射后，两种基于甲基丙烯酸双丙烯酯的临时材料显示出比三种基于甲基丙烯酸甲酯/甲基丙烯酸乙酯的临时材料显着更少的颜色变化（P <.0001）。结论：Luxatemp和Integrity（基于双丙烯酸甲基丙烯酸酯的树脂）显示出可接受的颜色稳定性，并且与基于甲基丙烯酸甲酯/甲基丙烯酸乙酯的树脂相比，是经测试颜色稳定性最高的临时修复材料。

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