Nitin HC¹, K Chandrasekharan Nair²* and Jayakar Shetty³

¹Specialist Prosthodontist, Wassan Speciality Dental Center, Muscat, Sultanate of Oman, India
²Professor Emeritus, Department of Prosthodontics, Sri Sankara Dental College, Akathu¬muri, Thiruvananthapuram, Kerala, India
³Former Professor, Dept. of Prosthodontics, AECS Maaruti College of Dental Sciences, Bangalore, India

*Corresponding Author: K Chandrasekharan Nair, Professor Emeritus, Department of Prosthodontics, Sri Sankara Dental College, Akathu¬muri, Thiruvananthapuram, Kerala, India.

Received: November 02, 2022; Published: November 16, 2022

Abstract

Introduction: The present study was conducted to find out the effect of different light sources viz., sunlight, incandescent light, halogen light, tube light and colour corrected light on shade selection. The effect of gazing at blue and grey cards and usage of Vitapan Classic and Vitapan 3D master shade guides.

Materials and Methods: Two shade tabs were selected from Vitapan Classic and Vitapan 3D Master (Vita Zahnfabrik, Germany) shade guides. Matching to the selected tabs, a feldspathic and a pressable ceramic disc was fabricated. Shade selection was done under five different light sources. The shade matching procedure was repeated after a few days by the volunteers after gazing at a blue coloured card for ten seconds and again after a few days after gazing at a neutral grey coloured card for ten seconds. The shades selected were recorded in a proforma. The entire shade matching procedure was repeated again for a second time.

Results: The light source was found to be a significant factor in influencing the correct identification of shade (P<0.001). Use of coloured cards improved the shade matching when compared to the non-usage of cards (P<0.001). The Vitapan 3D Master has higher odds/chances of correctly identifying the right shade, when compared to Vitapan Classical shade guide (P<0.05).

Conclusion:

1. Sunlight is superior to other light sources. But when artificial lights have to be used, a color corrected light or the light from the dental chair (halogen light) can be used to obtain better shade matches.
2. Gazing at neutral grey and blue card is an effective adjunct in improving the quality of shade selection.
3. The Vitapan 3D Master shade guide was a better shade matching tool than Vitapan Classical shade guide.

Keywords:Mucocutaneous Disorders; Quality of Life; OHRQoL; MMP; PV; SJS; EM; OHIP-14

References

1. Saleski CG. “Colour, light and shade matching”. Journal of Prosthetic Dentistry 27 (1972): 263-268.
2. Pascual Moscardó A and Camps Alemany I. “Chromatic appreciation in the clinic and the laboratory”. Medicina Oral, Patologia Oral y Cirugia Bucal 11 (2006): E363-E368.
3. Jouhar R., et al. “An Overview of Shade Selection in Clinical Dentistry”. Applied Sciences 12 (2022): 6841.
4. Barna GJ., et al. “The influence of selected light intensities on colour perception within the colour range of natural teeth”. Journal of Prosthetic Dentistry 46 (1981): 450-453.
5. Paravina RD., et al. “Color comparison of two shade guides”. The International Journal of Prosthodontics 15 (2002): 73-78.
6. Ragain JC. “A review of colour science in dentistry: shade matching in contemporary dental practice”. Journal of Dental Health, Oral Disorders and Therapy 4 (2016): 1-5.
7. Wozniak WT and Moser JB. “How to improve shade matching in the dental operatory. Council on dental materials, instruments and equipment”. JADA 102 (1981): 209-210.
8. Hammad IA. “Intrarater repeatability of shade selections with two shade guides”. Journal of Prosthetic Dentistry 89 (2003): 50-53.
9. Dagg H., et al. “The influence of some different factors on the accuracy of shade selection”. Journal of Oral Rehabilitation 31 (2004): 900-904.
10. Curd FM., et al. “Comparison of the shade matching ability of dental students using two light sources”. Journal of Prosthetic Dentistry 96 (2006): 391-396.
11. Gokce HS., et al. “Shade matching performance of normal and color vision-deficient dental professionals with standard daylight and tungsten illuminants”. Journal of Prosthetic Dentistry 103 (2010): 139-147.
12. Yılmaz B., et al. “Effects of shade tab arrangement on the repeatability and accuracy of shade selection”. Journal of Prosthetic Dentistry 105 (2011): 383-386.
13. Paravina RD. “Evaluation of a newly developed visual shade-matching apparatus”. The International Journal of Prosthodontics 15 (2002): 528-534.
14. https://en.wikipedia.org/wiki/Afterimage

Citation

Citation: K Chandrasekharan Nair., et al. “Effect of Illuminants, Colour Cards and Shade Guides on Shade Matching - A Comparative Study".Acta Scientific Dental Sciences 6.12 (2022): 73-85.

Copyright

Copyright: © 2022 K Chandrasekharan Nair., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.