Which of the following are the first incisors to erupt in an infant –
4-7 months old: The first baby teeth usually begin to break through (erupt) the gums at around 6 months old.
This can occur anywhere between four and seven months.
As a general rule, the first teeth to erupt are the two in the front bottom.
These are called the lower central incisors.
Lower central
Lower lateral
Upper central
Upper lateral