I went for an exam, knowing that I had a large cavity. Having a history of " bad teeth", I assumed there was a possibility the tooth may need a root canal. Being right wasn't what I had hoped for, but Dr and his staff were very comforting ( as I was crying). this being my fourth root canal in my lifetime, I thought I knew what to expect. I was wrong. I felt nothing, from the injection, through the root canal, and now a day later. He did ask repeatedly throughout the process to be sure all was well, and it was. I am very very impressed with his skill, his "bedside manner", his compassion, and his staff as well. phenomenal experience..... for a dentist appointment.