This looks like a second posting asking the same question, but at least you've included your location.
As previous reponses have indicated, you should contact your insurance provider if you have dental insurance - they'll be able to tell you which dentists are included in your plan. If not, you can try google or check with one of the major university dental schools in Maryland. The internet is full of sites where patients give their views on their dentists and other medical providers.
You may also want to ask the neighbors or work colleagues - it's a good way to make new acquaintances.