Redoing new crowns to fit in exisiting removable partial denture is difficult, but can be done, although the fitness is not as good as original one. If your dentist can not solve the problem, you may need to find another dentist to do the job. Probably not many dentists are willing to do this kind of work.
it sounds to me like there is a problem here...I mean, really, if all the teeth but the crowns were your normal teeth and they made an impression, would they then say that you had to have the real teeth removed to accommodate badly done crowns? I think not...he doesn't want to fix this, and needs to..my dentist does back flips to make all his patients happy, there is something drastically wrong when they are trying to scam you for more money due to their accidental or deliberate mistake. print this off and take it to him, I may not be a dentist, but I can smell a scam a mile off.