What is the most challenging aspect of fabricating complete dentures for this patient?

Correct answer: C. The super-erupted posterior teeth and the alveolar bone that has followed them

• A. Shade selection is straightforward and, in a fully edentulous case, largely a matter of patient preference guided by complexion and age. It does not threaten the prosthesis.
• B. Retained root tips are removed at the same appointment as the rest of the clearance. They are a surgical step to be scheduled, not a prosthetic obstacle.
• C. CORRECT. A tooth that over-erupts does not travel alone — it brings its ALVEOLAR BONE with it. Once those teeth are extracted, the resulting hypertrophic ridge and dropped tuberosity occupy the very INTERARCH SPACE the denture base and artificial teeth need, and the occlusal plane cannot be levelled around them. The result is inadequate restorative space, an unaesthetic and unstable prosthesis, and interference with the mandibular denture. The problem is identified on MOUNTED DIAGNOSTIC CASTS before any extraction and solved with alveoloplasty and tuberosity reduction performed at the time of the clearance. Failing to plan for it before the teeth come out is the classic and expensive error.
• D. Age alone determines nothing about denture difficulty. Ridge form, interarch space, muscle attachments, saliva and patient expectations do.

Note: The pre-prosthetic surgical checklist to run at the treatment-planning visit: alveoloplasty for irregular or knife-edge ridges, tuberosity reduction where interarch space is short, removal of tori and prominent undercuts, frenectomy where a frenum crosses the ridge crest, and excision of epulis fissuratum or papillary hyperplasia. Allow adequate healing before definitive impressions — typically four to eight weeks for soft tissue, with substantial ridge remodelling continuing for months.