Comparative study on the shade matching performance of dental students under D55 and D65 light sources conditions

doi:10.7518/hxkq.2018.01.013

Abstract

Abstract:

Objective This study aimed to compare the effect of D55 and D65 light sources on the visual colorimetry performance of dental students by using a homemade light-source shelf. Methods Two Vitapan 3D-Master shade guides were randomly selected. One set was used as shade guides. Ten commonly used shade tabs of 2L2.5, 2M2, 2R2.5, 3M2, 3R2.5, 3L1.5, 3R1.5, 3L2.5, 4R1.5, and 4L1.5 were selected from the other set with covered value marks and numbered from 1 to 10. After the colorimetric training, 49 undergraduate dental students were randomly divided into two groups. Each student randomly selected two of the 10 shade tabs, and the colors were subsequently matched under D65 and D55 light sources from a distance of approximately 40 cm. The average color difference (ΔE) between the color selected by each participant and the actual color of shade tabs was calculated. Paired t test was used for statistical analysis. Results The ΔE values between the color selected by each participant and the actual color of the shade tabs under the D55 light source varied from 0 to 6.540. The average value was 2.501. The ΔE values between the color selected by each participant and the actual color of the shade tabs under the D65 light source varied from 0 to 6.610. The average value was 2.530. No statistically significant difference was observed between the results under the two light sources (P=0.921). Conclusion Both D55 and D65 daylight lamps can be used for daily dental colorimetry. These two different color temperatures showed no significant difference.

Key words: shade guide, light source, color temperature, color difference

CLC Number:

R783.2

Yiqing Xiong, Gang Li, Yunhong Lin, Zhiyun Cao, Yanan Wei, Wei Li. Comparative study on the shade matching performance of dental students under D55 and D65 light sources conditions[J]. West China Journal of Stomatology, 2018, 36(1): 66-70.

Figures/Tables 6

Fig 1

Fig 2

Tab 1

Tab 2

Tab 3

Tab 4

References 16

[1]	Gáspárik C, Tofan A, Culic B, et al.Influence of light source and clinical experience on shade matching[J]. Clujul Med, 2014, 87(1):30-33.
[2]	Parameswaran V, Anilkumar S, Lylajam S, et al.Comparison of accuracies of an intraoral spectrophotometer and conven-tional visual method for shade matching using two shade guide systems[J]. J Indian Prosthodont Soc, 2016, 16(4):
	352-358.
[3]	Wee AG, Meyer A, Wu W, et al.Lighting conditions used during visual shade matching in private dental offices[J]. J Prosthet Dent, 2016, 115(4):469-474.
[4]	宋洁文, 姚科, 邱颖宁, 等. 新型LED比色光源下口腔比色板色度值研究[J]. 中华口腔医学研究杂志(电子版), 2014, 8(4):281-285.
	Song JW, Yao K, Qiu YN, et al.Dental shade guide colour values research under a new LED light[J]. Chin J Stomatol Res (Electron Ed), 2014, 8(4):281-285.
[5]	Wang J, Lin J, Gil M, et al.Assessing the accuracy of com-puter color matching with a new dental porcelain shade sys-tem[J]. J Prosthet Dent, 2014, 111(3):247-253.
[6]	Mete JJ, Dange SP, Khalikar AN, et al.Comparative study of shade matching performance of dental students under natural daylight and daylight lamp conditions[J]. Eur J Esthet Dent, 2013, 8(2):192-199.
[7]	辛薇, 陈湘涛, 岳长军, 等. 不同光源下3种比色板色度值的比较[J]. 中国组织工程研究, 2012, 16(3):515-517.
	Xin W, Chen XT, Yue CJ, et al.Chroma value comparison of three kinds of shade guides under different lights[J]. Chin J Tissue Eng Res, 2012, 16(3):515-517.
[8]	陈立. 牙齿美学修复比色[J]. 中国实用口腔科杂志, 2011, 4(8):15-19.
	Chen L.Shade selection in esthetic restoration[J]. Chin J Pract Stomatol, 2011, 4(8):15-19.
[9]	Douglas RD, Steinhauer TJ, Wee AG.Intraoral determina-tion of the tolerance of dentists for perceptibility and accep-tability of shade mismatch[J]. J Prosthet Dent, 2007, 97(4):
	200-208.
[10]	Kuehni RG, Marcus RT.An experiment in visual scaling of small color differences[J]. Color Res Appl, 1979, 4(2):
	83-91.
[11]	Török J, Mauks L, Márton S, et al.Comparative analysis of some factors in tooth color matching[J]. Fogorv Sz, 2014, 107(3):79-86.
[12]	Samra AP, Moro MG, Mazur RF, et al.Performance of dental students in shade matching: impact of training[J]. J Esthet Restor Dent, 2017, 29(2):E24-E32.
[13]	Nakhaei M, Ghanbarzadeh J, Amirinejad S, et al.The in-fluence of dental shade guides and experience on the accu-racy of shade matching[J]. J Contemp Dent Pract, 2016, 17
	(1):22-26.
[14]	Öngül D, Şermet B, Balkaya MC.Visual and instrumental evaluation of color match ability of 2 shade guides on a cera-mic system[J]. J Prosthet Dent, 2012, 108(1):9-14.
[15]	陈英伟, 吴平洋. 背景及色彩培训对比色效果的影响[J]. 临床口腔医学杂志, 2005, 21(5):301-302.
	Chen YW, Wu PY.Effects of different color background and color training in color matching[J]. J Clin Stomatol, 2005, 21(5):301-302.
[16]	包向军, 李幸红, 高卫民, 等. 口腔修复临床比色技术的研究进展[J]. 中国美容医学, 2016, 25(10):117-120.
	Bao XJ, Li XH, Gao WM, et al.The research progress of color match in dental clinic[J]. Chin J Aesthetic Med, 2016, 25(10):117-120.

颜色	L*	a*	b*
2L2.5	73.21	0.63	21.16
2M2	71.27	0.76	17.63
2R2.5	72.70	1.13	21.71
3L1.5	68.00	1.03	18.51
3L2.5	69.59	1.10	22.95
3M2	68.16	2.03	19.51
3R1.5	67.29	2.50	17.46
3R2.5	67.26	2.01	22.63
4L1.5	65.31	1.79	18.27
4R1.5	65.82	3.07	18.76

参数	D55	D65	D55-D65
均数	2.501	2.530	-0.029
标准差	1.688	1.485	0.203
标准误	0.242	0.212	0.030
最小值	0.000	0.000	0.000
最大值	6.540	6.610	-0.070
95%可信区间下限	2.103	2.015	0.088
95%可信区间上限	2.956	2.986	-0.030

光源	正确	不正确	合计	正确率/%
D55	32	66	98	32.7
D65	24	74	98	24.5
合计	56	140	196	28.6

参数	ΔL*	Δa*	Δb*
均数	-0.117	0.163	-0.016
标准差	1.498	0.863	1.639
标准误	0.214	0.123	0.234
P值	0.588	0.193	0.940