Shes already pretty anal about brushing multiple times a day and she has no signs of decay, just an underbite. Ive now read up on it and I am not quite sure what I want. Basically they are putting something on her teeth to damage them to create a rough surface, and then putting the coating on them, then using the blue light to set it.. and there is a 50% failure rate within 5 years anyway? What? Is it really worth it?