Colleen,
Rons obt. is made out of acrylic. The one he is now using is his first "mold". Since his surgeries and radiation from the cancer reocurrance in 2001, he is unable to open his mouth wide enough to get his denture one in so he uses the old one that doesn't have teeth built in, but does cover the whole in the roof of his mouth so he can eat.

Cacky