Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Prevalence and Patterns of Congenitally Missing Teeth among Pediatric Patients Aged 8 - 16 in Pusan National University Dental Hospital

부산대학교 치과병원에 내원한 8 - 16세 환자의 선천성 치아 결손 유병률 및 유형 평가

  • Eunjin Kim (Department of Pediatric Dentistry, School of Dentistry, Pusan National University) ;
  • Soyoung Park (Department of Pediatric Dentistry, Pusan National University Dental Hospital) ;
  • Eungyung Lee (Department of Pediatric Dentistry, School of Dentistry, Pusan National University) ;
  • Taesung Jeong (Department of Pediatric Dentistry, School of Dentistry, Pusan National University) ;
  • Jonghyun Shin (Department of Pediatric Dentistry, School of Dentistry, Pusan National University)
  • 김은진 (부산대학교 치의학전문대학원 소아치과학교실) ;
  • 박소영 (부산대학교 치과병원 소아치과) ;
  • 이은경 (부산대학교 치의학전문대학원 소아치과학교실) ;
  • 정태성 (부산대학교 치의학전문대학원 소아치과학교실) ;
  • 신종현 (부산대학교 치의학전문대학원 소아치과학교실)
  • Received : 2023.02.13
  • Accepted : 2023.04.05
  • Published : 2023.05.31
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Abstract

The purpose of this study was to investigate the prevalence and patterns of congenitally missing teeth in permanent teeth excluding third molars, in patients aged 8 to 16 years who visited Pusan National University Dental Hospital from January 2010 to February 2021. This retrospective study evaluated tooth agenesis and the pattern of missing teeth represented by the tooth agenesis code by reviewing panoramic radiographs and electronic medical records of 11,759 patients, including 5,548 females and 6,211 males. The prevalence of congenitally missing teeth was 10.74% (females 11.95%, males 9.66%, p < 0.0001). Patients with tooth agenesis had an average of 2.22 missing teeth, and congenitally missing teeth occurred more frequently in the mandible (8.39%) than in the maxilla (4.52%, p < 0.0001). The mandibular second premolar (58.19%) was the most frequently missing tooth. The second premolar was the most frequently missing tooth in all quadrants (30.10%, 31.67%, 43.14%, and 35.59%) when a single tooth was absent, while the first and second premolars were the most commonly absent teeth (11.69%, 11.47%, 5.94%, and 5.24%) when two or more teeth were missing. In the relationship between maxillary-mandibular antagonistic quadrants and full mouth, the 1st to 4th place of the missing patterns were all involved with the 1st and 2nd premolars. This study can be clinically helpful in establishing a treatment plan for patients with missing teeth. In addition, it can be used as basic data for molecular biological research to find out the relationship between tooth agenesis and specific genes.

이 연구의 목적은 2010년 1월부터 2021년 2월까지 부산대학교 치과병원에 내원한 8 - 16세 환자를 대상으로 영구치의 선천성 치아 결손 유병률 및 결손 유형을 조사하는 것이다. 총 11,759명(여성 5,548명, 남성 6,211명)의 파노라마 방사선 사진과 전자의무기록을 후향적으로 분석하였다. 선천 결손 유병률은 10.74%였다(여성 11.95%, 남성 9.66%, p < 0.0001). 평균 2.22개의 치아가 결손이 되었으며, 하악(8.39%)의 치아가 결손이 된 경우가 상악(4.52%)에 비해 많았다(p < 0.0001). 가장 빈번하게 결손이 되는 치아는 하악 제2소구치(58.19%)였다. 모든 분악에서 1개의 치아가 결손이 된 경우는 제2소구치가(30.10%, 31.67%, 43.14%, 35.59%), 2개 이상의 치아가 결손이 된 경우는 제1, 2소구치가(11.69%, 11.47%, 5.94%, 5.24%) 가장 많았다. 악궁 간 관계와 전악에서 결손 유형의 1 - 4위는 모두 제1, 2소구치가 연관이 되어 있었다. 이 연구 결과는 선천적 치아 결손 환자의 치료 계획 설립에 임상적 보탬이 될 수 있으며 특정 유전자와의 연관성을 밝혀내기 위한 분자생물학적 연구의 기초자료로 활용될 수 있을 것이다.

Keywords

Acknowledgement

This work was supported for 2 years by Pusan National University Research Grant.

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