Why do teeth that have had “root canals” need crowns?
ANot all teeth that have had “root canals” need crowns. If a crown is indicated, it is generally because the restoration(filling) on the tooth is too large and it will probably fracture under normal function. Also, after a tooth has had a root canal, it becomes more brittle because there is no longer a blood supply to the tooth. This brittle nature could predispose the tooth to fracture. A crown would help to alleviate this problem.
