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KMID : 0358920170440010011
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Journal of the Korean Academy of Pedodontics
2017 Volume.44 No. 1 p.11 ~ p.19
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Effects of Fused Primary Teeth on the Permanent Dentition
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Seo Ye-Jin
Kim Young-Jin
Kim Hyun-Jung
Nam Soon-Hyeun
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Abstract
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The purpose of the study was to investigate the distribution of primary fused teeth and identify the correlation between primary fused teeth and their effect on permanent dentition. 2575 children between the age of 4 and 6 in Kyungpook National University Hospital from January 2009 to August 2015 were investigated. A total of 84 children (46 boys and 38 girls) had fused teeth. 14 of these children had two fused teeth. Prevalence of caries involvement was in 65% of maxilla and 6% of mandible. Prevalence of permanent successors missing was 86.3% in the cases involving maxillary central and lateral incisor, 70% in mandibular lateral incisor and cuspid, 11.7% in mandibular central and lateral incisor. 27 of 84 children (32.1%) had supernumerary teeth. The highest prevalence rate is seen in the cases involving maxillary central and lateral incisor. Delayed permanent tooth eruption was only observed in the maxilla because of developing supernumerary tooth. Early diagnosis of fused tooth in the primary dentition can allow the dentist to make treatment plan at the appropriate time in accordance with the tooth arrangement and tooth development.
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KEYWORD
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Fused teeth , Permanent successors missing , Developing supernumerary tooth , Delayed eruption
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