Dr. Osmonoff performed a root canal which now (less than one year later!!) needs to be redone. I was informed by two endontists (root canal specialists) and two general dentists, that the root canal was not successful. Retreatment of a root canal costs at least $600 dollars more than the initial cost of the root canal. Not only was the root canal unsuccessful, the crown was not fitted well and unpleasant to the eyes. The whole procedure needs to be redone...the root canal, post, and crown!!!!