MB2 Dental continues expansion in its home state with the addition of Karr and Hardee Dentistry in Amarillo, TX. Twenty-one years ago, Dr. Thomas Karr and Dr. Clint Hardee opened Karr and Hardee Dentistry. Dr. Karr also served as the Texas Academy of General Dentistry President from 2000 to 2001. He is the only dentist in the Panhandle to have led this organization. Read more.