Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Predictive Factors of Ectopic Eruption of the Maxillary First Permanent Molar

상악 제1대구치 이소 맹출의 예측 인자

  • Sun, Jimin (Department of Pediatric Dentistry, School of Dentistry, Kyung-Hee University) ;
  • Nam, Okhyung (Department of Pediatric Dentistry, School of Dentistry, Kyung-Hee University) ;
  • Kim, Misun (Department of Pediatric Dentistry, School of Dentistry, Kyung-Hee University) ;
  • Lee, Hyoseol (Department of Pediatric Dentistry, School of Dentistry, Kyung-Hee University) ;
  • Choi, Sungchul (Department of Pediatric Dentistry, School of Dentistry, Kyung-Hee University)
  • 선지민 (경희대학교 치의학전문대학원 소아치과학교실) ;
  • 남옥형 (경희대학교 치의학전문대학원 소아치과학교실) ;
  • 김미선 (경희대학교 치의학전문대학원 소아치과학교실) ;
  • 이효설 (경희대학교 치의학전문대학원 소아치과학교실) ;
  • 최성철 (경희대학교 치의학전문대학원 소아치과학교실)
  • Received : 2015.11.17
  • Accepted : 2015.11.26
  • Published : 2016.08.31
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Abstract

In order to provide a diagnostic basis for predicting the possibility of the self-correction of ectopic first permanent molars, differences among normal eruption, reversible and irreversible ectopic eruption of maxillary first permanent molars were retrospectively analyzed. The angles of the long axes and the occlusal lines between the maxillary first permanent molar and the adjacent tooth were measured by panoramic radiographs. The occlusal relationship of second primary molars was also investigated. There is a statistically significant difference between the ectopic eruption group and normal group (p < 0.05), but not between the reversible and irreversible ectopic eruption groups (p > 0.05). The angles between the second primary molar and the first permanent molar, the second primary molar and the second permanent molar in ectopic groups showed a smaller degree than those of the control group. Mesial step was found more frequently in the ectopic eruption group than the normal group. In conclusion, the angulation of the first permanent molar and tooth germ of the maxillary second permanent molar showed close relation with ectopic eruption of the maxillary first permanent molar and ectopic first permanent molar is likely to occur in class III patients with maxillary deficiency.

본 연구는 이소맹출한 상악 제1대구치의 자율적 수정 가능성을 예측할 수 있는 진단적 기초를 제공하기 위하여 정상군과 가역성과 비가역성 이소맹출의 차이점을 비교 평가하고자 후향적으로 분석하였다. 상악 제1대구치와 인접치아 간의 장축과 교합평면간의 각도를 파노라마상에서 측정하였고, 제2유구치의 교합관계도 조사하였다. 이소맹출군과 정상군은 통계학적으로 유의한 차이를 보였지만(p < 0.05), 가역성과 비가역성 이소맹출군 간에는 통계학적으로 유의한 차이는 없었다(p > 0.05). 제2유구치와 제1대구치 그리고 제2대구치 치배 간의 각도는 정상군에 비해 이소맹출 군에서 작은 값을 보였으며, 근심 계단형이 이소맹출군에서 더 높은 빈도로 관찰되었다. 본 연구의 결과를 토대로 상악 제1대구치의 이소맹출은 상악 제1대구치와 제2대구치 치배의 각도와 관련이 있으며, 이소맹출한 상악 제1대구치는 상악 저성장의 3급 부정교합 환자에서 보다 빈번하게 나타나는 경향이 있는 것을 알 수 있었다.

Keywords

References

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