目测法与电子比色仪比色在临床烤瓷修复中的对比研究

Comparison of visual colorimeter with electronic colorimeter in repair of porcelain crown

目的:对比Easy shade Compact电子比色仪和目测法的比色效果,探讨电子比色仪应用于金属烤瓷修复中的可行性。方法:使用Vita3D-Master比色板和Easyshade Compact电子比色仪为40例患者的对侧上中切牙颈1/3中1/3切1/3进行视觉和仪器选色。在CIE1976L*a*b*色度系统下,用单反数码相机(CanonD50)对两种比色方法制作的烤瓷冠与对应的天然牙进行色度值测定和分析。结果:仪器组△E*与目测组△E*的差异有统计学意义(P<0.05),仪器组△E*相比目测组更接近于天然牙;两种比色方法的△C*和△H*差异没有统计学意义(P>0.05);△L*差异有统计学意义;患者对两组烤瓷冠色彩还原效果的满意度差异无统计学意义。结论:Easyshade Compact电子比色仪比色效果优于目测法,不失为一种比较好的辅助临床医生的比色工具。

Objective To study the feasibility of clinical application of the electronic colorimeter,and compare its clinical effect with visual colorimeter.Method The 40 patients with contralateral upper incisor in cervical,middle and incisal positions was tested using Vita3D-Master shade guide and electronic colorimeter.Porcelain crown made of two kinds of colorimeter and corresponding natural teeth were analyzed by digital cameras on CIE L a b color system.Results There was significant difference between the △E of electronic colorimeter and the △E of the visual colorimeter（P〈 0.05）.The lightness difference △L of these two colorimeteries had statistics significance（P〈 0.05）,while the chroma difference porcelain △C and △H did not have.Patients of the two groups with porcelain crown to restore the effect of color had no significant difference in satisfaction.Conclusion The clinical effect of electronic colorimeter is better than visual colorimeter and is a good supplementary tool for the clinician.