Help my daughter save her smile

There is nothing harder than not being able to help your child when there is something physically wrong. Approximately a year ago my daughter Jessi, who has had regular dental checkups since she was small, started getting cavities. She was going to the dentist every week and more cavities kept showing up. About 6 months later she was diagnosed with a massive Vitamin D deficiency and given a prescription for 50,000 iu's of Vitamin D once a week. However, the cavities continued. Recently she was told that her insurance will no longer pay unless she has all of her teeth removed and replaced 2 months later with dentures. Jessi is 28 years old and the thought of going through months with no teeth is not an option. Neither is it necessary, according to her new dentist that she started seeing. Tomorrow she is having oral surgery, which the insurance is paying for, to have 6 molars removed. Following that will be another bunch of cavities to fill, 2 root canals, and 12 caps for her front teeth. The cost of this is unbelievably high, approximately $15,000.-$20,000. I am asking you as a father to please help my daughter Jessi regain her beautiful smile.