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KMID : 0358920090360020245
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Journal of the Korean Academy of Pedodontics
2009 Volume.36 No. 2 p.245 ~ p.252
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A CLINICAL STUDY OF CONGENITAL MISSING TEETH
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Jeong Hae-Kyoung
Yang Yeon-Mi
Kim Jae-Gon
Baik Byeong-Ju
Jeong Jin-Woo
Kim Ha-Na
Kim Mi-Ah
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Abstract
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The congenital missing of teeth is common, which takes place since the proliferation and differentiation are not allowed in that tooth bud fail to start development. The purpose of this study is to research incidence rate, number, and missing part of congenital missing teeth, and to study whether a person who has missing teeth has other abnormality of teeth or not. For this study, 1,520 subjects(aged 2.917) who had visited pediatric dentist department of Chonbuk national university dental hospital within 2 years were examined with an panoramic radiograph; exempting third molar missing state. The obtained results are as follows. 1. 8.88% among total subjects show missing teeth; male 9.05%, female 8.64% 2. The most frequently missing permanent teeth were the mandibular second premolars(22.3%). The most frequently missing primary teeth are mandibular lateral incisors(50%). 3. 43.3% patients have one permanent missing tooth, 34.3% have two, and 10.4% have more than six, respectively. In primary teeth, 86.7% patients have one missing tooth, and 13.3% have two missing teeth. 4. 18 patients(13.3%) have missing teeth as well as hyperdontia, while some patients have microdont, ectopic eruption, and fusion teeth.
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KEYWORD
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Congenital missing teeth, Hypodontia, Tooth abnormality
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