Which set of permanent teeth is most commonly erupted by the age of 9?

Explanation

By age 9, permanent teeth that have typically erupted include the first molars (tooth 6), central and lateral incisors (teeth 1 and 2) in all quadrants. Other teeth such as premolars and second molars usually erupt later, while third molars (wisdom teeth) erupt much later or not at all during this age.