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Numbers of erupted primary teeth were periodically counted in 542 Chinese (Hong Kong) children from birth to three years of age. Comparison with data from other countries provides no evidence of delayed dentition. Chil­dren who were heavier or had greater crown-heel length were ahead in teeth development up to 20 months of age when compared with children smaller at birth. Positive association of dental development with weight and height at a given age was found to reflect the size at birth and was not related to differences in post-natal growth rates. There was no association of dental development with health grading, skinfold measurement or skeletal maturity.