Abstract
This study was carried out to investigate epidemiological survey of periodontal disease of the middle and old age people in Fukuoka Region. 107 subjects who took a medical health examination were divided to three groups, according to the age (40-49, 50-59, 60-69). The clinical survey including the number of remaining teeth, modified-Periodontal Disease Index (m-P.D.I.), Gingival Bleeding Index (G.B.I.) and the condition of the calculus deposition, was carried out. Furthermore, it was investigated the effect of oral hygiene training.
The results obtained were as follows.
1. The average number of remaining teeth and the ratio of the persons with dental calculus were decreased as increasing of age.
2. The average index of m. P.D.I. and the number of the persons who represent deep periodontal pockets were increased as increasing of age.
3. The increasing ratio of the persons to be required the complex treatment including the periodontal surgery were observed as increasing of age.
4. In 50-59 age group, the score of the G.B.I. was significantly lower than those of the other groups. 5. About a quarter of the subjects have been instructed in oral hygiene technique in the past, but these experience brought no significant differences in the average of the m-P.D.I. and the G.B.I..
