Shadepilot全牙比色仪测定牙龈色对比色板色标颜色的影响

The effects of gingival shade guide in visual shade-matching in vitro models

目的:通过体外模拟实验评价牙龈比色板在临床比色中的意义。方法:使用分光光度计型全牙比色仪Shadepilot测量42个比色板色标在4种牙龈比色板(Gumy1,2,3,4)衬托下颈、中、切3部分色彩参数(CIE1976L*a*b*),使用比色仪内置软件计算有无牙龈比色板衬托的色标相同位置的色差值(△E),分析牙龈色对色标颜色的影响。结果:42个色标在4种牙龈色衬托下与无牙龈色衬托的色差值为:颈部(2.93±0.79)NBS,中部(0.51±0.27)NBS,切端(0.61±0.29)NBS;Gumy-1、2、3、4组牙龈色对色标颈、中、切三部分的影响组间差异无显著性(P>0.05)。结论:在模拟测量条件下,牙龈色对比色板色标颈部有影响,肉眼可识别,对色标中部及切端无影响;4种模拟牙龈颜色对比色板色标颜色的影响无统计学差异。

Objective： To evaluate the effects of gingival shade guide in visual shade-matching in vitro models. Methods： 42 tabs of Shofu NCC shade guide were adopted for color measuring. Each tab was fixed in the middle of Gingiva-Indicator, Gumy（ 1,2,3,4） respectively and located in a black box. The measurements were made using the Shadepilot instrument. The color parameters （ CIE1976L＊ a＊ b＊ ） of cervical, body, ineisal area of each tab were recorded. The color difference AE value in the same position of each tab was calculated between non-gingival shade guide group and Gumyl , 2, 3, 4 groups with Shadepilot software. Results： The A E value in the same position of 42 tabs between non-gingival shade guide group and 4 gingival shade guide groups were ： cervical （ 2.93 ± 0.79 ） NBS, body （0.51 ± 0.27 ） NBS and ineisal （ 0.61 ± 0.29 ） NBS. In the cervical, body and incisal area, there was no statistically difference among Gumy1 ,2,3,4 groups on affecting shade of tabs（P 〉0.05）. Conclusion： The gingival color has an effect on the cervical shade of tabs, and it can be recognized by human eyes, while gingival color has little effect on the shade of body and incisal area.