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首页> 外文期刊>The Journal of Prosthetic Dentistry >Optical behaviors of esthetic CAD-CAM restorations after different surface finishing and polishing procedures and UV aging: An in?vitro study
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Optical behaviors of esthetic CAD-CAM restorations after different surface finishing and polishing procedures and UV aging: An in?vitro study

机译：不同表面精加工和抛光程序和紫外老化后美学CAD-CAM修复的光学行为：体外研究

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Statement of problemEsthetic computer-aided design and computer-aided manufacturing (CAD-CAM) materials have various chemical compositions and can be prepared by using different finishing and polishing procedures. Their optical properties may change over time, depending on these factors. However, information about their stain resistance is still scarce. PurposeThe purpose of this in?vitro study was to evaluate the optical properties of esthetic CAD-CAM materials after different finishing and polishing procedures and ultraviolet (UV) aging. Material and methodsLava Ultimate, Cerasmart, Vita Enamic, Vita Suprinity, and Vita Mark II materials were used. A total of 150 specimens (14×12×1 mm) were prepared (n=10). A spectrophotometer was used to measure color parameters after different finishing and polishing procedures (control, manual polishing, glazing) and ultraviolet (UV) aging. Lightness (L*), green-red (a*), blue-yellow (b*), chroma (Ch), and hue (h) parameters were recorded, and change in lightness (ΔE*) values were calculated. Statistical analyses were performed with 2-way ANOVA, the Fisher least significant difference test, and the paired samplesttest (α=.05). ResultsSignificant interactions were noted between the aging conditions, material type, and finishing and polishing procedures for all evaluated parameters (P<.001). Vita Suprinity and Vita Mark II glazing groups resulted in significantly higher L1* values (P<.05) after the first color measurements. The b1* and C1values of Vita Suprinity were higher than for other materials (P<.05). The highest ΔE* value was observed in the Lava Ultimate-glazing group (ΔE*=22.7) and the lowest in the Vita Mark II-control group (ΔE*=0.86). ConclusionsThe optical properties of CAD-CAM materials can be affected by the material type and the applied surface finishing and polishing procedure. Manual polishing seems to be a better choice for Lava Ultimate and Cerasmart and glazing for Vita Enamic. For ceramic materials, manual polishing or glazing can be recommended in terms of color stability.
机译：讨厌的计算机辅助设计和计算机辅助制造（CAD-CAM）材料的陈述具有各种化学组成，可以通过使用不同的精加工和抛光程序来制备。根据这些因素，它们的光学性质可能会随时间变化。然而，有关其污点抗性的信息仍然是稀缺的。其它目的在玻璃体体外研究中的目的是评估不同精加工和抛光程序和紫外（UV）老化后的酵母CAD-CAM材料的光学性质。使用材料和方法，使用Cerasmart，Vita稀菊，Vita总结和Vita Mark II材料。制备总共150个样品（14×12×1mm）（n = 10）。分光光度计在不同的精加工和抛光程序（对照，手动抛光，玻璃窗）和紫外（UV）老化后测量颜色参数。亮度（L *），绿色红色（A *），蓝黄色（B *），色度（CH）和色调（H）参数被记录，并计算亮度的变化（ΔE*）值。用双向ANOVA，FISHER最不显着差异测试和配对的SAMPLESTTEST（α= .05）进行统计分析。在所有评估参数的老化条件，材料类型和精加工和抛光过程之间注意到结果相互作用（P <.001）。 Vita Hiphital和Vita Mark II玻璃玻璃团导致第一种颜色测量后的L1 *值（P <.05）显着更高。 Vita的B1 *和C1值高于其他材料（P <.05）。在熔岩终极玻璃基团（ΔE* = 22.7）中观察到最高ΔE*值，并且在Vita Mark II对照组中最低（ΔE* = 0.86）。结论CAD-CAM材料的光学性质可受到材料型和施加的表面精加工和抛光过程的影响。手动抛光似乎是熔岩终极和Cerasmart和玻璃玻璃的更好选择。对于陶瓷材料，可以在色彩稳定性方面推荐手动抛光或玻璃。

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