Call any frum dentist and ask them if they have a patient that is in desperate need of dentistry but are not doing it because the can not afford it. I have a friend who paid for braces for a 14 y.o daughter of a divorcee’ whose x-husband is a dead beat dad..
This allowed the girl to gain self confidence, as she is no longer hiding her smile, and eventually will help her in shidduchim
Im guessing every dentist has a few situations like that.