Dr. Tabassian screwed my root canal and both of my crowns. I have had to spend thousands of dollars getting everything redone, including the root canal. I have had severe pain due to the poor work she did. Neither crowns lasted 2 years and both were fit so poorly that my gums became infected. Then, the root canal became abscessed due to the fact that there was about 4mm of untouched gum tissue.....the root canal didn't go far enough. It was a terrible and painful experience.