永久齒拔去의 原因에 關한 臨床 統計學的 硏究

다국어 초록 (Multilingual Abstract)

This study is proposed to analyze statistically the causes of extraction of permanent teeth among outpatients who visited our dental department of Sung-Sim Hospital, Chung-Ang University from Jan. 29th 1979 to Nov. 30th 1980. The results are as follows.1. The group of patients aged 25-34 had more number of extracted teeth than any other age group.2. It was found that woman's (0.13) was more than man's(0.9) in average number of extracted teeth per patient.3. In analyzing the causes of extraction, it was identified as caries 37.5%, periodontal diseases 27.2%, wisdom teeth 17.6%, for orthodontic treatment and impacted supernumerary teeth and others 8.0% trauma and fracture 4.2%.4. The primary cause of extraction was found to be changed from caries to periodontal diseases according to the increase of age.5. The number of teeth that were extracted by trauma was found that man's (38) was more than twice as much as woman's (17) and the group of patients aged 35-44 had the most number of all age groups.