分光测色计对3D比色板测色的可重复性研究

目的用MINOLTA CM-700d/600d型分光测色计对Vita3D-Master比色板进行颜色测量,研究其对颜色测量的重复性。方法用MINOLTA CM-700d/600d分光测色计对Vita3D-Master比色板各色块的颈部和切部分三次进行颜色测量。第一次测量单独完成,第二、三次于次日完成。第三次测量对每个色块的每个部位的测色都是紧随第二次测量后进行的,并且是在保持第二次测量位置不变的情况下测得的。然后对所测数据进行比较和统计分析。结果分别对第一组和第二组,第一组和第三组,第二组和第三组进行比较,其结果为ΔE均小于人眼最小分辨率1.5NBS。结论MINOLTA CM-700d/600d型分光测色计测色的重复性很好,能满足重复测色的要求。

Repeatability of color measurement of 3D shade guide with spectrophotometer

Objective To examine the repeatability of color measurement of Vita 3D-Master shade guide with MINOLTA CM-700d/600d portable spectrophotometer.Methods The chromatic values of incisal site and cervical site of every piece of the shade guide were measured for three times,the first time it was measured in one day,and the second and third time was respectively measured in the next day. Each measurement of the third time was taken just after the second time before the instrument was moved. All the data were calculated and analysized.Results Compared with each other separately in the three groups,the mean ΔE was smaller than 1.5NBS.Conclusion The repeatability of MINOLTA CM-700d/600d spectrophotometer is very good. And it could satisfy the demands of repeated color measurement.