永久齒 拔齒의 原因別 統計 및 齒齡에 關한 報告 = A statistical study on causes of permanent tooth loss and tooth mortality

국문 초록 (Abstract)

健全한 齒牙의 維持 保存은 齒科醫學의 窮極的 目標이다. 그러나 여러 原因으로 拔去하게 됨으로써 年齡 增加에 따라 現存 齒兒數는 減少되어가고 이에 따라 本來의 機能도 喪失되어간다.
筆者는 過去 二年間 梨花炳院 齒科에 來院한 患者 2,221名 중 永久齒를 拔去한 519名 815個齒牙를 그 原因을 ① 齒牙우식증 ② 齒周疾患 ③ 補綴上 理由 ④ 埋伏 또는 囊腫 등의 口腔外科的 理由 ⑤ 矯正治療의 目的 ⑥ 外傷으로 分類하고 拔去當時의 年齡을 調査하여 다음과 같은 結論을 얻었다.
(1) 齒牙 拔去의 原因 중에서 齒牙우식증이 48.9%, 齒周疾患이 29.0%로서 全體例의 約 8割(77.9%)을 占하여 外科的 理由가 11.7%로 비교적 높았다.
(2) 年齡의 增加에 따라 齒牙우식증으로 인한 拔去는 漸次 低下되고 反對로 齒周疾患으로 因한것은 顯著한 上昇 추세를 보였다.
(3) 性別로 보면 男子에서는 上下握 對比가 57.5:42.5인데 女子에서는 41.0:58.9%이고 齒牙別로는 下握第三·第一大臼齒가 가장 높은 편이고 下握 中·側切齒 및 上下握 犬齒에서 가장 낮았다.
(4) 齒齡은 上下握 第二大臼齒, 下握中·側切齒등이 높았고, 下握 第三·第一大臼齒 등이 낮아 拔齒의 原因과 密接한 關係가 있음이 明白히 立證되었다.

다국어 초록 (Multilingual Abstract)

This was to study 1) the cause of extraction by age and tooth types, and 2) tooth mor-tality with 2,221 out-patients who had visited to the Department of Dentistry, Ewha Womans University Hospital from January 1974 to December 1975.
The following results were obtained:
(1) 519 of 2,221 patients (23.3%) were extracted their one or more teeth by various causes and the average number of extracted teeth were 1.5 in male and 1.6 in female.
(2) The most prevalent causes of tooth loss were due to advanced dental caries (49.0%), periodontal disease (29.1%), and impacted teeth, cyst or other oral lesions (11.85).
(3) While the age increased tooth mortality due to dental caries was reduced gradual-ly from 73.1% in adolescent group to 15.8% in the 5th decade, and the number of tooth loss caused by periodontal disease was getting higher in the 4th decade (50.8%) and in the 5th decade (82.25).
(4) Mean age of permanent tooth mortality in male was 37.70 and in female was 34.41.
(5) The relatively high mortalities of individual teeth were revealed as follows; ??(15.7%), ??(14.9%), ??(10.6%), ??(9.8%).
(6) The maxillary and mandible second molars, mandible central and lateral incis-ors retained longest, and mandible first and third molars, maxillary central incisors and third molars showed shortest in their mean age.
(7) The tooth mortalities of male were longer than female, and maxillary teeth were longer than mandibular teeth.