Any one of the first twenty teeth which develop in children between about six months and two and-a-half years of age, and are replaced by the permanent teeth at around the age of six.
The set of 20 teeth that push through the gums in an infant’s mouth in the first 25 to 33 months of life.
The first set of teeth to appear, also called deciduous teeth or baby teeth. The first primary teeth usually break through the gums when an infant is 6 months old, although it is not uncommon for them to appear sooner or later. The first primary teeth may appear at an earlier age in girls than in boys. Primary teeth are normally small and bright white; their roots are short and not firmly anchored in the jawbone. The enamel covering the crowns of the primary teeth is relatively thin and vulnerable tooth decay.