Female patient whose chief complaint is inability to close her lips when applying lipstick. Prosthesis delivered 2 weeks ago. Teeth described as 'too long' but good retention, comfort, and adaptation. Cannot whistle. Why can she not whistle?

Correct answer: A. Prosthesis was too bulky

• A. Correct, per the case description — the bulk of the prosthesis (rather than a VDO problem, since retention/comfort/adaptation are noted as good) is identified as interfering with proper lip seal/airflow needed for whistling.
• B. The case notes specifically state there is no mention of a vertical dimension change being the issue here — the problem relates to tooth length/prosthesis bulk affecting lip closure, not VDO.
• C. Retention is specifically noted as good in this case, ruling this out as the cause.
• D. Posterior tooth placement is not the issue identified; the problem relates to anterior tooth length/prosthesis bulk and lip closure.

Note: No mention of vertical dimension change in this case — that was not the issue. Teeth described as 'too long' preventing lip closure, separate from the whistling issue (prosthesis bulk).