A 5-year-old child has all four first permanent molars (#3, #14, #19, #30) already erupted. What does this finding indicate about the child's dental development?

Correct answer: C. The child's dental (biological) age is AHEAD of their chronological age

• A. A 5-year-old with all first permanent molars erupted is ahead of the expected timeline (6–7 years) — the dental age does NOT match the chronological age; it is advanced.
• B. Behind chronological age would mean delayed eruption — the opposite of what is described.
• C. CORRECT. The first permanent molars typically erupt around 6–7 years of age. If a 5-year-old has ALL FOUR first permanent molars already erupted, their dental development is ADVANCED beyond what is expected for their chronological age. Dental age (determined by tooth eruption and development) is AHEAD of chronological age in this child.
• D. First permanent molars are normally present in each person (not supernumerary). All four erupting early represents accelerated development, not extra teeth.