- Visibility 54 Views
- Downloads 53 Downloads
“Shade selection: spectrophotometer vs digital camera – a comparative in-vitro study”
- Author Details:
-
Dhruv Anand
-
Surendra Kumar G.P
-
Devanshi Yadav Anand
-
Manoj Kumar Sundar
-
Rahul Sharma
-
Amit Gaurav
Shade determination may be precisely performed with spectrophotometers, however this technique is time consuming and requires special devices. The aim of this study was to ascertain if digitally acquired images with an SLR camera can be used as an alternative to the VITA easyshade spectrophotometer for obtaining the shade of the teeth. Twenty extracted anterior tooth samples were analysed to determine the L*, a*, b* values with a spectrophotometer. The same samples were imaged with a digital camera, and same colour parameters were determined on the digital images with a software. Statistical analysis was performed using pearson coefficient of correlation. It was observed that the L* and b* values obtained by both the methods were highly significant (r?0.7, p?0.05) with r = 0.798 (p=0), r = 0.858 (p=0) whereas ‘a’ value was not significant with r=0.246 (p=0.377). It can be concluded that an SLR camera with Adobe photoshop CS5.1 as an adjunct can be used as an alternative to spectrophotometer in obtaining ‘l’ and ‘b’ values accurately.
Keywords: Digital analysis, Spectrophotometric analysis, Colour analysis, Cielab
References
- E. Cal, P. Guneri, T. Kose. Comparison of digital and spectrophotometric measurements of colour shade guides. Journal of Oral Rehabilitation 2006;33:221-228.
- Preston JD. Current status of shade selection and colour matching. Quintessence Int. 1985;1:47–58.
- Russell MD, Gulfraz M, Moss BW. In vivo measurement of colour changes in natural teeth. J Oral Rehabil. 2000;27:786–792.
- Paravina RD, Powers JM, Fay RM. Colour comparison of two shade guides. Int J Prosthodont. 2002;15:73–78.
- Johnston WM, Kao EC. Assessment of appearance match by visual observation and clinical colourimetry. J Dent Res. 1989;68:819–822.
- Bentley C, Leonard RH, Nelson CF, Bentley SA. Quantitation of vital bleaching by computer analysis of photographic images. J Am Dent Assoc. 1999;130:809-
- Seghi RR, Hewlett ER, Kim J. Visual and instrumental colourimetric assessments of small colour differences on translucent dental porcelain. J Dent Res. 1989;68:1760-
- Van der Burgt TP, ten Bosch JJ, Borsboom PCF, Plasschaert AJM. A new method for matching tooth colours with colour standards. J Dent Res. 1985;64:837–
- Seluk LW, La Lande TD. Aesthetics and communication with a custom shade guide. Dent Clin North Am. 1985;29:741–751.
- Okubo SR, Kanawati A, Richards MW, Childress S. Evaluation of visual and instrument shade matching. J Prosthet Dent. 1998;80:642–648.
- Horn DJ, Bulan-Brady J, Hicks ML. Sphere spectrophotometer versus human evaluation of tooth shade. J Endod. 1998;24:786–790
- Paul S, Peter A, Pietrobon N, Hammerle CH. Visual and spectrophotometric shade analysis of human teeth. J Dent Res. 2002;81:578–582.
- Uchida H, Vaidyanathan J, Viswanadhan T, Vaidyanathan TK. Colour stability of dental composites as a function of shade. J Prosthet Dent. 1998;79:372–377.
- Lee YK, Yoon TH, Lim BS, Kim CW, Powers JM. Effects of colour measuring mode and light source on the colour of shade guides. J Oral Rehabil. 2002;29:1099–1107.
- Wozniak WT. How to improve shade matching in the dental operatory. J Am Dent Assoc. 1981;102:209–210.
- Gurdal P, Hildebolt CF, Akdeniz BG. The effects of different image file formats and image-analysis software programs on dental radiometric digital evaluations- Technical Report. Dentomaxillofac Radiol. 2001;30:50–
- Yap AU, Sim CP, Loh WL, Teo JH. Human-eye versus computerized colour matching. Oper Dent. 1999;24:358–
- Knispel G. Factors affecting the process of colour matching restorative materials to natural teeth. Quintessence Int.1991;22:525–531.
- Pasquale Loiacono, Luca Pascoletti. Photography in dentistry. Theory and Techniques in Modern Documentation.
- Lee JJ, Nettey-Marbell A, Cook A Jr, Pimenta LA, Leonard R, Ritter AV.
- Using extracted teeth for research: the effect of storage medium and sterilization on dentin bond strengths. J Am Dent Assoc. 2007 Dec;138(12):1599-603.
How to Cite This Article
Vancouver
Anand D, G.P SK, Anand DY, Sundar MK, Sharma R, Gaurav A. “Shade selection: spectrophotometer vs digital camera – a comparative in-vitro study” [Internet]. IP Ann Prosthodont Restor Dent. 2016 [cited 2025 Oct 18];2(3):73-78. Available from: https://doi.org/
APA
Anand, D., G.P, S. K., Anand, D. Y., Sundar, M. K., Sharma, R., Gaurav, A. (2016). “Shade selection: spectrophotometer vs digital camera – a comparative in-vitro study”. IP Ann Prosthodont Restor Dent, 2(3), 73-78. https://doi.org/
MLA
Anand, Dhruv, G.P, Surendra Kumar, Anand, Devanshi Yadav, Sundar, Manoj Kumar, Sharma, Rahul, Gaurav, Amit. "“Shade selection: spectrophotometer vs digital camera – a comparative in-vitro study”." IP Ann Prosthodont Restor Dent, vol. 2, no. 3, 2016, pp. 73-78. https://doi.org/
Chicago
Anand, D., G.P, S. K., Anand, D. Y., Sundar, M. K., Sharma, R., Gaurav, A.. "“Shade selection: spectrophotometer vs digital camera – a comparative in-vitro study”." IP Ann Prosthodont Restor Dent 2, no. 3 (2016): 73-78. https://doi.org/