Hmmm
In fact, in one of the subsequent (failed) attempts to correct his botch he had one of his teachers/professors standing over him guiding him step-by-step. Didn't help much.
OTOH, I'm not looking to taint anyone's reputation and I've seen many happy patients. I also went to him to check out my teeth. He told me that I need all four removed but I procrastinated and it's now >~7 years and no problems.