J Korean Acad Prosthodont.  2009 Jul;47(3):348-355.

Comparison on accuracy of porcelain color reproducibility using two colorimeters

• Lee TI
• Ahn JS
• Kim YS
• Shin SW

Abstract

STATEMENT OF PROBLEM: Although the use of colorimeter to improve the accuracy of tooth color measurement has increased, it is real situation that there is almost no comparative study about the accuracy among various colorimeters. PURPOSE: The purpose of this study is to compare the accuracy of porcelain color reproducibility using ShadeEye-Ncc dental chroma meter (Shofu Inc., Kyoto, Japan) and Shadepilot(TM) system (Degudent Inc., Hanau, Germany). MATERIAL AND METHODS: Color of 2M2 and 3M2 shade tap of Vitapan 3D Master shade guide were measured using the above two colorimeters. Porcelain specimens were fabricated through this data. The porcelain systems used were Vintage Halo Porcelain system with ShadeEye-Ncc dental chroma meter, and VitaOmega900 Porcelain system with Shadepilot(TM) system. Colors of shade tap models and porcelain specimen were measured with spectrophotometer, and calculated delta E based on the results. RESULTS: The following results were obtained. 1. Shadepilot(TM) system showed more suitable porcelain color reproducibility compared to ShadeEye-Ncc dental chroma meter (P < .05). 2. The result showed the difference of porcelain color reproducibility according to shade of Shade tap which is model. More suitable porcelain color reproducibility was shown at 3M2 shade tap than at 2M2 shade tap (P < .05). 3. The average of DeltaE* of porcelain specimens which was made by the two colorimeters was 4.44-6.14, so the difference of shade was shown through the naked eye. CONCLUSION: Shadepilottrade mark system showed more suitable porcelain color reproducibility. When using ShadeEye-Ncc dental chromameter, it will be necessary to improve accuracy through coloring various parts of the whole tooth.

Keyword

colorimeter; ShadeEye-Ncc dental chroma meter; Shadepilot(TM) system; porcelain color reproducibility; spectrophotometer

MeSH Terms

Dental Porcelain
Eye
Tooth
Dental Porcelain

Figure

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  Fig. 1. Color measurement data by Shadepilot of 2M2.

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  Fig. 2. Color measurement data by Shadepilot of 3M2.

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  Fig. 3. Porcelain specimens.

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  Fig. 4. ΔE Mean & Std. Deviation graph.

Reference

1.Clark EB. An Analysis of Tooth Color. J Am Dent Ass. 1931. 18:2093–103.

2.Clark EB. Tooth Color Selection. J Am Dent Ass. 1933. 20:1065–73.

3.Paravina RD., Powers JM., Fay RM. Color comparison of two shade guides. Int J Prosthodont. 2002. 15:73–8.

4.Sproull RC. Color matching in dentistry. II. Practical applications of the organization of color. J Prosthet Dent. 1973. 29:556–66.

5.Grajower R., Revah A., Sorin S. Reflectance spectra of natural and acrylic resin teeth. J Prosthet Dent. 1976. 36:570–9.

6.Cernavin I. Effects of chlorine-containing disinfecting compounds on shade guides made of acrylic resin. J Prosthet Dent. 1996. 75:574.

7.Sykora O. Fabrication of a posterior shade guide for removable partial dentures. J Prosthet Dent. 1983. 50:287–8.

8.Macentee M., Lakowski R. Instrumental colour measurement of vital and extracted human teeth. J Oral Rehabil. 1981. 8:203–8.

9.Goodkind RJ., Schwabacher WB. Use of a fiber-optic col-orimeter for in vivo color measurements of 2830 anterior teeth. J Prosthet Dent. 1987. 58:535–42.

10.Kim LK., Cho IH., Shin SY. The Reproducibility of various porcelain color selection systems using spectrophotometry. J Korean Acad Prosthodont. 2004. 42:544–55.

11.Paul S., Peter A., Pietrobon N., Ha ¨mmerle CH. Visual and spectrophotometric shade analysis of human teeth. J Dent Res. 2002. 81:578–82.

12.Sung CR., Cho IH., Lee JH. Shade analysis of artificial teeth using shade scan system. J Korean Acad Prosthodont. 2004. 42:443–57.

13.McPhee ER. Light and color in dentistry. Part I—Nature and perception. J Mich Dent Assoc. 1978. 60:565–72.

14.Goodkind RJ., Keenan KM., Schwabacher WB. A comparison of Chromascan and spectrophotometric color measurements of 100 natural teeth. J Prosthet Dent. 1985. 53:105–9.

15.Jorgenson MW., Goodkind RJ. Spectrophotometric study of five porcelain shades relative to the dimensions of color, porcelain thickness, and repeated firings. J Prosthet Dent. 1979. 42:96–105.

16.Seghi RR., Johnston WM., O'Brien WJ. Spectrophotometric analysis of color differences between porcelain systems. J Prosthet Dent. 1986. 56:35–40.

17.Esquivel JF., Chai J., Wozniak WT. Color stability of low-fusing porcelains for titanium. Int J Prosthodont. 1995. 8:479–85.

18.Seghi RR., Hewlett ER., Kim J. Visual and instrumental colorimetric assessments of small color differences on translucent dental porcelain. J Dent Res. 1989. 68:1760–4.

19.Gross MD., Moser JB. A colorimetric study of coffee and tea staining of four composite resins. J Oral Rehabil. 1977. 4:311–22.

20.Barrett AA., Grimaudo NJ., Anusavice KJ., Yang MC. Influence of tab and disk design on shade matching of dental porcelain. J Prosthet Dent. 2002. 88:591–7.

21.Dozic 、A., Kleverlaan CJ., Meegdes M., van der Zel J., Feilzer AJ. The influence of porcelain layer thickness on the final shade of ceramic restorations. J Prosthet Dent. 2003. 90:563–70.

22.Chu SJ. Color. In: Gurel G (ed). The Science and Art of Porcelain Laminate Veneers. Chicago: Quintessence;2003. p. 158–206.

23.Preston JD. Current status of shade selection and color matching. Quintessence Int. 1985. 16:47–58.

24.Wang X., Ge J., Fay RM., Lu H., Gao C., Powers JM. Comparison of the color of ceramics as measured by different spectrophotometers and colorimeters. Int J Prosthodont. 2005. 18:73–4.

25.Kourtis SG., Tripodakis AP., Doukoudakis AA. Spectrophotometric evaluation of the optical influence of different metal alloys and porcelains in the metal-ceramic complex. J Prosthet Dent. 2004. 92:477–85.

26.Cho MS., Lee YK., Lim BS., Lim YJ. Changes in optical properties of enamel porcelain after repeated external staining. J Prosthet Dent. 2006. 95:437–43.

27.Park JH., Lee YK., Lim BS. Influence of illuminants on the color distribution of shade guides. J Prosthet Dent. 2006. 96:402–11.

28.Douglas RD., Brewer JD. Variability of porcelain color reproduction by commercial laboratories. J Prosthet Dent. 2003. 90:339–46.

29.Ishikawa-Nagai S., Sawafuji F., Tsuchitoi H., Sato RR., Ishibashi K. Using a computer color-matching system in color reproduction of porcelain restorations. Part 2: Color reproduction of stratiform-layered porcelain samples. Int J Prosthodont. 1993. 6:522–7.

30.Paul SJ., Peter A., Rodoni L., Pietrobon N. Conventional visual vs spectrophotometric shade taking for porcelain-fused-to-metal crowns: a clinical comparison. Int J Periodontics Restorative Dent. 2004. 24:222–31.