What to do if my husband went to a dentist to get dentures but they don't fit right and to get them to fit right he needs to pay additional money?

  If the dentist undertook to provide your husband with dentures he agreed to give him dentures that actually fit. You should contact Medicaid and complain to them about the doctor trying to bill you. You can also file complaints with the office of the professions if you are in New York or the government agency that licenses dentists in your state.