Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Analysis of the Characteristics of First Permanent Molars with Delayed Eruption

제1대구치 맹출 지연의 유형에 따른 특징 분석

  • Lee, Hosun (Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University) ;
  • Lee, Koeun (Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University) ;
  • Kim, Misun (Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University) ;
  • Nam, Okhyung (Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University) ;
  • Lee, Hyo-Seol (Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University) ;
  • Choi, Sungchul (Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University)
  • 이호선 (경희대학교 치과대학 소아치과학교실) ;
  • 이고은 (경희대학교 치과대학 소아치과학교실) ;
  • 김미선 (경희대학교 치과대학 소아치과학교실) ;
  • 남옥형 (경희대학교 치과대학 소아치과학교실) ;
  • 이효설 (경희대학교 치과대학 소아치과학교실) ;
  • 최성철 (경희대학교 치과대학 소아치과학교실)
  • Received : 2021.10.19
  • Accepted : 2021.11.18
  • Published : 2022.02.28
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Abstract

The first permanent molars play a key role in maxillofacial development and occlusion. The purpose of this study is to investigate the characteristics and development stages of first molars with delayed eruption, and to evaluate their associations with congenital missing teeth. Eight-year-old patients who had delayed eruption in their first molars were classified into 75 patients with physical barriers and 77 patients without physical barriers. The development stages of the first and second molars in the delayed area were analyzed using Nolla method from the panoramic radiographs. The relationship between congenital missing teeth and delayed area was also investigated. Delayed eruption of first molars were more common in the maxilla alone. With the presence of physical barriers, male patients showed higher frequency in unilateral cases, while female patients had higher bilateral cases when there was no physical barrier. Delayed development of first molars were observed in delayed eruption area. In the absence of physical barriers, adjacent second molars were also developed slowly and the incidence of congenital missing teeth was high in delayed area. If first molars with delayed eruption are observed, clinical and radiographical follow-ups are necessary for the evaluation of their developmental stages and congenital missing teeth.

제1대구치는 악안면 부위의 발달과 교합에 중요한 기능을 갖는다. 이번 연구의 목적은 맹출 지연된 제1대구치의 유형에 따른 특징에 대해 조사하고 치아의 발육 상태 및 선천적 결손과의 연관성에 대해 알아보고자 하는 것이다. 맹출 지연된 제1대구치를 가진 만 8세 환자를 물리적 장애가 있는 75명과 없는 77명으로 구분하였다. 파노라마 방사선 사진에서 맹출 지연된 영역의 제1대구치 및 제2대구치의 발육 상태를 Nolla 방법을 이용하여 분석하였다. 선천적 결손과 제1대구치 맹출 지연 영역과의 연관성도 알아보았다. 제1대구치 맹출 지연은 상악 단독으로 많이 존재했다. 물리적 장애로 인한 맹출 지연은 남자에서 편측성으로 많이 나타났고, 물리적 장애가 없는 경우에는 여자에서 양측성으로 더 많이 나타났다. 맹출 지연된 제1대구치에서 발육 지연이 나타났고, 물리적 장애가 없는 경우에는 인접한 제2대구치의 발육 지연과 해당 영역의 높은 선천적 결손치 비율을 보였다. 제1대구치의 맹출 지연이 관찰된다면, 치아의 발육 상태와 선천적 결손치에 대한 주기적인 임상적, 방사선학적 평가가 필요할 것이다.

Keywords

References

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