Q. Hello Dr, Solanki, I had root canal treated on # 14, and placed a crown. This was 3 yrs ago, then I had lump on the gum line and an other doctor found that the treatment wasnt done proplery and there was still a portion of nerve left.So the Crown was removed and the root canal was done again three weeks ago. Now I need to get a permanent filling and crown. Now my question is, is there a possibility that I would need an other crown and wouldnt be able to use the existing one. The crown is in good condition, and I havent had any issues all these years.It;s a porcelein crown with a metal inside.