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Abstract
Purpose
The aim of this study is to investigate the effect of different experience level and different light source on shade selection ability comparing prosthodontist group and dental student group under 4,000 K and 5,500 K light.
Materials and methods
After color difference of Vitapan 3D-master shade guides was measured, 3 sets of 5 shade tabs were selected with similar value but have different chroma (set a, b, c). Also 3 sets of 5 shade tabs were selected with similar chroma but have different values (set d, e, f). Under 4,000 K and 5,500 K light sources, ten prosthodontists and ten dental students were allowed to match in one set of 5 tabs the same shade tab with the tab which was originally selected in the other set of 5 tabs. Color differences of original tab and matched tab were measured by spectrophotometer and the shade selection ability was evaluated with those data. Evaluation of color difference value was performed in regard to different light conditions and different level of experience, followed by t-test with 95% confidence interval.
Results
Color difference values under 4,000 K and 5,500 K light source were 1.62 ± 2.0, and 1.33 ± 1.7 respectively. In addition, color difference values of prosthodontist group and dental student group were 1.34 ± 1.7, and 1.61 ± 2.0 respectively. Difference of shade selection ability was not found under either different light sources (P=.398), or different experience level (P=.221).
Figures and Tables
Fig. 1
Mean color difference (ΔE) value of prosthodontist group and student group under 4,000 K light source. Vertical axis means color difference value; horizontal axis reveals set of selected shade tabs (a, b, c: sets of selected shade tabs with similar value but have different chroma; d, e, f: sets selected shade tabs with similar chroma but have different value).
Fig. 2
Mean color difference (ΔE) value of prosthodontist group and student group under 5,500 K light source. Vertical axis means color difference value; horizontal axis reveals set of selected shade tabs (a, b, c: sets of selected shade tabs with similar value but have different chroma; d, e, f: sets selected shade tabs with similar chroma but have different value).
References
1. Brewer JD, Wee A, Seghi R. Advances in color matching. Dent Clin North Am. 2004. 48:v341–358.
2. Barna GJ, Taylor JW, King GE, Pelleu GB Jr. The influence of selected light intensities on color perception within the color range of natural teeth. J Prosthet Dent. 1981. 46:450–453.
3. Wozniak WT, Moser JB. Council on Dental Materials, Instruments, and Equipment. How to improve shade matching in the dental operatory. J Am Dent Assoc. 1981. 102:209–210.
4. Berns RS, Billmeyer FW, Saltzman M. Billmeyer and Saltzman's principles of color technology. 2000. 3rd ed. New York; Chichester: Wiley.
5. Kim-Pusateri S, Brewer JD, Davis EL, Wee AG. Reliability and accuracy of four dental shade-matching devices. J Prosthet Dent. 2009. 101:193–199.
6. Paul S, Peter A, Pietrobon N, Hämmerle CH. Visual and spectrophotometric shade analysis of human teeth. J Dent Res. 2002. 81:578–582.
7. van der Burgt TP, ten Bosch JJ, Borsboom PC, Kortsmit WJ. A comparison of new and conventional methods for quantification of tooth color. J Prosthet Dent. 1990. 63:155–162.
8. Preston JD. Current status of shade selection and color matching. Quintessence Int. 1985. 16:47–58.
9. Miller L. Organizing color in dentistry. J Am Dent Assoc. 1987. 26E–40E.
10. Lee YK, Yu B, Lim JI, Lim HN. Perceived color shift of a shade guide according to the change of illuminant. J Prosthet Dent. 2011. 105:91–99.
11. CIE 15:2004, CIE Technical Report: Colorimetry, 3rd edition, International Commission on Illumination (Commission Internationale de l'Eclairage). Vienna, Austria: www.cie-usnc.org. ISBN: 3-901-906-33-9.
12. Sproull RC. Color matching in dentistry. II. Practical applications of the organization of color. J Prosthet Dent. 1973. 29:556–566.
13. Hammad IA. Intrarater repeatability of shade selections with two shade guides. J Prosthet Dent. 2003. 89:50–53.
14. Seghi RR, Johnston WM, O'Brien WJ. Spectrophotometric analysis of color differences between porcelain systems. J Prosthet Dent. 1986. 56:35–40.
15. Dozić A, Kleverlaan CJ, El-Zohairy A, Feilzer AJ, Khashayar G. Performance of five commercially available tooth color-measuring devices. J Prosthodont. 2007. 16:93–100.
16. Paravina RD, Powers JM, Fay RM. Color comparison of two shade guides. Int J Prosthodont. 2002. 15:73–78.
17. Ahn JS, Lee YK. Color distribution of a shade guide in the value, chroma, and hue scale. J Prosthet Dent. 2008. 100:18–28.
18. Hassel AJ, Koke U, Schmitter M, Beck J, Rammelsberg P. Clinical effect of different shade guide systems on the tooth shades of ceramic-veneered restorations. Int J Prosthodont. 2005. 18:422–426.
19. Schwabacher WB, Goodkind RJ. Three-dimensional color coordinates of natural teeth compared with three shade guides. J Prosthet Dent. 1990. 64:425–431.
20. O'Brien WJ, Groh CL, Boenke KM. A new, small-color-difference equation for dental shades. J Dent Res. 1990. 69:1762–1764.
21. Barrett AA, Grimaudo NJ, Anusavice KJ, Yang MC. Influence of tab and disk design on shade matching of dental porcelain. J Prosthet Dent. 2002. 88:591–597.
22. Donahue JL, Goodkind RJ, Schwabacher WB, Aeppli DP. Shade color discrimination by men and women. J Prosthet Dent. 1991. 65:699–703.
23. Capa N, Malkondu O, Kazazoglu E, Calikkocaoglu S. Evaluating factors that affect the shade-matching ability of dentists, dental staff members and laypeople. J Am Dent Assoc. 2010. 141:71–76.
24. Gokce HS, Piskin B, Ceyhan D, Gokce SM, Arisan V. Shade matching performance of normal and color vision-deficient dental professionals with standard daylight and tungsten illuminants. J Prosthet Dent. 2010. 103:139–147.
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