| 摘要: |
| 目的 比较不同测色条件下分光光度计测量的准确性,为临床测色提供依据.方法 利用CM-700d分光光度计分别在自然光、白炽灯、暗室测量VITA classical比色板各色片中1/3的色度值L*、a*、b*(L*为明度,a*为红绿轴上的颜色饱和度,b*为黄蓝轴上的颜色饱和度),并计算不同测色条件下的色差值,利用统计软件进行分析.结果 自然光、白炽灯、暗室条件下测量得出的L*、a*、b*值差异均无统计学意义.自然光与白炽灯、自然光与暗室、白炽灯与暗室的色差(ΔE)<1.5的构成比分别为87.50%、100%、93.75%.结论 CM-700d分光光度计的测量准确性高,受外界光源影响很小,暗室测量最为真实地反映比色片的色度值,因此建议在暗室内使用CM-700d分光光度计. |
| 关键词: 义齿 比色板 分光光度计 光源 暗室 |
| DOI：10.3724/SP.J.1008.2015.00100 |
| 投稿时间：2014-08-16修订日期：2014-11-21 |
| 基金项目: |
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| Analysis of VITA shade guide with spectrophotometer under different color measurement conditions |
| SHEN Ya-xian,TANG Wei-zhong* |
(Department of Stomatology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
*Corresponding author) |
| Abstract: |
| Objective To compare the accuracy of spectrophotometer under different color measurement conditions, so as to provide evidence for clinical color measurement. Methods Spectrophotometer was used to obtain the chromatic value L*, a* and b*(L*:Lightness; a*:Saturation on the red and green axile; b*:Saturation on the yellow and blue axile) of all color pieces in the medium 1/3 of vita classical shade guide under the natural light, incandescent lamp and dark room; the values of chromatism were calculated under different color measurement conditions, and the results were fed to statistical software for analysis. Results The L*, a* and b* values were not significantly different under natural light, incandescent lamp and dark room. The composition ratios of ΔE <1.5 NBS for the natural light and incandescent light, natural light and dark room, incandescent lamp and dark room were 87.50%, 100%, and 93.75%, respectively. Conclusion The measurement accuracy of CM-700d spectrophotometer is high and the environment light has slight effect on the accuracy. The chromatism values of shade guide measured in the dark room is the most true ones, so dark room is recommended for CM-700d spectrophotomete. |
| Key words: dentures shade guide spectrophotometer light dark room |
