Excerpt: If you're long in the tooth or soon to become so, AARP has plans for you. Dental plans. The nonprofit has begun marketing an insurance program in partnership with Delta Dental, whose other products cover more than 20 million people nationwide. Open to all AARP members -- anyone over 50 who pays the group's dues of $12.50 a year -- and to their dependents, the plan is aimed at people who can't buy dental coverage through an employer or other group sponsor.