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An epidemiological study of supernumerary primary teeth in Japanese children: a review of racial differences in the prevalence
Author(s) -
Miyoshi S.,
Tanaka S.,
Kunimatsu H.,
Murakami Y.,
Fukami M.,
Fujisawa S.
Publication year - 2000
Publication title -
oral diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.953
H-Index - 87
eISSN - 1601-0825
pISSN - 1354-523X
DOI - 10.1111/j.1601-0825.2000.tb00108.x
Subject(s) - supernumerary , medicine , epidemiology , dentistry , statistical analysis , orthodontics , pathology , statistics , mathematics
OBJECTIVE: To clarify the prevalence of supernumerary primary teeth in Japanese children, we evaluated this prevalence in a sample of 8122 children aged 3–6 yearS. Furthermore, we undertook a statistical comparison of the findings of the present study with those of previous investigations on the prevalence of supernumerary primary teeth in Japanese, Chinese and Caucasian children. SUBJECTS: The subjects used in the study consisted of 8122 children aged 3–6 years (4102 boys and 4020 girls). The children were examined in kindergartens. METHODS: The prevalence of supernumerary primary teeth was recorded by visual inspection. Statistical analysis was carried out using the χ 2 test. RESULTS: Four cases of supernumerary primary teeth were found among the children examined, and thus the prevalence was 0.05%.All of the supernumerary primary teeth were located in the maxillary lateral incisor area. CONCLUSIONS: The prevalence in a sample of 8122 Japanese children was 0.05% and that in a combined sample of 65 068 Japanese children was 0.06%.