Should trust funds pay for dental work? my mom has a trust fund and it is to be used for medical purposes?

After a recent visit to the dentist,i was told that i needed to have my teeth extracted and get dentures-i am already missing alot of teeth-mostly in the back-i started to lose them when i was 30,i have a defective jaw and misaligned jaw,with teeth that grew in with very thin,soft enamel and my dentist/ortho told me at 15 that i would start to lose my teeth @ 30 yrs old. This is NOT due to bad hygiene and my teeth are not black at all..I am experiencing alot of headaches and pain and have a few infections going on and i just want these teeth out-but i am not working,i am a single mom and i have no health insurance and no money -it will cost about 2500.for all this to be done-my mom has a trust,should i call them and see if they will pay for it? The trust is there for medical reasons,wouldn't this be considered medical? i am afraid they will say no-and if i call what do i say? They are very nasty when they talk to you-per my mom. shoild i try or just forget it and suffer? ty