My grandmother is in desperate need of dental work. She needs several teeth extracted. Its causing her a lot of discomfort, but her medicare insurance doesn't cover dental. She is trying to save up money to get them pulled, but its taking awhile due to her limited income.
AARP plans did have a few levels of coverage. I dropped mine after doing a cost/benefit analysis and determining it wasn't worth the cost.
My father does have it though; his dental needs are different. His cost is about $173/quarter.
Before I purchased that coverage, I also compared other plans and found the AARP plan provided the most coverage for the cost.
Blue Cross has some plans, but I wasn't that impressed with them at the time.
Another option is community colleges or colleges with dental programs.
If you have a senior center in your area, contact them and ask (a) if they know of any plans (b) if they're having a senior expo this year. These centers can be very resourceful, as can the Area Agency on Aging.
One of the community colleges always has a booth at a local senior health expo with information on its clinic's discount services. I don't know if extractions would be covered though.