Root canal therapy is highly effective, with most treated teeth going on to last for several decades or even a lifetime. However, in rare cases, a treated tooth can become reinfected or fail to heal properly. That said, since the tooth was already treated, it can be difficult to know whether new or lingering symptoms are simply part of normal healing or a sign that something has gone wrong. Here are some key signs of a failed root canal to watch for, along with what your next steps are.
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