On a panoramic radiograph of a 12-year-old patient, which tooth would be expected to erupt FIRST among those visible?

Correct answer: D. Tooth 4 (first premolar)

• A. Second premolars erupt around 11-13 years — similar timing to first premolars but often slightly later.
• B. First permanent molars typically erupt around age 6 — they would likely already be erupted in a 12-year-old.
• C. Third molars (wisdom teeth) erupt last, around ages 17-25.
• D. Correct. In a 12-year-old, the typical eruption sequence has first permanent molars already erupted. Among permanent teeth still erupting around age 12: first premolars (tooth 4 / Pd) erupt around 10-12 years, making them the next expected to erupt among those not yet visible or in eruption. The examiner should identify the least-erupted tooth that has the most completed root development.

Note: This question depends on panoramic interpretation. The recalled answer was tooth #4 (first premolar) as the next to erupt in a 12-year-old. Context and panoramic image analysis are essential.