Prosthodontics & Occlusion · single question
What primarily causes the gag reflex in complete denture patients?
Show answer and explanation
Correct answer: B. Overextended denture flanges or posterior borders contacting sensitive oral structures
The gag reflex in denture patients is most commonly triggered by overextension of the denture flanges or posterior border into sensitive areas — the soft palate, posterior tongue, or oropharynx. Proper border molding during impression taking and correct posterior border placement at the vibrating line prevents this complication.
- A. ❌ Inadequate palatal seal causes denture displacement/falling — not the gag reflex.
- B. ✅ Overextended flanges/posterior border contacting sensitive areas — primary cause of denture-induced gagging.
- C. ❌ Increased VDO causes esthetic and functional issues — not the primary cause of gagging.
- D. ❌ Tooth positioning affects esthetics and phonetics — not specifically the gag reflex.
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