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Journal of Dental Research
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A Model for Producing Caries-like Lesions in Enamel and Dentin Using Oral Bacteria in vitro

B.H. Clarkson

Dows Institute for Dental Research, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242

J.S. Wefel

Dows Institute for Dental Research, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242

I. Miller

Dows Institute for Dental Research, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242

Subsurface enamel lesions and root surface caries-like lesions were consistently produced in vitro using Streptococcus mutans FA1 cultured in thioglycollate broth containing 3.5% w/v dextrose and 2% w/v gelatin. When viewed in polarized light and after imbibition in water, the enamel lesions had a negatively birefringent surface zone and positively birefringent body of the lesion. Those lesions produced after six weeks, after imbibition in quinoline, exhibited a dark zone. The root surface caries-like lesions exhibited a lessradiolucent surface zone above a heavily demineralized body of the lesion. However, no reactionary dentin was seen in the in vitro lesions.

Journal of Dental Research, Vol. 63, No. 10, 1186-1189 (1984)
DOI: 10.1177/00220345840630100201
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