I'd say find a dentist that owns their own building vs renting space. I've noticed dental offices working to pay rent try and charge you for crap you don't need. Also from first hand experience I would recommend staying away from big chain dentists like A*pen dental. Also be aware of dentists that use Chinese made xray equipment. That stuff can be miscalibrated and dosing you way higher. There was an article about this in the UK some time ago.