上顎 中切齒間 正中離開에 關한 統計學的 硏究
The Statistical Study Of Maxillary Median Diastema
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이성주(李性周)/Sung Joo Lee
KMID : 0358919830100010115
Abstract
結論
光州市內 'N' 國民學校의 滿 7歲부터 12歲 兒童 2,082名(男: 1,078名, 女: 1,004名)을 口腔檢
査한 後 1mm以上의 上顎 中切齒間 正中離開를 갖는 兒童 304名(男: 176名, 女: 138)을 硏究
한 結果 다음과 같은 結論을 얻었다.
1. 正中離開 發生率은 14.6%로서 男子가 女子보다 높았으며, 男, 女 共히 8歲에서 最高率을
보였다.
2. 正中離開는 年齡增加에 따라 減少하는 傾向을 나타내었다.
3. 局所的 原因이 없는 正中離開는 上脣小帶의 距離에 있어 上顎 永久中切齒가 萌出한 以後
에는 差異를 나타내지 않았으며, 正中離開度는上顎 永久側切齒가 萌出함에 따라 減少하는
傾向을 나타내었다.
4. 局所的 原因을 갖는 正中離開의 發生率은37.8%였으며 年齡이 增加할수록 높았다.
5. 正中離開 原因別 發生頻度는 다음과 같다.
上顎前齒의 回轉 ; 12.2%, 過剩齒 : 10.9%, 非正常 上脣小帶 ; 9.5%,
peg lateralis : 7.2%, 開咬症 ; 2.6%, 齒間齒槽骨 形態異常 ; 2.6%,
側切齒缺損 ; 0.7%, 上,下顎間 齒牙크기의 不調和 : 0.3%.
#초록#
The author surveyed 2,082 schoolchildren (Male:1,078, Female:1,004) from 7 to 12 years
old in 'N' primary school in kwang Ju City, and studied on )04 schoolchildren (Male:
176, Female: 128) having maxillary median diastema. The results were as follows:
1. The prevalence of maxillary median diastema was 14.675, and it showed the greater
rate at the boys than at the girls and the highest rate at 8 years old in the both sexes.
2. The maxillary median diastema showed decreasing tendency with ageing.
3. The frenum distance in children without local factors showed no change and the
divergent degree of maxillary median diastema showed decreasing tendency after the
eruption of maxillary lateral incisors.
4. The rate of maxillary median diastema associated with local factors was 37.8% and it
showed increasing tendency with ageing.
5. The prevalence of median diastema according to etiology was as follows;
rotated tooth ; 12,2%, supernumerary teeth ; 10.9%, abnormal frenum ; 9.5%,
peg lateralis ; 7.2%, open bite ; 2.6%, abnormal pattern of interseptal alveolar bone;
2.6%, missing lateral incisor : 0.7%, tooth size discrepancy ; 0.3%.
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