GAG REFLEX:
1. Excess thickness of PPS (main reason)
2. Over extension of denture tray
3. Under the extension of denture tray
4. Over post dam
5. Under post dam

SYSTEMIC REASONS OF GAG REFLEX
If the patient had no gag for years after delivery of the new denture, and then recently develops the gag reflex on denture use – then suspect systemic problem & is definitely not due to the denture itself


SYMPTOMS OF OVEREXTENDED MAX DISTO-PALATAL END
1. Ulcer 2. Sure throat 3. Dysphagia