Dr. LeClaire is very gently and seems very careful and very thorough. The greatest discomfort was not so much the procedure as having to bite down on the x-ray film frames. The treatment was not likely to be a success through no fault of Dr. LeClaire: my tooth was a bad one to begin with, and after 2 1/2 hours of Dr. LeClaire working on it, we agreed to discontinue the rootcanal, and look at other options. I'd go back to Dr. LeClaire if I needed another rootcanal.