Dental examinations were made on 2,365 adult [male] workers in 3 industries in the State of Utah. It was found that the D.M.F. rate (number of teeth with untreated dental caries, plus filled teeth, plus missing teeth) per 100 men was 1,446 among coal mine workers, 1,485 among metal mine workers, and 1,542 among smelter workers. When the component parts of this rate were considered, it appeared that coal mine workers were most likely to lose teeth once they had become affected, but they had a smaller proportion of decayed teeth (teeth with untreated dental caries plus filled teeth) than either metal mine or smelter workers. The lower D. M. F. rate for all coal mine workers was due to the more favorable experience of this group under 35 years of age. Above this age, workers in the other two industries had about the same D. M. F. rates as coal mine workers. There was a smaller proportion of edentulous persons among coal mine workers 25-34 years of age than among metal mine or smelter workers of the corresponding age groups. Among older persons the position was reversed, and coal mine workers showed the highest proportion of edentulous. Among persons 15-34 years of age there was less gingivitis and it was less severe for coal mine workers than for the other 2 industrial groups. The older age group showed little difference by industry. The incidence of pyorrhea, likewise, was favorable among the younger group of coal mine workers, but not among the older workers. Workers who were found to have a Pb line had a much greater incidence of gingivitis and pyorrhea but lower D. M. F. rates than all workers in these industries. The generally more favorable dental experience of coal mine workers 15-34 years of age may be partially due to the circumstance that they presumably have not been exposed to Pb, while certain metal mine and smelter workers have had Pb exposures.