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Journal of Dental Research
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The Detection of Incipient Caries with Tracer Dyes

W.J. O'Brien

University of Michigan, School of Dentistry, Ann Arbor, Michigan 48109-1078

L. Vazquez

University of Michigan, School of Dentistry, Ann Arbor, Michigan 48109-1078

W.M. Johnston

University of Michigan, School of Dentistry, Ann Arbor, Michigan 48109-1078

The purpose of this study was to determine the increase in color contrast produced by the use of a tracer dye in detection of incipient caries lesions with transillumination.

Twenty four caries-free first premolars were immersed in an acid gelatin for production of artificial incipient caries lesions. After the lesions had developed, these teeth were photographed by transillumination. Two photographs were taken of each tooth. The first photograph showed the lesion without dye. A blue tracer dye was then added and absorbed by the lesion, and a second photograph was taken. The data on the color difference were obtained by use of a reflectance colorimeter and showed a four-fold increase between the lesion and surrounding area with the dye. A two-way analysis of variance was used for the statistical interpretation. The color difference between the lesion without the dye and then with the dye was significant. The use of the blue tracer dye, therefore, significantly increased the contrast in the images of the artificial incipient lesions.

Journal of Dental Research, Vol. 68, No. 2, 157-158 (1989)
DOI: 10.1177/00220345890680021101
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