Short-term observation of gold-plating unprecious metal ceramic crown in restoring anterior tooth]

To evaluate the short-term effect of gold-plating technique used in Ni-Cr metal ceramic crown in restoring anterior teeth.64 teeth from 38 cases were divided into two groups. Each group consisted of 32 teeth. All the teeth were restored with Ni-Cr metal ceramic crown. The restorations in group 1 had no treatment while those in group 2 were treated with gold-plating technique in the base metal alloy.Gingiva discoloration, bleeding on probing (BOP), plaque index (PLI) and sulcular bleeding index (SBI) were examined 1 and 12 months after restoration. Chi-square test and Wilcoxon rank sum test were used for statistical analysis.Gingiva discoloration was found in both groups after bonding. According to the percentage of gingival discoloration, there was no significant difference between group 1 and group 2 (12.5% vs 28.1%) (P>0.05). However, 12 months later, significant difference was found between the two groups (15.6% vs 37.5%)(P<0.05). According to PLI, BOP and SBI, there was no statistical difference between two groups (P>0.05).Gold-plating was a good method in solving the problem of gingival discoloration in unprecious metal ceramic crown.