Okawa Y, Sugihara N, Maki Y, Ikeda Y, Takaesu Y
Department of Hygiene and Community Dentistry, Tokyo Dental College, Japan.
Bull Tokyo Dent Coll. 1993 Aug;34(3):107-13.
The purpose of the present study was to investigate the prevalence of root caries in an adult population in Japan. A total of 770 company employees aged 20-59 were examined in 1990. The subjects were all dentate and had 27.2 present teeth on the average. The proportion of gingival recession in this population ranged from 20.1% for the 20-29 year old group to 75.2% for the 50-59 year old group, with an average of 44.0%. In the present study, 3.2% of the subjects showed one or more active root caries. The prevalence of active root caries ranged from 0.4% at age 20-29 to 7.1% at age 50-59. The proportion of persons with active root caries and/or root fillings ranged from 1.3% at age 20-29 to 36.3% at age 50-59. The percentage of subjects with active and/or inactive caries and/or root fillings varied from 3.1% at age 20-29 to 43.4% at age 50-59. The prevalence of active root caries in the subjects at risk (with gingival recession) was 7.4% on the average and ranged from 2.2% at age 20-29 to 9.4% at age 50-59. The percentage of persons with active root caries and/or root fillings in the subjects at risk ranged from 6.7% at age 20-29 to 48.2% at age 50-59. The mean number of teeth with active root lesions was 0.09 per person, and the mean number of teeth with root fillings was 1.25 at age 50-59.(ABSTRACT TRUNCATED AT 250 WORDS)
本研究的目的是调查日本成年人群中根龋的患病率。1990年，共对770名年龄在20至59岁的公司员工进行了检查。所有受试者均有牙齿，平均有27.2颗现存牙齿。该人群中牙龈退缩的比例从20至29岁组的20.1%到50至59岁组的75.2%不等，平均为44.0%。在本研究中，3.2%的受试者有一个或多个活动性根龋。活动性根龋的患病率从20至29岁时的0.4%到50至59岁时的7.1%不等。有活动性根龋和/或根充填的人群比例从20至29岁时的1.3%到50至59岁时的36.3%不等。有活动性和/或非活动性龋和/或根充填的受试者百分比从20至29岁时的3.1%到50至59岁时的43.4%不等。有风险（牙龈退缩）受试者中活动性根龋的平均患病率为7.4%，范围从20至29岁时的2.2%到50至59岁时的9.4%。有风险受试者中有活动性根龋和/或根充填的人群比例从20至29岁时的6.7%到50至59岁时的48.2%不等。有活动性根病变牙齿的人均数量为0.09颗，50至59岁时根充填牙齿的人均数量为1.25颗。（摘要截选至250字）
