Median ages of eruption of the primary teeth in white and Hispanic children from Arizona.
OBJECTIVE
The purpose of this project was to establish median eruption ages of primary teeth and evaluate eruption differences between contralateral teeth by gender, ethnicity, and household income. Data was derived from a caries study of preschool children.


METHODS
A total of 4,277 white (non-Hispanic) and Hispanic preschool children from Arizona were visually examined for caries and tooth eruption status by 5 examiners between February 1994 and September 1995. Analyses of eruption status were conducted using logistic regression to produce an eruption probability distribution from which median eruption ages for the primary teeth were determined. Possible differences in eruption timing between contralateral teeth by gender, ethnicity, and household income were examined.


RESULTS
Eruption status of 1 tooth was significantly predictive of the pair-matched tooth for all pairs. Differences were found for the maxillary central incisor (gender) and the mandibular second molar (ethnicity). Eruption ages did not vary by household income. Median eruption ages for each of the 10 primary teeth are presented.


CONCLUSIONS
This study provides contemporary median eruption ages for primary teeth.
Psoter
Walter J
WJ
Department of Epidemiology and Health Promotion, New York University College of Dentistry, New York, NY, USA. wp9@nyu.edu
Morse
Douglas E
DE
Pendrys
David G
DG
Zhang
Heping
H
Mayne
Susan T
ST
D000367:Age Factors; D001130:Arizona; D002675:Child, Preschool; D005260:Female; D006630:Hispanic or Latino; D006801:Humans; D007182:Income; D007223:Infant; D016015:Logistic Models; D008297:Male; D012016:Reference Values; D012737:Sex Factors; D014078:Tooth Eruption; D014094:Tooth, Deciduous; D044465:White People