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Comparison of two instrumental methods for dental colour selection

D. DUDEA1,* , B. CULIC1, V. PREJMEREAN2, H. COLOSI3, C. ALB1, A. BOTOS1, A. IRIMIE1, M. BĂCIUŢ4

Affiliation

  1. Dept. of Dental Propaedeutics, Faculty of Dentistry, University of Medicine and Pharmacy “Iuliu Haţieganu”, Cluj- Napoca
  2. Faculty of Mathematics and Informatics, University Babeş-Bolyai, Cluj-Napoca
  3. Dept. of Medical Informatics and Biostatistics, Faculty of Medicine, University of Medicine and Pharmacy “Iuliu Haţieganu”, Cluj-Napoca
  4. Dept.of Implantology and Oral Surgery, Faculty of Dentistry, University of Medicine and Pharmacy “Iuliu Haţieganu”, Cluj-Napoca

Abstract

1. To assess the colour parameters recorded by two instrumental methods on extracted teeth 2. To compare the data recorded by the two systems. Experimental: The color parameters CIE L*a*b* were recorded on the buccal surface of 15 extracted teeth, by using: dental spectrophotometry ( Vita Easyshade -Vita®) and digital analysing of the dental image (experimental software- DetColorDent 1.1), before and after accelerated staining in a coffee infusion; the ΔE*was calculated in each case. Statistic analyse was performed using Bland-Altman plots, paired Student’s t-test and Wilcoxon’s signed ranks test. Conclusions: The recorded values of L*, a*, b* are included into the intervals reported by other authors. Decreasing in lightness L* and increasing in redness (a*), as a result of accelerated staining was registered. Consistently lower readings of all colour parameters when using digital image analysis, compared to spectrophotometry were obtained; however, the results indicate no statistic significant difference between ΔE* values recorded by the two methods. The experimental software may be used in order to monitor the variation in the dental shade, but it needs further improvements for the accuracy of CIE L*a*b* values..

Keywords

Spectrophotometer, Colorimeter, CIEL*a*b*, Dental shade.

Citation

D. DUDEA, B. CULIC, V. PREJMEREAN, H. COLOSI, C. ALB, A. BOTOS, A. IRIMIE, M. BĂCIUŢ, Comparison of two instrumental methods for dental colour selection, Optoelectronics and Advanced Materials - Rapid Communications, 4, 1, January 2010, pp.102-109 (2010).

Submitted at: Nov. 26, 2009

Accepted at: Jan. 19, 2010