Three years ago my dentist performed a root canal on a bicuspid and sent me to an Endodontist for an adjacent tooth (more complex). Recently during a Endodontics consult I was told (and shown) that both teeth were still infected; however, the nerves were dead so I didn't feel any pain. The dentist missed one canal totally and the Endodontist didn't clean out one canal completely. Neither doc is interested in fixing his mistakes but rather have the nerve to tell me that eventually ALL root canals become re-infected and I'll have to pay for secondary root canal procedures. Is this shoddy medicine OR do most root canals eventually have subsequent 'issues'?