How do senior citizens on fixed incomes afford dental services?

Dental insurance for seniors still is not cheap enough and as you get to that age your teeth need more bridges and crowns and you name it because of the age of their teeth. How do they afford it?
I am 60 and need some dental work and cannot afford it and am thankful that I am not in any pain but crowns are so expensive and dental insurance sure doesn’t cover much of the “big stuff”. This getting old is getting expensive and many are on set incomes.