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KJO Korean Journal of Orthodontics

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eISSN 2005-372X
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Korean J Orthod   

First Published Date July 18, 2022

Copyright © The Korean Association of Orthodontists.

Common dental anomalies in Korean orthodontic patients: An update

Ja Hyeong Kua , Byoul Hanb, Jaehyun Kima, Jiyoung Oha, Yoon-Ah Kooka, Yoonji Kima

aDepartment of Orthodontics, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
bGraduate School of Clinical Dental Science, The Catholic University of Korea, Seoul, Korea

Correspondence to:Yoonji Kim.
Associate Professor and Chair, Department of Orthodontics, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 06591, Korea.
Tel +82-2-2258-1776 e-mail juice@catholic.ac.kr

How to cite this article: Ku JH, Han B, Kim J, Oh Ji, Kook YA, Kim Y. Common dental anomalies in Korean orthodontic patients: An update. Korean J Orthod. First published date July 18, 2022. https://doi.org/10.4041/kjod21.280

Received: November 1, 2021; Revised: January 16, 2022; Accepted: March 19, 2022

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: Dentofacial anomalies, Classification, Tooth impaction

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Korean J Orthod   

First Published Date July 18, 2022

Copyright © The Korean Association of Orthodontists.

Common dental anomalies in Korean orthodontic patients: An update

Ja Hyeong Kua , Byoul Hanb, Jaehyun Kima, Jiyoung Oha, Yoon-Ah Kooka, Yoonji Kima

aDepartment of Orthodontics, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
bGraduate School of Clinical Dental Science, The Catholic University of Korea, Seoul, Korea

Correspondence to:Yoonji Kim.
Associate Professor and Chair, Department of Orthodontics, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 06591, Korea.
Tel +82-2-2258-1776 e-mail juice@catholic.ac.kr

How to cite this article: Ku JH, Han B, Kim J, Oh Ji, Kook YA, Kim Y. Common dental anomalies in Korean orthodontic patients: An update. Korean J Orthod. First published date July 18, 2022. https://doi.org/10.4041/kjod21.280

Received: November 1, 2021; Revised: January 16, 2022; Accepted: March 19, 2022

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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: Dentofacial anomalies, Classification, Tooth impaction