非贵金属烤瓷基底冠表面镀金修复前牙的近期效果观察

目的:观察非贵金属烤瓷基底冠表面镀金处理后修复前牙的临床效果。方法:48例前牙缺损患者(64颗患牙)随机分为2组,每组32颗患牙,分别进行镍铬合金烤瓷冠修复,一组基底冠表面无特殊处理,另一组镀金处理。患者1、12个月后复诊,检查牙龈变色、探诊出血(BOP)及菌斑指数(PLI)、龈沟出血指数(SBI)4个指标。检查结果分别用χ2检验和Wilcoxon秩和检验进行统计学分析。结果:2组修复体黏固后均出现牙龈变色,变色率分别为12.5%与28.2%,χ2检验无显著性差异(P>0.05)。12个月时变色率分别为15.6%与37.5%,两组有显著性差异(P<0.05)。2组修复体PLI、BOP及SBI值差异均较小,无显著性意义(P>0.05)。结论:非贵金属烤瓷基底冠表面镀金处理,对解决龈缘透青现象具有一定的临床意义。

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

PURPOSE: To evaluate the short-term effect of gold-plating technique used in Ni-Cr metal ceramic crown in restoring anterior teeth. METHODS: 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. RESULTS: 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). CONCLUSION: Gold-plating was a good method in solving the problem of gingival discoloration in unprecious metal ceramic crown.