Dr. Shapiro performed a root canal which became infected a couple of days later. He refused to accept the possibility that it had, and insisted that a second tooth also needed a root canal, despite clear symptoms of an infection rather than a second bad tooth. He performed a second root canal on a perfectly healthy tooth (by his own admission), then charged me for the service and dismissed me, still untreated for the infection, saying that he "didn't know" why I was still in pain, but that it "couldn't be an infection." My own dentist finally had to resolve the situation by changing my antibiotic. Shapiro may be technically proficient, but his level of arrogance and infallibility make him supremely unfit to serve his profession.