基底色与黏结剂颜色对CAD/CAM全瓷贴面颜色的影响
Effects of color of abutment and resin cement on color of CAD/CAM all-ceramic veneers

目的 研究黏结剂颜色对CAD/CAM二烯酸锂全瓷贴面颜色的影响。方法 采用Variolink N树脂黏结剂（4种不同颜色）对不同基底色组（ND1~ND7）试件与IPS e.max CAD LTA1 0.7 mm瓷片进行黏结，测量贴面颜色，以2 mm LTA1、LTA2色瓷块颜色为标准色计算色差值（ΔE），采用ANOVA分析及Tukey检验进行多重对比。结果 ΔE值小于临床可接受水平，且两两比较差异无统计学意义的亚组为ND1组的白色、黄色和漂白色亚组（P值分别为0.999、0.969、0.991），ND2组各亚组（组间比较：df=3，F=2.865，P=0.069），ND4组的白色和黄色亚组（P=0.819）；ND5组的白色、透明色和黄色亚组（P值分别为1.000、0.998、1.000），ND6组的透明色、白色和黄色亚组（P值分别为0.487、0.169、0.883）。ND3组仅黄色亚组的ΔE值小于临床可接受水平，且与其他亚组间的差异均有统计学意义（P<0.05）；ND7组各亚组ΔE值均大于临床可接受水平。结论 在限制条件下，采用Veriolink N树脂黏结剂完成黏结后，各贴面的颜色均不够黄，需要黄色调节。漂白色最偏向冷色调，黄色最偏暖色调，白色和透明色介于两者之间。
： Objective To investigate the effect of the color of resin cement on the color of CAD/CAM lithium disilicate ceramic veneers. Methods Different colors (ND1-ND7) of abutment specimens and IPS e.max CAD LTA1 0.7 mm ceramic slices were prepared and cemented by resin cement Variolink N (four different colors). The color of veneers was measured. The color difference (ΔE) between the color of veneers and standard color (2 mm LTA1, LTA2 lithium disilicate ceramic blocks) was calculated. ANOVA analysis and Tukeys HSD test were performed for multiple comparisons. Results ΔE values were smaller than the clinical acceptance level. The differences of the following colors were not statistically significant white, yellow, and bleach XL of the ND1 group (P=0.999, 0.969, and 0.991); colors of the ND2 group (df=3, F=2.865, P=0.069); white and yellow of the ND4 group (P=0.819); white, transparent color, and yellow of the ND5 group (P=1.000, 0.998, 1.000); and transparent color, white, and yellow of the ND6 group (P=0.487,0.169,0.883). For the ND3 group, only ΔE values of the yellow color were smaller than the clinical acceptance level and the differences between the ND3 group and other groups were statistically significant (P<0.05). ΔE values of all colors of the ND7 group were larger than the clinical acceptance level. Conclusion Under limited conditions, the yellow color of veneers is insufficient after cemented by Veriolink N resin cement and the adjustment of yellow color is needed. Bleach XL resin cement will turn the veneer color towards cool color tone and yellow resin cement will turn the veneer color towards warm color tone. The effect of white and transparent resin cement is between that of bleach XL and yellow resin cement