Every 6 months or so at the moment because work pays for it so I keep regular appointments. I had my wisdom teeth taken out last year after many years of pain because I couldn't afford to go.
I think dental work is FAR too expensive and inaccessible to those with not much money. In my younger years I should have gone many times but just couldn't afford it and couldn't get assistance to go. Makes me wonder how many kids over the age of 9 or 10 (after the age limit for free dental work) suffer bad teeth because their parents can't afford to have work done for them.