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J Korean Acad Pediatr Dent. 2013;40(4): 274-282.
Prevalence and Distribution of Congenitally Missing Teeth in Patients Visiting the Department of Pediatric Dentistry of Chonbuk National University Hospita
Hyunsoon Jeon Jeon, Yeonmi Yang Yang, Byeongju Baik Baik, Jaegon Kim Kim
Department of Pediatric Dentistry and Institute of Oral Bioscience, School of Dentistry, Chonbuk National University
Corresponding Author: Jaegon Kim Kim ,Tel: +82-63-250-2128, Fax: +82-63-250-2131, Email: pedodent@chonbuk.ac.kr
Received: September 27, 2013;  Accepted: October 24, 2013.
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The goal of this study was to analyze prevalence and distribution of congenitally missing teeth in 3302 patients from 7 to 15 years old, who had visited and taken panoramic radiographs at the Department of Pediatric Dentistry, from January 2008 to December 2012. The prevalence of hypodontia in the males (5.9%) was slightly higher than in the females (4.7%). In the affected patients, the mean number of congenitally missing teeth in the mandible was statistically higher than in the maxilla (p < 0.05). However, there was no significant difference in the number of congenitally missing teeth between left and right dentitions (p > 0.05). Excluding the Mn. third molars, the most frequent congenitally missing teeth site was the Mn. second premolars. In contrast, the most infrequent congenitally missing teeth sites were the Mx. and Mn. first premolars, and Mx. central incisors. The bilateral combination or antagonistic quadrants combination of congenitally missing teeth in hypodontia patients was 80.3%. The result of this study will contribute to clinicians to make accurate diagnosis and establish favorable treatment plans, by offering invaluable data about the number and distribution of congenitally missing teeth.
Keywords: Hypodontia | Missing teeth | Prevalence | Distribution | Oligodontia
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