Providing Clayton and Raleigh, NC with Superior Dentistry. From its humble roots, this dental practice was established by Drs. Calamos and Marsh in 1981 as an after hours night practice in Raleigh, NC. The Raleigh office grew as word spread of the exceptional dental care provided by Dr. Calamos and Dr. Marsh. In 1989, the practice expanded to a then underserved Johnston County, in Clayton, NC. The practice dots what was once the main dirt road in Clayton on NC 42 leading west out of the historic downtown. Dr. Emrich joined the practice in 2004 after having been a patient since the practice opened its doors.