三种基底冠对牙龈缘组织影响的临床比较

目的:观察比较非贵金属(镍铬合金)、贵金属(钯银合金)和全瓷(二氧化锆全瓷)内冠三种基底烤瓷冠对牙龈组织的影响。方法:选取3种基底烤瓷冠各40例从牙龈充血和色素沉着等方面进行统计学分析。结果:镍铬合金为基底烤瓷冠修复后出现牙龈异常或龈缘色素沉着15例,钯银合金为基底烤瓷冠修复后出现牙龈异常或龈缘色素沉着2例,全瓷(二氧化锆全瓷)内冠为基底烤瓷冠修复后无1例出现牙龈异常或龈缘色素沉着。结论:贵金属基底烤瓷冠和全瓷烤瓷内冠具有良好的生物相容性,不容易造成牙龈炎及过敏反应,对牙龈无不良影响,减少了龈缘色素沉着的发生,而镍铬合金为基底烤瓷冠可引起龈缘组织异常反应。

Clinical comparoson of three different kinds of ceramic crowns on marginal gingivae

Objective To compare the impact of complete crowns made by three different materials on the gingival health and pigmentation.Methods Forty patients were selected randomly and divided into three groups:metal-ceramic crowns of Ni-Cr alloy;metal-ceramic crowns of Pd-Ag alloy;and zirconia all-ceramic crowns.After1,2 and 3 years follow up,the marginal gingival bleeding index and pigmentation were examined.The data were analyzed by SPSS 13.0 software.Results Givngival inflammation or pigmentation was observed in 15 cases of Ni-Cr group.Two cases of Pd-Ag alloy metal-ceramic crowns with discolored gingivae were observed.No gingival inflammation or pigmentation was observed in zirconia all-ceramic group.Conclusion The metal-ceramic crowns of Pd-Ag alloy and zirconia all-ceramic crowns showed good biocompatibility.There were no adverse effects of all-ceramic crowns on gingival health.The Pd-Ag alloy metal ceramic crowns would not cause obvious harm to the marginal gingival,while the Ni-Cr alloy metal ceramic crowns may increase the risk of gingival bleeding and pigmentation.