When my regular dentist referred me to Dr O'Callahan to get an opinion on a tooth with a loose filling, she told me that I had only two options, get a root canal or get my tooth extracted. So I chose the root canal. The procedure was painful and my recovery was complicated. I wanted to second opinion so I went to another dentist and showed him my x-rays and told him what happened. He said that if I was in no pain and my pulp/nerve had no sign of inflammation, I should have gotten a pulp cap with a filling on top and saved my tooth. I would have also saved almost $3,000. I would give Dr O'Callahan a 0/5 if I could for not being honest about my treatment alternatives and failing to provide me with full informed consent, which is unethical in any healthcare practice.