As the interest of a chronic disease are rising the main social problems in the medical security system of Korea, the control of these diseases becomes to be important issue of the modern Korean society. Now, dental caries is ranked as first the class of all the chronic disease in Korea. In order to maintain the oral health for Korean, it is important to detect and remove the cause of teeth extraction. Dental health is considered to be one of the most important part as total health. Therefore it is needed in national level to find the cause of tooth extracted.
The purpose of this study was to analyze the cause of deciduous tooth extraction in Korean population. 2 community dental practioners per 4 each urban areas were chosen randomly, because there lives 78% of Korean. 4 urban areas were Seoul, Inchun, Ansan, and Chonju having a population more than half a million,. as the metropolitan and large cities. 1 community dental practioner per each 4 rural areas was chosen randomly, because there lives 22% of Korean. 4 rural areas were Kuri, Chungeub, Kimjae and Buyeou having a population less than 200 thousands, complexed cities of city and rural community. In the complexed cities, half of the population lives in urban area and the other half in rural area. To examine extracted deciduous teeth directly by visual inspection, the author collected 926 deciduous teeth from 912 patients, extracted by general dental practitioners.
The author analyzed the cause of teeth extracted by age, sex, area, tooth-kind for the 926 teeth. The cause of teeth extracted were physiologic exfoliation due to permanent tooth eruption, dental caries, and others. The results obtained were as follows:
1. Among the causes of tooth extraction, the rate was 87.3% a in physiologic exfoliation, 11.9% in dental
caries.
2. The physiologic exfoliation was the major cause of deciduous tooth extraction from 4 to 15 year-old for both sexes, and 57.3% of physiologic exfoliation tooth have experienced dental caries.
3. The average surface number of dental caries was 3.26 surface in extracted teeth due to dental caries, but 1.45 surface in physiologic exfoliation.
4. The rate of experience of dental caries was higher in the second molar than in the first molar of maxilla, but higher in the first molar than second molar of mandible.
We concluded that the first target of caries control in deciduous tooth is prevention of dental caries in the government level.
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