环境光和邻牙对前牙接触式测色仪测色结果的影响

Influence of ambient light and adjacent tooth in anterior tooth color measurement

目的探讨外源性环境光和邻牙对接触式测色仪测量牙齿颜色结果的影响。方法将10颗离体上颌中切牙固定,MI-150光源从牙齿的唇面(切缘朝下)3点钟和12点钟上方45°入射,入射强度分别为0、50、75、100、125、150W,在有邻牙和无邻牙时分别测量10颗离体中切牙中1/3正中点的CIEL﹡a﹡b﹡值,测量结果采用SPSS11.5软件进行统计分析。结果不同强度和方向的入射光及邻牙存在与否对颜色测量结果均没有明显影响(P>0.05)。结论环境光源和邻牙对接触式测色仪的测色结果没有影响,临床上在牙椅外源辅助灯光下可以采用接触式测色仪直接测色。

Objective To investigate the influence of different intensity and directions of ambient light and adjacent tooth in anterior tooth color measurement by using colorimeter. Methods Fiber lite MI-150 was used as ambient illuminant and it irradiated from three or twelve o＇clock direction through 45° angle above. The light magnitude 0, 50, 75, 100, 125, 150 W were applied in this experiment. The values of CIE L ＊ a ＊ b ＊ were measured by Minoha Chroma meter CR-321 colorimeter on the center labial surface of ten extracted human maxillary central incisors with or without adjacent teeth, then those data were analyzed statistically by using SPSS 11.5. Results Neither different intensities nor different directions of ambient light could influence the results of color measurement by using Minoha Chroma meter CR-321 colorimeter, so did the adjacent teeth whether those were exist or not. Conclusion There is no influence of ambient light and adjacent teeth in the color measurement of anterior teeth under this experiment condition, and Minoha Chroma meter CR-321 colorimeter can be used to measure the color directly aside the chair with light.