CO medical dental malpractice law, tort, dental negligence

dentist not checking with physician: I got dentures and they never have fit. My dentist says implants for $7000 is the only way to make them fit. I already have paid him $5000. I have a rare blood disease and asked him to contact my hemotologist. He did not but still insisted on implants. I quit going to him and my mouth has suffered. My hemotologist wrote it out that I am not a candidate for implants as I could have severe bleeding problems. I went to another dentist and he said the dentures aren't made to fit my mouth and wants to make new ones. How can I get my money back from the first dentist?thanks Linda