In vitro evaluation of surface roughness, color stability, and color masking of provisional restoration materials for veneers and crowns.
In vitro evaluation of surface roughness, color stability, and color masking of provisional restoration materials for veneers and crowns.
复制标题
对贴面和牙冠临时修复材料的表面粗糙度、颜色稳定性和颜色遮蔽进行体外评估。
DOI：
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发表时间：
2020
影响因子：
1.7
通讯作者：
C. Sampaio
中科院分区：
文献类型：
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作者：
P. Atria;I. Lagos;C. Sampaio
目的
通过水热循环 (TC) 前后不同临时修复材料的相对半透明度参数 (RTP) 来评估表面粗糙度 (SR)、颜色稳定性 (CS) 和颜色遮蔽。
材料和方法
选择了四种不同的临时材料：丙烯酸树脂、双丙烯酸树脂、聚甲基丙烯酸甲酯 (PMMA) CAD/CAM 块和 3D 打印临时树脂。获得厚度为 0.6 毫米和 1.3 毫米的样品，并在样品进行 6000 次 TC 循环之前和之后测定 SR、CS 和 RTP。使用粗糙度计来评估 SR。在 TC 之前和之后在白色和黑色背景上确定颜色，并通过 RTP 评估颜色掩蔽。 CS 是使用分光光度计根据 CIEDE2000 公式在 TC 之前和之后测定的。
结果
TC 之前和之后的 SR 值范围分别为：1.3 mm 时为 -0.01 至 0.28，0.6 mm 时为 0.00 至 0.38。 1.3 mm 的 CS（ΔE00 值）范围为 0.53 至 4.38，0.6 mm 的 CS（ΔE00 值）范围为 0.70 至 5.66。 3D 打印树脂获得了最高值。最后，对于 RTP 值，TC 前后的差值对于 1.3 mm 而言分别为 -0.036 至 2.66，对于 0.6 mm 为 0.52 至 2.57，其中 PMMA CAD/CAM 块是两种情况下值最低的材料。
结论
不同材料和厚度的SR、CS和RTP值各不相同。 3D打印树脂的整体性能不如其他材料。 PMMA CAD/CAM 模块在测试条件下获得了总体最佳值。
AIM
To evaluate surface roughness (SR), color stability (CS), and color masking as assessed through the relative translucency parameter (RTP) of different provisional restoration materials before and after water thermocycling (TC).
MATERIALS AND METHODS
Four different provisional materialas were selected: acrylic resin, bis-acryl resin, polymethyl methacrylate (PMMA) CAD/CAM blocks, and 3D-printed provisional resin. Samples of 0.6- and 1.3-mm thickness were obtained, and SR, CS, and RTP were determined before and after the samples were submitted to 6000 cycles of TC. A rugosimeter was used to assess SR. Color was determined on white and black backgrounds before and after TC, and color masking was assessed through RTP. CS was determined using a spectrophotometer with the CIEDE2000 formula, before and after TC.
RESULTS
SR values before and after TC ranged from -0.01 to 0.28 for 1.3 mm, and from 0.00 to 0.38 for 0.6 mm, respectively. CS (ΔE00 values) ranged from 0.53 to 4.38 for 1.3 mm, and from 0.70 to 5.66 for 0.6 mm, respectively. The highest value was obtained for 3D-printed resin. Finally, for RTP values, the difference before and after TC ranged from -0.036 to 2.66 for 1.3 mm, and from 0.52 to 2.57 for 0.6 mm, respectively, with the PMMA CAD/CAM block being the material with the lowest values in both cases.
CONCLUSION
Values of SR, CS, and RTP varied among different materials and thicknesses. The overall performance of 3D-printed resin was inferior to ?that of the other materials. The PMMA CAD/CAM block obtained the overall best values for the conditions tested.