Orthodontics · single question
If the buccal cusps of the maxillary molars are positioned lingually relative to their normal position, what results?
Show answer and explanation
Correct answer: D. Posterior crossbite
- A. Molar classification describes anteroposterior relationship, not transverse.
- B. Open bite is a vertical discrepancy, not a transverse one.
- C. A scissor bite is the OPPOSITE — maxillary teeth positioned entirely buccal to the mandibular teeth.
- D. Correct. When maxillary buccal cusps fall lingual to the mandibular buccal cusps, the normal buccolingual relationship reverses — this is a posterior crossbite, typically from a transverse maxillary deficiency.