Rimrock Dental Clinic is the longest continually operating dental clinic in Eastern Montana. It was first established in 1938 by Dr. James Brown Sr and Dr. Jason Roan, who has been a dentist since 1993, is the fourth dentist to practice in this same location. The staff at Rimrock Dental Clinic is well trained and excited to provide excellent, state of the art, dental care to patients of all ages. Rimrock Dental Clinic is an academic environment of learning, healing and making new friends.