Similar programs are clinical trials, dental grants, or "free implants for seniors". Portions of the treatment are free/covered, but there will still be an out of pocket cost.
Typically, 90% of patients do some kind of financing to pay for their teeth. It depends on their credit or the credit of their co-signer. Usually, it needs to be around 680-720 for decent terms. Insurance does not do much to help afford the teeth portion.