I've had two root canals completed by Dr. Wittmer. He does not use nitrous oxide and I was nervous. I've got to tell you, I felt no pain - even with the initial injections. He and his team are pleasant, efficient and supportive. They go the extra mile to ensure a successful dental experience. I won't hesitate to continue to use his services. It's good to have an endodontist I can trust and I highly recommend him.