The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Common dental anomalies in Korean orthodontic patients: An update

  • Ku, Ja Hyeong (Department of Orthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Han, Byoul (Graduate School of Clinical Dental Science, The Catholic University of Korea) ;
  • Kim, Jaehyun (Department of Orthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Oh, Jiyoung (Department of Orthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Kook, Yoon-Ah (Department of Orthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Kim, Yoonji (Department of Orthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea)
  • Received : 2021.11.01
  • Accepted : 2022.03.19
  • Published : 2022.09.25
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Abstract

Objective: The aim of this study was 1) to investigate the prevalence and pattern of dental anomalies (DAs), 2) to compare DAs according to the type of malocclusion, and 3) to investigate the correlation between tooth impaction and other DAs in the Korean orthodontic population. Methods: A total of 3,240 orthodontic patients were classified as Class I, Class II, or Class III malocclusion groups. The presence and location of common DAs, including impaction, microdontia, agenesis, supernumerary tooth, transposition, and fusion, were identified by examining diagnostic records. Furthermore, samples were classified as Group 1 without impaction or Group 2 with impaction. The prevalence of other DAs concurrent with impaction was investigated and compared to Group 1. Results: Impaction was the most prevalent DA, followed by microdontia, agenesis, and supernumerary. Class I and Class III groups showed the same order of prevalence, but agenesis was more frequent than microdontia in the Class II group. The prevalence of the four DAs was lowest in the Class III group. Overall, 8.6% of patients were classified into Group 2. The incidence of DAs other than impaction and the prevalence of multiple concurrent DAs were significantly higher in Group 2. Impaction showed a significant relationship with supernumerary tooth, transposition, and fusion. Conclusions: The prevalence and pattern of DAs varied depending on the type of malocclusion. As there was a higher risk of other DAs in patients with impacted teeth, early detection of the impacted tooth and a detailed diagnosis of other possible DAs may be essential.

Keywords

Acknowledgement

This study was supported in part by the Alumni Fund of the Department of Dentistry and Graduate School of Clinical Dental Science, The Catholic University of Korea. We would like to thank Mrs. YJ Lee for the meticulous data collection.

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