There is a network of Danshukai in Hida area of Gifu Prefecture. Each Danshukai consists of small number of people and acts on community care for alcoholic. We describe here course and background of accomplishment of the network, and showed its usef ullness. 1) A Danshukai consisting of large number of people had been established in 1970. However, when the number of people who continue Danshu (giving up drinking) increased, the group dynamics was altered to secondary social relation and then beginners and people who did not continue Danshu tended to leave the group. To improve the movements of Danshukai, we have established a type of Danshukai consisting of small number of beginners (referred as small group Danshukai) in 1981. According to a principle that all the attendants have primary social relation to each other, we conducted this community. Since the small group Danshukai was well received by many people, similar type of Danshukai was established one by one without much effort. 2) By using the people left from our hospital as an object, we examined relations between the small group Danshukai and Danshu. It was found that the rate of number of people who continue Danshu and the rate of number of people who belong to Danshukai significantly increased after accomplishment of the network of the small groups of Danshukai. Furthermore, the people living in the place with Danshukai were able to continue Danshu and to belong to Danshukai longer, in comparison with the people living in the place without Danshukai. 3) The main causes that the network was accomplished more easily in Hida area were discussed, regarding characteristics of mental structure in Hida people and the regional trait.
The relationship among the eruption order of the first permanent teeth, craniof acial measurements and caries of the deciduous teeth was examined, in order to investigate the factors relating to the changes in the eruption order of the first permanent teeth from the first permanent molar (M1) to the central permanent incisor (I1). Craniof acial measurement and dental observation were conducted on 462 preschool children. According to their first permanent teeth, the children were divided into two groups, the one contained the children whose first permanent tooth was mandibular Il (I-type children), and the other contained the children whose first permanent tooth was mandibular M1 (M-type children). Eighty-two boys and 67 girls were the I-type children, and 48 boys and 63 girls were the M-type children. The results of craniofacial measurement and dental caries of deciduous teeth were compared between the I-type and M-type children. Statistical analyses were performed by t-test and discriminant analysis. Results were as follows: 1) In both sexes, the mandible of the I-type children was smaller than that of the M-type children. This result suggests that the changes of the eruption order of the first permanent teeth are related to the involution of the mandible in man. 2) Dental caries were more prevailing in the M-type children. The result suggests that the increase of I-type children is related to the recently observed phenomenon of the decreasing dental caries in deciduous teeth. 3) Only in the girls, the I-type children's head-length were shorter than those of the M-type children. 4) As to physical characteristics, the I-type boys were fatter than the M-type boys, and the I-type girls were taller than the M-type girls.