Abstract
Root canal treatment can last for lifetime, but in case of any recurrent infection and procedural errors endodontic retreatment can save a tooth. Whenever possible it is best to save a natural tooth. In some cases even when treatment has followed the highest standards it still results in endodontic failure. Endodontic failure results from persistent or secondary intra-radicular infection. Extra-radicular infections may be implicated in the failure of some cases. The reason many teeth do not respond to root canal treatment is because of procedural errors. The purpose of this article is to discuss about etiological factors of endodontic failure, removal of gutta percha from canals and different techniques of endodontic retreatment. Keywords: Radicular infections, Overfilling, Coronal Leakage, Gutta percha, Retreatment, Endodontic failure, Curved canals, Rotary Instruments.
Highlights
Root canal treatments usually fail when treatment is inadequately done
Teeth with root canal treatment can last for a lifetime
The reason why a tooth does not respond to a root canal treatment is procedural errors and the persistence of microbial infection in the root canal system or the peri-radicular area
Summary
Root canal treatments usually fail when treatment is inadequately done. Teeth with root canal treatment can last for a lifetime. It has been theorized that the formation of the cyst cavity is originated from immunological reactions, which attack epithelium in proliferation.[8] Instruments used for removal of gutta percha in cases of endodontic retreatment The clinician can use various options for the removal of obturating material: 1. Ni Ti rotary files are very effective and efficient for removing gutta percha.
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