う蝕の罹患状況で変わるう蝕指標の役割

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Recently, occurrences of dental caries have decreased dramatically. We studied the role of two parameters to establish the goals of dental health service and assess its activities properly. By using dental caries records of 53,417 of elementary school children and junior high school students in Yonezawa City, Yamagata Prefecture from 1997 to 2002, we concluded the following : 1. There were significant correlations observed between the rate at the beginning of the observation and the decrease of the rate for 5 years in the change of the DMFT index, but insignificant correlations in the change of the individual DMF rate. 2. There was a marked correlation logarithmic curve Y=26.7 log_e X+43.9 between the individual DMF rate (Y) and the DMFT index (X). There was a steep increase between 1 and 3 on the 3-point scale, thereafter a gradual increase. 3. The shifts of the group from DMFT index 5 to DMFT index 4, from DMFT index 4 to DMFT index 3, and from DMFT index 3 to DMFT index 2 were successful when the number of the pupils with a lot of caries decreased and the number of the pupils with a few decayed teeth or non-decayed teeth increased. But the shift of the group from DMFT index 2 to DMFT index 1 was successful when the number of each cluster decreased and the number of the pupils with non-decayed teeth drastically increased. From these results, the individual DMF rate would be seen to show a bigger change and a more sensitive response than the DMFT index in cases with a DMFT index of around 2. In the situation of the low incidence of caries, the main purpose of dental health service is to increase the number of pupils with non-decayed teeth. Therefore, using the individual DMF rate to describe the current situation of dental health service and its goals would make its activities and course clearer.
奥羽大学の論文
2004-03-31

う蝕の罹患状況で変わるう蝕指標の役割

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