Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
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Three dimensional evaluation of impacted mesiodens using dental cone beam CT

치과용 콘빔 CT를 이용한 상악 정중과잉치의 3차원 분석

  • Lee, Dong-Ho (School of Dentistry, Chonnam National University) ;
  • Lee, Jea-Seo (Department of Oral and Maxillofaical Radiology, Dental Science Research Institute, School of Dentistry, Chonnam National University) ;
  • Yoon, Suk-Ja (Department of Oral and Maxillofaical Radiology, Dental Science Research Institute, School of Dentistry, Chonnam National University) ;
  • Kang, Byung-Cheol (Department of Oral and Maxillofaical Radiology, Dental Science Research Institute, School of Dentistry, Chonnam National University)
  • 이동호 (전남대학교 치의학전문대학원) ;
  • 이재서 (전남대학교 치의학전문대학원 구강악안면방사선학교실 및 치의학연구소) ;
  • 윤숙자 (전남대학교 치의학전문대학원 구강악안면방사선학교실 및 치의학연구소) ;
  • 강병철 (전남대학교 치의학전문대학원 구강악안면방사선학교실 및 치의학연구소)
  • Received : 2010.06.24
  • Accepted : 2010.08.20
  • Published : 2010.09.30
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Abstract

Purpose : This study was performed to analyze the position, pattern of impacted mesiodens, and their relationship to the adjacent teeth using Dental cone-beam CT. Materials and Methods : Sixty-two dental cone-beam CT images with 81 impacted mesiodenses were selected from about 2,298 cone-beam CT images at Chonnam National University Dental Hospital from June 2006 to March 2009. The position, pattern, shape of impacted mesiodenses and their complications were analyzed in cone-beam CT including 3D images. Results : The sex ratio (M : F) was 2.9 : 1. Most of the mesiodenses (87.7%) were located at palatal side to the incisors. 79% of the mesiodenses were conical in shape. 60.5% of the mesiodenses were inverted, 21% normal erupting direction, and 18.5% transverse direction. The complications due to the presence of mesiodenses were none in 43.5%, diastema in 19.4%, tooth displacement in 17.7%, delayed eruption or impaction in 12.9%, tooth rotation in 4.8%, and dentigerous cyst in 1.7%. Conclusions : Dental cone-beam CT images with 3D provided 3-dimensional perception of mesiodens to the neighboring teeth. This results would be helpful for management of the impacted mesiodens.

Keywords

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