. During cleaning and shaping of the root canals,file breakage is one of the most comon procedural aacidents which can occur.Broken file in root canal may or may not cause pain later on. If the root canals are cleaned and sterilized before the endodontic file gets broken, then broken file doesn’t usually cause any symptoms. If endodontic instrument is broken before the canals are sterilized, then it has to removed before filling of root canals . If broken file is not removed, then it can lead to pain and infection later on. Mild to severe pain or edema in gums surrounding involved tooth after root canal procedure suggests failure of root canal treatment. If file is not removed and canal is filled, then patient may experience pain months or years after root canal treatment. Pathology beyond broken file can cause pain and infection later on.
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