A study on the prevalence of dental anomalies in Korean dental-patients

Ju-Hee Lee; Byung-Ho Yang; Sang-Min Lee; Young-Hee Kim; Hye-Won Shim; Hyun-Sook Chung

doi:10.4041/kjod.2011.41.5.346

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Lee, Yang, Lee, Kim, Shim, and Chung: A study on the prevalence of dental anomalies in Korean dental-patients

Original Article

Korean Journal of Orthodontics

Korean Journal of Orthodontics 2011; 41(5): 346-353.

Published online: 31 October 2011

DOI: https://doi.org/10.4041/kjod.2011.41.5.346

A study on the prevalence of dental anomalies in Korean dental-patients

Ju-Hee Lee, MSD^a, Byung-Ho Yang, DDS, MSD, PhD^b, Sang-Min Lee, DDS, MSD, PhD^c, Young-Hee Kim, DDS, MSD, PhD^d, Hye-Won Shim, DDS, MSD^e, Hyun-Sook Chung, DDS, MSD^f

^aResident, Department of Orthodontics, Hallym University Sacred Heart Hospital, Korea.

^bAsoociate Professor, Department of Orthodontics, Hallym University Sacred Heart Hospital, Korea.

^cAssistant Professor, Department of Orthodontics, School of Dentistry, Dankook University, Korea.

^dAssistant Professor, Department of Oral and Maxillofacial Radiology, Hallym University Sacred Heart Hospital, Korea.

^eAssistant Professor, Department of Prothodontics, Hallym University Sacred Heart Hospital, Korea.

^fClinical Instructor, Department of Conservative Dentistry, Hallym University Sacred Heart Hospital, Korea.

Corresponding author: Byung-Ho Yang. Department of Orthodontics, Hallym University Sacred Heart Hospital, 896 Pyeongan-dong, Dongan-gu, Anyang 431-070, Korea. +82 31 380 5976; orthobhy@gmail.com.

Received 16 March 2011 Revised 14 June 2011 Accepted 16 June 2011

Abstract

Objective

The purpose of this study was to investigate the prevalence of dental anomalies in outpatient clinics.

Methods

The subjects of this study were 3,133 patients who visited the clinic between January 2009 and June 2011. The dental records and panoramic films of the patients and detection of supernumerary, missing, and impacted teeth, transposition, and peg lateralis were reviewed. The results were analyzed according to gender and types and locations of dental anomalies.

Results

Among the patients, 362 had dental anomalies, with a prevalence rate of 11.55%. Congenital missing teeth (5.71%) ranked first in the categories, and impacted teeth (3.09%) ranked second. The percentage of patients having supernumerary teeth, peg lateralis, and dislocated teeth were 1.79%, 1.66%, and 0.45%, respectively.

Conclusions

Congenital missing teeth and impacted teeth are, respectively, the first and second most common dental anomalies in Korean dental patients.

Keywords: Tooth impaction, Agenesis, Transposition, Tooth number

Figures and Tables

Fig. 1

Panoramic radiograph showing several dental anomalies. A, Impacted maxillary right canine, peg lateralis of both maxillary lateral incisors; B, impacted supernumerary tooth and impacted mandibular right first premolar.

Table 1

Distribution of subjects in the study

Table 2

Distribution and prevalence of developmental dental anomalies in the subjects

The number of dental anomalies and the number of patients are different because there were some patients who had two or more anomalies. Every patients was counted as 1 regardless of the number of anomalies she/he had.

Table 3

Distribution and location of congenital missing teeth

Table 4

Distribution and location of supernumerary teeth

Table 5

Distribution of peg lateralis

Table 6

Distribution and location of impacted teeth

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