Q. I perforated a canal while I was preparing it for root canal obturation. What would you do in this case?
A. In general, when a tooth is perforated, the defect should be repaired as quickly as possible to protect the periodontal attachment. From your question, I could not tell if you are dealing with an apical or midroot strip perforation. Depending on where the perforation is will determine treatment sequence. However, the material of choice to repair and seal a perforation is Mineral Trioxide Aggregate (MTA), commercially known as ProRoot. For further information regarding the mixing, delivery and placement of ProRoot, see the FAQ section of this site entitled Transportations
. In addition, I also refer you to my Ruddle on Retreatment
DVD "Management of: Blocks, Ledges, Transportations & Perforations " to explain the precise clinical technique necessary for repairing perforations.