My finance had some dental work done that the dentist completely screwed up. (A procedure that she was originally told was going to take 3 weeks is now in its 7th month, and we're making an emergency trip to another dentist this afternoon because something just broke.) I want to explore legal actions against her original dentist because of all the lost wages, time, and emotional & physical suffering she's experienced as a result of this -- not to mention the additional money that is coming out of our pockets to fix what he screwed up. However, I'm wondering if the dentist has actually committed "malpractice" or if he just didn't really know what he was doing. Is there a difference between the two? What is the legal definition for medical malpractice? Is there a certain "threshold" that needs to be met? (This is taking place in Maryland, by the way.) Thanks!