Thanks for the helpful advice T1ck. I have spent the last couple of days working on the inside of the mouth. This is the first mouth area that I have built, so it took me a while to work out.

Here is my polygon mesh for the upper and lower gums and the teeth. There are a number of 5 sided polys that I still need to sort out. And triangles as well, though I get the impression that these are less of a problem. I have modelled the teeth seperately as suggested. I am assuming that this is because they will have their own material and texture.