抄録
In crown restoration using porcelain laminate veneer discolored tooth, the hiding effect of the abutment sample serving as the background was evaluated by varying thickness of masking dentin and changing the cement at the time of adhesion. The conclusions were as follows:
1. When the thickness of masking was varied, the hiding effect was noted on all of the discolored abutment samples having a masking thickness of 0.3 mm or more.
2. When color was measured on two types of cement belonging to the system, the color difference (ΔE*ab) was 4.54 and 5.22 catalyst only and polymer cement respectively, showing a color difference. In particular, the change was higher in b* in both types of cement.
3. When opaque type cement was used even though masking thickness was 0.1 and 0.2 mm, the hiding effect was noted on the severely discolored abutment samples. When opaque type cement having a masking thickness of 0 mm was used, no hiding effect was found on the severely discolored abutment samples.
