Explain the radiographic failure of root canal treatment, Biology

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Explain the Radiographic Failure of Root Canal Treatment

It is the persistence or development of pathosis radiographically. Specifically, this is a radiolucent lesion that has remained the same, has enlarged, or has developed since treatment.

Nonfunctional, symptomatic teeth with or without radiographic lesions are considered failure (nonhealed).

 

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Failure:

A. Apparently adequate root canal treatment. Tooth was restored later w/ a post & core and crown.  

B. The patient reports persistent discomfort after 2 years. Periradicular radiolucency indicates failure, probably a result of coronal leakage at a defective margin (arrow). Surgery was required (root-end resection and filling) because of restoration.


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