2020 Volume 12 Issue 2 Pages 150-157
Purpose: The influence of an anodized titanium custom abutment on the color of highly translucent zirconia used for the superstructure was investigated.
Methods: Using a columnar titanium alloy of 10 mm diameter and 10 mm height, three types of sample, untreated (gray) and anodized (gold and pink) samples, were prepared as experimental groups. For the control group, resin samples were prepared. Highly translucent zirconia of 0.5 mm thickness was used for the samples, and two types of cement paste, those with universal and opaque colors, were used. The paste was inter-positioned between the abutment and zirconia, colorimetric tests (L*, a*, b* values) were performed using a non-contact type dental spectrophotometer, and differences in color (ΔE) on comparison with the control group were calculated.
Results: When the universal and opaque colors were used, the color differences (ΔE) were 11.61 and 5.81, respectively, showing a significant difference between the cements (P < 0.05). In addition, when the pink titanium sample was used, the color difference of the opaque color (ΔE) was 4.21, being the minimum value. On the other hand, the color (hue/chroma) index when using the opaque color, a* value, showed diverse changes, such as −0.66 (tended to be green) when the gold color was used.
Conclusion: These findings suggest that the use of anodized titanium and opaque color cement reduces color changes of highly translucent zirconia. In addition, the variation of a* value suggests the necessity of color adjustment, such as adjustment of stain, because the color of the abutment may influence the color of highly translucent zirconia.
