연세대학교 치과병원에 내원한 어린이에서의 영구치 맹출 시기 및 순서
Timing and sequence of eruption of permanent teeth in a sample of children fromyonsei dental hospital
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치아의 정확한 맹출 시기와 그 순서는 어린이의 발육 성숙도의 지표로서 소아치과 임상 및 예방 교정치료에 있어서 매우 중요하다. 이에 2001~2003년에 연세대학교 치과대학병원 소아치과에 내원한 어린이중 만 5세부터 만 14세까지의 남자 654명, 여자 542명, 총 1,196명의 자료를 수집하여 영구치의 맹출 시기 및 순서에 대한 연구 결과 다음과 같은 결론을 얻었다. 1. 상악 영구치의 맹출 시기는 중절치 남 만6.81세, 여 만6.78세, 측절치 남 만8.30세, 여 만7.98세, 견치 남 만10.28세, 여 만10.04세, 제1소구치 남 만9.74세, 여 만9.90세, 제2소구치 남 만10.87세, 여 만10.41세, 제1대구치 남 만6.25세, 여 만6.54세, 제2대구치 남 만12.21세, 여 만12.03세였다. 2. 하악 영구치의 맹출 시기는 중절치 남 만6.00세, 여 만6.06세, 측절치 남 만6.99세, 여 만6.74세, 견치 남 만9.83세, 여 만9.17세, 제1소구치 남 만9.92세, 여 만9.75세, 제2소구치 남 만10.66세, 여 만10.39세, 제1대구치 남 만5.99세, 여 만5.75세, 제2대구치 남 만11.92세, 여 만12.17세였다. 3. 영구치의 맹출 순서는 상악에서 제1대구치, 중절치, 측절치, 제1소구치, 견치, 제2소구치, 제2대구치의 순이었고, 하악에서 제1대구치, 중절치, 측절치, 견치, 제1소구치, 제2소구치, 제2대구치의 순이었다
Abstract
Accurate timing and sequence of eruption of permanent teeth are indicies of growth and essential for pediatric dentistry and pediatric clinical orthodontics. From the children brought to the Yonsei Dental Hospital during 2001 to 2003, 654 boys and 542 girls, ranging in age from five to fourteen years, were selected and analysed. The following was concluded. 1. Eruption time of maxillary teeth is 6.81 years in boys, 6.78 years in girls for central incisor, 8.30 years in boys, 7.98 years in girls for lateral incisor, 10.28 years in boys, 10.04 years in girls for canine, 9.74 years in boys, 9.90 years in girls for first premolar, 10.87 years in boys, 10.41 years in girls for second premolar, 6.25 years in boys, 6.54 years in girls for first permanent molar, 12.21 years in boys, 12.03 years in girls for second permanent molar. 2. Eruption time of mandibular teeth is 6.00 years in boys, 6.06 years in girls for central incisor, 6.99 years in boys, 6.74 years in girls for lateral incisor, 9.83 years in boys, 9.17 years in girls for canine, 9.92 years in boys, 9.75 years in girls for first premolar, 10.66 years in boys, 10.39 years in girls for second premolar, 5.99 years in boys, 5.75 years in girls for first permanent molar, 11.92 years in boys, 12.17 years in girls for second permanent molar. 3. The following eruption sequence was observed: the first permanent molar erupted first, followed by the central incisor, the lateral incisor, the first premolar, the canine, the second premolar and the second permanent molar in the maxilla. The first permanent molar erupted first, followed by the central incisor, the lateral incisor, the canine, the first premolar, the second premolar and the second permanent molar in the mandible.
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