endodontic problems are events 85% predictable ! Infact you can avoid them if you have a good dental higyene and you avoid grinding/clenching.

 Infact  there are other reasons of sofference to the tooth that end with a rootcanal and are not related to deep decay ! Endodontic consequences of clenching are very likely the most frequent cause of rootcanals specially in patients that have a perfect dental higiene but are anaware of the fact that they clench at night and so they cause an ischemia to the nerv of the tooth pressing on the artery that is at the end of the root and should bring oxigen to it, You can recognize that you have a endodontic problem due to clenching as you may have also a gum retraction with a "V shape " as in this picture