I have to agree that dental insurance is not worth it for me after doing some homework on it. Not enough payout for even the small monthly they asked for. Since I have some crowns and bridges, I'm heading south of the border or another country when it becomes implant time. Way too expensive here for that.
However, I did get dental insurance 20 years ago or so--which covered orthodontia--for my son when he needed braces that saved me about $1,500+/- if I remember right.
And the Orthodontist we used was really great having graduated from University of Texas #1 in his class (as a side note, he was a big, tall Chinese guy with a really hick Texas accent...go figure?). Anyway, we did well with that dental insurance. You have to do your homework on dental insurance savings for sure first before plunking down any money, tho. Doesn't save a penny in many cases.