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Histopathological Observation of Three Types of Root Resorption Surface in Maxillary Primary Incisors

상악 유절치의 3가지 유형의 치근 흡수면에 관한 병리조직학적 관찰

  • Na, Hyejin (Department of Pediatric Dentistry, College of Dentistry, Yonsei University) ;
  • Son, Hyoju (Department of Pediatric Dentistry, College of Dentistry, Yonsei University) ;
  • Song, Jeseon (Department of Pediatric Dentistry, College of Dentistry, Yonsei University) ;
  • Kim, Seongoh (Department of Pediatric Dentistry, College of Dentistry, Yonsei University) ;
  • Lee, Jaeho (Department of Pediatric Dentistry, College of Dentistry, Yonsei University) ;
  • Choi, Hyungjun (Department of Pediatric Dentistry, College of Dentistry, Yonsei University) ;
  • Choi, Byungjai (Department of Pediatric Dentistry, College of Dentistry, Yonsei University)
  • 나혜진 (연세대학교 치과대학 소아치과학교실) ;
  • 손효주 (연세대학교 치과대학 소아치과학교실) ;
  • 송제선 (연세대학교 치과대학 소아치과학교실) ;
  • 김성오 (연세대학교 치과대학 소아치과학교실) ;
  • 이제호 (연세대학교 치과대학 소아치과학교실) ;
  • 최형준 (연세대학교 치과대학 소아치과학교실) ;
  • 최병재 (연세대학교 치과대학 소아치과학교실)
  • Received : 2017.03.12
  • Accepted : 2017.06.21
  • Published : 2017.08.31

Abstract

Local and general factors have been attributed to root resorption occurred by injuries such as trauma and dental caries that affect periodontal ligament or dental pulp tissue. Pathologic root resorption is different from physiologic root resorption in terms of resorption pattern such as micromorphology of resorption fossae and types of observed cells. Microscopic morphologies and histologic features of physiologic and pathologic root resorption surface of maxillary primary central incisors resulting from trauma and periapical inflammation were observed by scanning electron microscope and light microscope. The morphology of physiologic resorption lacunae was small and oval or circular shape with regularities. The morphology of pathologic resorption lacunae was large and polygonal shape with irregularities compared with the physiologic resorption lacunae. Multinucleated giant cells and mononuclear cells were closely attached to the physiologic and pathologic resorption lacunae, whereas several kinds of mesenchymal cells with numerous inflammatory cells were found in the areas adjacent to the pathologic resorption surface. Compensating cementum formation took place along some of the areas of physiologic and pathologic resorption area resulting from trauma, but could not be observed on pathologic resorption area resulting from periapical inflammation.

전신적 또는 국소적 요소에 의하여 유치 치근이 병적으로 흡수될 수 있으며 치아 우식증이나 외상 등으로 염증성 치근 흡수가 발생할 수 있다. 유치의 병적 치근 흡수면은 생리적인 치근 흡수와 비교할 때 흡수면의 세포와 흡수와의 형태 등의 흡수 양상이 다르다. 이 연구는 생리적 치근 흡수, 외상, 염증성 치근 흡수면의 형태 및 인접한 세포를 주사전자현미경과 광학현미경으로 관찰하였다. 생리적 치근 흡수면의 흡수소와는 원형과 타원형이고 비교적 작고 균일하였다. 외상으로 인한 치근 흡수면과 염증성 치근 흡수면의 흡수소와는 생리적 치근 흡수면의 흡수소와에 비해 다각형이며 크고 불규칙하였다. 생리적 치근 흡수면과 외상으로 인한 치근 흡수면, 염증성 치근 흡수면에서 다핵거대세포와 단핵세포가 관찰되었으며 염증성 치근 흡수면에서는 간엽세포 및 염증세포가 많이 분포되어 있었다. 생리적 치근 흡수면과 외상으로 인한 치근 흡수면에서는 흡수 표면에 백악질양 조직이 침착되었으나, 염증성 치근 흡수면에서는 관찰되지 않았다.

Keywords

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