Influences of diagnostic reversals of dental caries, occuring in usual dental examination for school children, on the evaluation of the dental health program.

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In order to estimate the influence of diagnostic reversals on the evaluation of dental health program, we investigated the data from 9276 school children's first molars, which had been examined annually by school dentists. The results were as follows:<BR>1. A high rate of diagnostic reversals were found in the lower school grades. The rate of the reversal decreased in the higher grades.<BR>The upper first molars showed a higher rate of reversal than the lower first molars.<BR>2. Almost all of the diagnostic reversals were from the first degree of dental caries. The rate of the reversal from the first degree of dental caries of upper first molar was about 40.9-47.7% in the lower school grades and about 20% in the higher grades. The reverse rate of lower first molar was about 20% in the lower school grades and about 10% in the higher grades. The rate of the reversal from the second degree of dental caries was about 20% for the upperand 10% for the lower first molar, and there were no differences between the lower and higher school grades.<BR>3. There was no influences of diagnostic reversals on the evaluation of the dental health program when we used the decayed teeth having more than the second degree of dental caries. But we found some influence of diagnostic reversals on the dental health program when weused the first degree of dental caries and above.
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