Repeatability of a specially designed intraoral colorimeter

Gary R. Goldstein, George W. Schmitt

Research output: Contribution to journalArticlepeer-review


A specially modified Minolta CS-100 colorimeter with a DP-101 data processor was designed for intraoral use. To test the repeatability of the results obtained with this specially modified unit, five porcelain and five acrylic resin denture teeth were mounted in a fixed position in front of a fixed mounted meter. Three L*a*b* readings were taken per tooth and mean values were obtained after calibration as a baseline measurement. The readings were repeated on day 3 without recalibration and on day 8 after recalibration. The same-day repeatability showed ΔE values <0.4 in nine of the 10 samples. The day 3 repeatability showed ΔE values <0.4 in only 2 of the 10 samples. The day 8 results, after recalibration, showed ΔE values >0.4 in all of the samples, with a range of 0.57 to 2.75. In vivo testing was performed on five patients with ΔE values that ranged from 1.1 to 32.1.

Original languageEnglish (US)
Pages (from-to)616-619
Number of pages4
JournalThe Journal of Prosthetic Dentistry
Issue number6
StatePublished - Jun 1993

ASJC Scopus subject areas

  • Oral Surgery


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