Finding Free Dental Assistance for Veterans?

I can't afford to remove a molar lying on my jawbone. I is 4000.00 plus. However I found a dentist who made me a lower denture that looks great except that with cuts on my tongue and multiple abrasions under my tongue I am unable to shallow. It is too unbearable for me to use them longer than an hour. I have dental insurance with the VA, but they can't help. Any suggestions? I am 77 years old and not ill at this time, however I need to eat to stay alive. I am so very depressed. I forgot to tell you I spent 5000.00 for the upper bridge thus the reason I cannot pay for the lowers. I am still paying the bank back for the bridge.

Thanks for your reading this.