Comparison of colour components between maxillary central incisors - an in vivo study

Abstract

Objectives: The purpose of this study was to determine the relationship of colour in the CIE L a b scale between the maxillary central incisors. Methods: The colour of the maxillary central incisors of 83 patients was measured (in vivo) using a spectrophotometer. Three measurements (6 mm diameter) at the centre of the crown of each of the maxillary central incisors were performed. Results: The total colour difference (?E ab) showed wide variability with the average ?E ab = 1.79. The Wilcoxon Signed Rank Test showed statistically significant differences (p < 0.05) between maxillary right (11) and left central incisors (21) in both the L and b colour components. In the a scale no significant difference was noted. Conclusion: Small colour differences exist between the maxillary central incisors in the same individual when evaluated with a spectrophotometer. Clinical significance: As there is often a difference between the colours of the two central incisors in the same patient, the colour of both the central incisors should be taken into consideration when shade matching anterior teeth.