A statistical observation of the orthodontic patients seen during the fifteen-years period in the Department of Orthodontics at Osaka University Dental Hospital

NAGATA,Hiroyasu, YAMAMOTO,Teruko, IWASAKI,Makiko, SORIHASHI,Yuka, TANAKA,Eiji, KAWAKAMI,Masayoshi, TAKADA,Kenji, SAKUDA,Mamoru

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Other Title

過去 15 年間に大阪大学歯学部附属病院矯正科に来院した矯正患者の統計的観察

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A statistical investigation was carried out on 4, 628 orthodontic patients (1, 622 males and 3, 006 females) without cleft lip and/or palate in the Department of Orthodontics at Osaka University Dental Hospital during the 15 years from April 1978 to March 1992. The findings were as follows : 1. The residence of most patients was distributed within a 20km radius and within Osaka Prefecture. 2. The ratio between males and females was 1 : 1.9. 3. The age of most patients was ranged between seven to twelve years. Recently, the rate of the thirteen years or over was increased. The rate of the patients in the dental developmental stage IIIB was higher than that of the others. 4. The incidence of the malocclusions for males was the highest in the anterior crossbite, and in crowding of the teeth for females. For both males and females, the incidence of the anterior crossbite was decreased and that of crowding was increased year after year. 5. The rate of the Angle Class I malocclusion was the highest. The rate of skeletal 3 base malocclusions was the highest for males, and that of skeletal 1 was the highest for females.

Journal

日本矯正歯科学会雑誌

日本矯正歯科学会雑誌 53 (5), 598-605,

日本矯正歯科学会

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CRID: 1541698620233442688

NII Article ID: 110004013054

NII Book ID: AN00187725

Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10631055; https://search.jamas.or.jp/link/ui/1995190397