Epidemiological Study of Periodontal Disease

采用社区牙周治疗需求指数（CPITN）评估东京两家银行822名员工的牙周状况和治疗需求。分析结果表明，90%以上的受试者患有不同程度的牙周病。对仙台市1195名12 ~ 17岁女大学生牙周健康状况进行了调查。85%的受试者患有某种牙周病，需要接受牙周治疗（TN <I> - <II>）。因此，人们认识到，爱知县工业工人的牙周病可以通过较年轻年龄组的口腔卫生指导和洗牙来控制，并通过30岁以上年龄组的专业和个人护理相结合来控制。在长崎县的小岛屿之一的肠岛，调查口腔状态。结果表明：江岛中上年龄段居民平均缺牙数随年龄增长迅速增加，远高于日本人口的平均值；结果对新泻牙科医院972名门诊病人进行了牙科x光检查。骨破坏随年龄增长而增加。山梨良条精神变态患者的牙周病程度高于精神正常成人。这表明控制斑块的动机将有助于精神病的治疗。

The Community Periodontal Index of Treatment Needs (CPITN) was examined to assess the periodontal status and treatment needs in the 822 employees of two banks in Tokyo. The analyzed information indicated that over 90 percent of subjects suffered from periodontal diseases in various degrees.Periodontal status of 1195 female students of Sendai city aged between 12 and 17 was investgated. 85 percent of the subjects had some kinds of periodontal diseases and were required toaccept periodontal treatment(TN <I> - <II> ).As a result, it is recognized that the periodontal disease in indastrial workers of Aichi Prefecture may be controled by oral hygiene instruction and scaling in younger age groups and by a combination of professional and personal care in age groups above 30.In Enoshima, one of small islands in Nagasaki Prefecture, to investigate the oral state. The results were as follows: The average number of missing teeth in middle and upper age bracket in inhabitants in Enoshima increased rapidly with age and was much higher than the mean value of the Japanese.As a result by dental radiographs on 972 outpatients of Niigata Dental Hospital. bone destruction increased with increusing age.In psychopathic patients of Yamanashi Ryoyojo, the degree of periodontal disease were higher than mentally normal adults. It sugest that the motivation to plaque control will be useful to treatment of psychopathy.