[MARMAM] Sea Lion Skulls

Dear List, I am a graduate student conducting research on California Sea Lions, and I need to remove the upper canines from the cleaned skulls. I am having difficulty extracting the teeth; I would prefer not to cut into the bone so that the rest of the skull remains intact. So far we have tried macerating and also using a tooth-extraction tool, but there has not been a great deal of progress as the roots are so large. Any suggestions that you may have are greatly appreciated. Thank-you, Amber Bifolck American University