Panoramic and photo showing 2 missing mandibular premolars. What dental anomaly is shown?

Correct answer: D. Transposition

• A. Fusion involves the union of two separate tooth germs, producing one larger tooth — not an explanation for 'missing' teeth that are actually transposed.
• B. Gemination is an attempted (incomplete) division of a single tooth germ, producing one tooth with two crowns — not relevant to 'missing' premolars from transposition.
• C. A supernumerary tooth is an extra tooth, the opposite finding of 'missing' teeth.
• D. Correct. Transposition occurs when a tooth erupts in the position of another (e.g., mandibular lateral incisor/canine transposition), making the expected tooth appear clinically/radiographically 'missing' from its normal position when it has actually erupted elsewhere.