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Journal of Dental Research
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Evaluation of Mutagenicity of Restorative Dental Materials Using the Ames Salmonella/Microsome Test

Y. Li

Indiana University School of Dentistry, 415 Lansing Street, Indianapolis, Indiana 46202

T.W. Noblitt

Indiana University School of Dentistry, 415 Lansing Street, Indianapolis, Indiana 46202

A.J. Dunipace

Indiana University School of Dentistry, 415 Lansing Street, Indianapolis, Indiana 46202

G.K. Stookey

Indiana University School of Dentistry, 415 Lansing Street, Indianapolis, Indiana 46202

Compounds of five commercially available dental material kits were examined for mutagenic potential by use of the Ames Salmonella/microsome test. Dimethyl sulfoxide (DMSO) was used as the solvent for all materials, except MONO-LOK2 Primer and Right-On Activator, which were dissolved in 95% ethanol. The Tenure, Fuji, and Gluma materials were initially screened at 2 mg (solids) or 2 µL (liquids) per plate, without S9 (Aroclor 1254-induced rat liver microsomes), and dose-response studies were conducted for those materials showing potential mutagenicity. The components of three dental kits, MONO-LOK2, Right-On, and Gluma, were further examined, both with and without S9 activation, at doses of 0.2, 4, 20, 100, 500, and 2500 µg (nL for liquid components) per plate. The data showed no mutagenic potential for the components of Fuji Glass Ionomer (Type III), Tenure Dentin Bonding System, and MONO-LOK2 kits, or Right-On Paste. However, Gluma 3, a component of the Gluma/Lumifor Bonding System, exhibited mutagenic activity in a dose-response manner. The mutagenicity of Gluma 3 was demonstrated in repeated experiments. Gluma 4 and the resin of the Gluma dental kit, as well as Right-On Activator, caused a slight increase in the number of revertants, and judgment regarding their mutagenicity could not be made conclusively. The results of this study indicate that some commercial dental materials may not have been adequately tested for mutagenicity, and that a reliable test program for evaluation of mutagenicity of dental materials is needed so that their safe use in dental practice can be ensured.

Journal of Dental Research, Vol. 69, No. 5, 1188-1192 (1990)
DOI: 10.1177/00220345900690051301
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