I have been hesitant to even use the word "insurance" in the context of dental care. To me, insurance has to have some degree of catastrophic coverage. With such low calendar-year maxes and generally non-generous coverage amounts for serious oral surgery, I really think that most of these should be called "Dental plans". They're really budget plans. Just about anyone on these forums can probably do better if they self-insure in a liquid online savings account.
That said, there are commercial products (like Dentrite) that are discount plans, but pretty much pay for themselves if you do use 2 checkups per year with bitewing X-rays. I already took my wife off of my employer's dental "insurance" and she pays for a discount plan - we're already about $1000 in the black over the past 3 years by using this strategy versus putting her on my employer plan. Then again, she has very healthy teeth.
If you have access to a FSA or HSA, even better - you can self-insure tax-free.