Oh yes I strongly suggest that you want to go to a place that specializes cancer and has lots of oral cancer experience. A quick search leads to:
http://www.uhn.ca/PrincessMargaret/...axillofacial_Prosthetics/Pages/team.aspxI'm sure there are more that you'll quickly find. Would you take your deep sea regulator to a less experienced shop for even, lets say, calibration? Tom (my diving days are behind me but I'll bet your's are not))