Yang W S
Department of Orthodontics, College of Dentistry, Seoul National University.
Taehan Chikkwa Uisa Hyophoe Chi. 1990 Sep;28(9):811-21.
From 1965 to 1974, the total number of the orthodontic patients who visited Seoul National University Hospital was only about 1000. But in the last several years the number has been increasing so rapidly that we have about 1000 new orthodontic patients every year. This made it necessary to undertake an epidemiologic study on them so that we can accommodate their orthodontic needs adequately. Accordingly, the present study was done in an attempt to provide reliable quantitative information regarding the characteristics of malocclusion-Angle's classification etc.--of patients who visited Department of Orthodontics, Seoul National University Hospital from 1985 to 1989. The total number was 3305. This study sought to determine the annual trend in total number during 5 years, frequency in each age and sex group and distribution according to Angle's classification. It was found that: 1. Total number of orthodontic patients has been increasing and the number of female patients was 1.55 times as high as that of male. 2. Percentage of Class III malocclusion has been increasing, but that of Class I decreasing. Each percentage of Class I, Class II div. 1, Class II div. 2 and Class III was 35.92%, 13.40%, 1.54%, and 49.14%. 3. Percentages of 8 to 12-year-old group and 12 to 18-year-old group showed decreasing trends, but that of adult patients showed increasing trend.
1965年至1974年期间，前往首尔国立大学医院就诊的正畸患者总数仅约1000人。但在过去几年中，这一数字增长迅速，以至于我们每年有大约1000名新的正畸患者。因此，有必要对他们进行一项流行病学研究，以便我们能够充分满足他们的正畸需求。据此，本研究旨在提供有关1985年至1989年期间前往首尔国立大学医院正畸科就诊患者错牙合特征（安氏分类等）的可靠定量信息。总数为3305人。本研究试图确定5年间总数的年度趋势、各年龄和性别组的频率以及根据安氏分类的分布情况。结果发现：1.正畸患者总数一直在增加，女性患者数量是男性患者的1.55倍。2. Ⅲ类错牙合的百分比一直在增加，而Ⅰ类错牙合的百分比在下降。Ⅰ类、Ⅱ类1分类、Ⅱ类2分类和Ⅲ类的百分比分别为35.92%、13.40%、1.54%和49.14%。3. 8至12岁组和12至18岁组的百分比呈下降趋势，但成年患者的百分比呈上升趋势。
