Prosthodontics & Occlusion · patient case question
Approximately what proportion of the masticatory force of a natural dentition can a complete denture wearer generate?
Patient case: Three Weeks Into New Complete Dentures
Patient: 62-year-old female
Chief Complaint: “My palate burns, and I whistle when I talk.”
Background: Edentulous for 6 years. New maxillary and mandibular complete dentures delivered 3 weeks ago. She wears them 24 hours a day and has not been removing them at night. Type 2 diabetes, well controlled.
Medications: Metformin 1000 mg twice daily
Vital Signs: BP 128/76 mmHg · HR 74 bpm · RR 16 · T 98.4°F
Findings: Diffuse bright erythema of the palatal mucosa conforming precisely to the outline of the maxillary denture base, with sharp demarcation at the denture border. Maxillary anterior teeth appear prominent; she cannot produce clear “f” and “v” sounds. Small, firm, smooth, immobile sessile nodules on the lingual aspect of the mandibular alveolus bilaterally, covered by normal-appearing mucosa, which she reports have been present “for as long as I can remember.”
Show answer and explanation
Correct answer: D. 10%
- A. Incorrect. Eighty percent approaches natural dentition performance and is not attainable with any removable prosthesis.
- B. Incorrect. Fifty percent is well beyond what conventional complete dentures achieve and approaches implant-supported fixed prosthesis territory.
- C. Incorrect. Thirty percent overstates conventional denture performance. It is closer to what is achieved with an implant-retained overdenture.
- D. Correct. Complete denture wearers generate a small fraction of natural masticatory force, commonly cited as roughly one-sixth or less. Of the choices offered, 10% is the closest. The prosthesis is mucosa-borne rather than bone-anchored, and the absence of periodontal mechanoreceptors removes the feedback that permits high, controlled force.
Note: Flagged for precision. The published range is broader than the single figure suggests: masticatory performance in complete denture wearers is generally reported at 10–25% of natural dentition, with maximum bite force sometimes as low as 15%. “Less than one-sixth” is the phrase used in much of the prosthodontic literature. Given the options offered, 10% is the intended answer, but recognize the range.
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