You are correct that dentures aren't covered.  But if you think the $96.30 that you pay for part B is anywhere close to what the premium is you are crazy.  Medicare asks you to pay this because 1) they are broke and 2) so that you will value it a little.  you ever notice if you give somebody something for long enough they begin to feel entitled?   Even with your small contribution (which is less than 1 tenth of what the premium would be w/o medicare) you feel entitled.