Journal article

Genetic modeling of primary tooth emergence: a study of Australian twins.

Bockmann M, Hughes T, Townsend G ...see all

Twin research and human genetics : the official journal of the International Society for Twin Studies, vol. 13, issue 6 (2010) pp. 573-81

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The aim of this study was to quantify contributions of genetic and environmental factors to variation in timing of emergence of the primary teeth in a sample of monozygotic and dizygotic twins, using univariate model-fitting approaches. The sample comprised 94 pairs of monozygotic twins and 125 pairs of dizygous twins, all of European ancestry, aged from 2-6 years. Tooth emergence timing was based on parental report, with a subset of data validated by clinical assessment. Heritability estimates for tooth emergence timing were generally high, around 90%, however estimates for the lower right lateral incisor and the lower canines were around 50%. These findings confirm a strong genetic influence on observed variation in the timing of emergence of the human primary teeth.

Author-supplied keywords

  • Australia
  • Child
  • Deciduous
  • Deciduous: physiology
  • Dizygotic
  • Dizygotic: genetics
  • Female
  • Genetic
  • Humans
  • Male
  • Models
  • Monozygotic
  • Monozygotic: genetics
  • Preschool
  • Tooth
  • Tooth Eruption
  • Tooth Eruption: genetics
  • Twins

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  • Michelle R Bockmann

  • Toby E Hughes

  • Grant C Townsend

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