抄録
Our association recommend the member dental offices to record and accumulate clinical information on their patients. For this purpose, last year we started the research business which annually compiles clinical information on new patients at the cooperative dental offices. This year, our second business year, 27 member dental offices participated in and compiled the basic clinical information on their new patients who visited them during January 1 to December 31, 2006. 10,555 patients fitted the survey requirements, compiling DMFT by 10 - 70 age group, DMFT by age from 5 to 20 year old, the number of remaining tooth by 20 and older age group (by 5 years) and the specific degree of periodontal disease development by age group and also by smoker and non-smoker. It clarifies that DMFT of 12 years old child is 1.68 and DMFT of 20 year-old adult is 7.76.
It also clarifies that, regarding the correlation of smoking with periodontal disease progress, the more the cigarette consumption increases, the more the number of patients infected with middle periodontitis there are. The Survey of Dental Diseases by MHLW is a valuable data to comprehend the patient’s actual condition on the national scale. It is the randomly selected and stratified household survey on the basis of National Livelihood Survey and is regarded to possess with higher reliability as field work. However, the numbers of sample patient are decreasing by every survey; the numbers of sample patient in the survey of 1957 were more than 30,000, but those in the survey of 2005 decreased to 4,606 (consultation rate was 37.2%), especially, there was a significant decrease in the adult between 20 and 24 year old to only 47 sample patients in all. There is a fear that the reliability to the survey declines. Our survey is a hospital statistics of the patients, not a survey over the nation. But the accumulation of epidemiological data at the clinical job site becomes increasingly important.
