POSTERIOR PALATAL SEAL ADAPTATION - INFLUENCE OF A HIGH EXPANSION STONE

In this follow-up investigation, the ability of a new, high expansion stone to reduce acrylic resin denture base processing distortions was studied and compared with a previously reported investigation of bases processed on buff stone. Denture bases were processed by the continuo us-injection and trial-pack techniques on flat vault palate casts and then trimmed and polished. Measurements were made at the posterior pal atal border opening at 1 day and 1 week immersion in water (23 degrees C). Results showed that denture bases processed on high expansion sto ne had better posterior palatal seal adaptation compared with those pr ocessed on buff stone, independent of processing techniques.