Dr. Herstig is a specialist in the area of endodontics and has been practicing for more than 35 years serving patients and colleagues by providing endodontic care consistent with our mission statement. We look forward to working with you at either our Columbus or Lancaster office.. Endodontics is the dental science that deals with the causes,diagnosis,prevention and treatment of diseases of the dental pulp. An endodontist,as Dr. Herstig,is a dentist who has continued his/her education and expertise to specialize in issues related to the root of the tooth. If you have a tooth that has already had a root canal and you are experiencing symptoms,there are options as far as treatments available. You would be scheduled in our office first for a consultation/evaluation in order to determine and review the best course of treatment in your individual case.