Xray here <http://tinypic.com/6scd9h.jpg> 236k.

There are several areas where the root canal therapy will require re-doing, and
suspicious activity around the roots of some key teeth. Lots of preparation work
before the fixup can happen. So I can't afford the prices and maintenance costs
to have my teeth restored with a full fixed prosthedontic job, nor can I afford
a job with some extractions and partial dentures with some key teeth crowned,
etc. So I went for full dentures with support from copings or some such devices.
I'm going in next week to discuss his treatment plan. On the phone he's
intimated that he could also do this:

Leave in the roots of a couple of canines and cover them over with the dentures.
If they're required in the future then he could add support from them. If not
needed after a while, they could be extracted.

What questions might I have ready to ask at this appointment?