Prevalence of delayed tooth development and its relation to tooth agenesis in Korean children.
OBJECTIVE
The aim of this study was to investigate the epidemiology of delayed tooth development (DTD) and the link between DTD and tooth agenesis (TA).


METHODS
The dental maturity of all of the developing permanent teeth of 4611 children (2417 males and 2194 females) was evaluated from panoramic radiographs. The prevalence of DTD and TA was analyzed, and gender difference for DTS and TA was investigated. The correlation of DTD and TA was investigated in intra-fields and inter-fields.


RESULTS
The total prevalence of DTD among the 4611 children was 3.40%. The maxillary second premolar was the most frequently delayed tooth (1.02%), followed by the maxillary second molar (0.88%) and the mandibular second premolar (0.74%). DTD significantly correlated with TA in both intra-fields and inter-fields (p<0.05).


CONCLUSIONS
The field of delayed development exhibited a significant correlation with that of TA.
Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
Min Kyoung
MK
Park
Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
Min Kyung
MK
Shin
Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
Seong Oh
SO
Kim
Department of Pediatric Dentistry, College of Dentistry, Kyunghee University, Seoul, Republic of Korea.
Hyo Seol
HS
Lee
Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
Jae-Ho
JH
Lee
Division in Anatomy and Developmental Biology, Department of Oral Biology, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
Han-Sung
HS
Jung
Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea. Electronic address: songjs@yuhs.ac.
Je Seon
JS
Song
D000366:Age Determination by Teeth; D000848:Anodontia / Q000000981:diagnostic imaging / Q000453:epidemiology*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D009805:Odontogenesis; D015995:Prevalence; D011862:Radiography, Panoramic / Q000379:methods; D056910:Republic of Korea / Q000453:epidemiology; D014071:Tooth Abnormalities / Q000000981:diagnostic imaging / Q000453:epidemiology*; D014078:Tooth Eruption / Q000502:physiology*
Correlation; Delayed tooth development; Korean children; Tooth agenesis