Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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The Relationship between Additional Mesiopalatal Roots of Maxillary Primary Second Molars and Premolars

상악 제2유구치의 근심구개측 부가치근과 상악 제2소구치 사이의 연관성

  • Jung, Woobum (Department of Pediatric Dentistry, Kyung Hee University Dental Hospital) ;
  • Lee, Koeun (Department of Pediatric Dentistry, Kyung Hee University Dental Hospital) ;
  • Kim, Misun (Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University) ;
  • Nam, Okhyung (Department of Pediatric Dentistry, Kyung Hee University Dental Hospital) ;
  • Choi, Sungchul (Department of Pediatric Dentistry, Kyung Hee University Dental Hospital) ;
  • Kim, Kwangchul (Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University) ;
  • Lee, Hyoseol (Department of Pediatric Dentistry, Kyung Hee University Dental Hospital)
  • 정우범 (경희대학교 치과병원 소아치과) ;
  • 이고은 (경희대학교 치과병원 소아치과) ;
  • 김미선 (경희대학교 치의학전문대학원 소아치과학교실) ;
  • 남옥형 (경희대학교 치과병원 소아치과) ;
  • 최성철 (경희대학교 치과병원 소아치과) ;
  • 김광철 (경희대학교 치의학전문대학원 소아치과학교실) ;
  • 이효설 (경희대학교 치과병원 소아치과)
  • Received : 2020.03.30
  • Accepted : 2020.05.13
  • Published : 2020.11.30
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Abstract

The primary maxillary second molars usually have three roots. However, an additional root located mesiopalatally is occasionally observed. This study aimed to determine the relationship between a mesiopalatal root of primary maxillary second molars and an abnormal eruption pattern of maxillary second premolars. The study was performed on cone beam computed tomography images taken from 916 children who visited the Dental Hospital of Kyung Hee University from 2010 to 2018. 744 serial cross-sectional cone beam computed tomography images were evaluated. The overall incidence of the mesiopalatal root of primary maxillary second molars was 3.2% (n = 24) and the abnormal eruption pattern of maxillary second premolars was 19.2% (n = 143). Especially, patients with the mesiopalatal root of primary maxillary second molars were significantly more likely to have the abnormal eruption pattern on maxillary second premolars (p = 0.000). The odds of the abnormal eruption pattern of maxillary second premolars with the mesiopalatal root of primary maxillary second molars was about 13 times higher than those without. The eruption pattern of the permanent successor should be carefully observed and treated if the mesiopalatal root of primary maxillary second molar is existent.

상악 제2유구치는 일반적으로 3개의 치근을 갖는다. 하지만 드물게 근심구개측에 부가치근이 존재할 수 있다. 이 연구의 목적은 상악 제2유구치의 근심구개측 치근과 계승 영구치인 상악 제2유구치의 비정상적인 맹출 양상과의 연관성에 대해서 알아보는 것이다. 2010년 1월부터 2018년 12월까지 경희대학교 치과병원에 내원하여 전산화 단층 방사선 사진을 촬영한 3세부터 12세 어린이 916명을 대상으로 하였으며 744명의 어린이가 최종대상자로 선정되었다. 상악 제2유구치의 근심구개측 치근 발생률은 3.2%였으며 상악 제2소구치가 비정상적인 맹출 양상을 보이는 발생률은 19.2%였다. 상악 제2유구치의 근심구개측 치근이 존재할 때 상악 제2소구치가 비정상적인 맹출 양상을 보일 위험성이 상악 제2유구치가 근심구개측 치근이 없는 경우보다 약 13배 더 높았다. 상악 제2유구치에 근심구개측 치근이 존재한다면, 계승 영구치의 맹출 양상을 주의 깊게 관찰해야 하며 필요 시 치료가 개입되어야 한다.

Keywords

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