The nurse is preparing a presentation for a health fair illustrating the major milestones of infants as they grow and develop. Which fact should the nurse point out when illustrating an infant’s teeth?

Fluoride should not be used on a child’s teeth before 4 or 5 years of age.

Swollen or inflamed gums during teething indicate a serious concern.

The first tooth usually erupts by 6 months.

The upper incisors are most often the first teeth to erupt.