Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Supernumerary Teeth in Monozygotic Twins

일란성 쌍생아들에서 관찰된 과잉치

  • Kim, Sohyun (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University) ;
  • Kim, Young-Jin (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University) ;
  • Kim, Hyun-Jung (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University) ;
  • Nam, Soon-Hyeun (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University)
  • 김소현 (경북대학교 치의학전문대학원 소아치과학교실) ;
  • 김영진 (경북대학교 치의학전문대학원 소아치과학교실) ;
  • 김현정 (경북대학교 치의학전문대학원 소아치과학교실) ;
  • 남순현 (경북대학교 치의학전문대학원 소아치과학교실)
  • Received : 2013.01.18
  • Accepted : 2013.07.24
  • Published : 2013.08.30
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Abstract

Although the first case of supernumerary teeth had been documented almost 20 centuries ago, the etiology of supernumerary teeth still remains unclear. The prevalence of supernumerary teeth in the general Asian population is between 2.7% and 3.4%. The pathogenesis of supernumerary teeth has been attributed to phylogenetic reversion(atavism), splitting of the tooth bud(dichotomy theory), locally induced hyperactivity of the dental lamina and a combination of genetic and environmental factors(unified etiologic explanation). This report describes 3 cases of monozygotic twins with mesiodens who visited the pediatric dental clinic of Kyungpook national university hospital, and this is significant to support genetic factors involoved in the development of supernumerary teeth.

과잉치의 발생 원인 및 빈도, 치료 등 과잉치에 대한 많은 선학의 연구가 있었으나, 현재에 있어서도 과잉치의 발생 원인은 여전히 명확하지 않은 상태이다. 전체 인구에서 0.15%~1.0%의 발병률을 보이는 과잉치의 병인론으로는 계통발생학적 돌연변이(atavism), 치배분열론(dichotomy theory), 치아판의 국소적인 증식 그리고 유전 및 환경적 요인들의 조합(unified etiologic explanation) 등이 있다. 동일한 수정란으로부터 생긴 쌍생아인 일란성 쌍생아는 유전학적으로 동일한 개체이다. 이들에게서 나타난 과잉치에 대한 보고는 과잉치의 병인론에 있어 유전적인 요인이 강하게 작용함을 뒷받침할 수 있다는 면에서 의미를 가진다. 본 연구에서는 경북대학교 치과병원 소아치과 외래를 내원한 3쌍의 일란성 쌍생아에서 나타난 과잉치를 관찰하였으며, 이는 유전적인 원인에 의한 과잉치의 발생을 뒷받침함에 의미가 있어 보고하는 바이다.

Keywords

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