About a year ago I got a permanant bridge placed on my top teeth. Well it has fallen out several times now but when I went back it was re-cemented. Last time, The dentist made me a new one. Free of charge. Now this came loose and is able to be popped off. I paid $20,000 for this bridge. I don't know what to do. Should I be refunded a portion of my $? obviously something isn't right. Can anyone offer any advice here?