Most endodontically treated teeth (ETT) loss its structural integrity with the access preparation, rather than changes in the dentin, which lead to a higher occurrence of fractures compared with “vital” teeth. feedback mechanism that is lost when the pulp is removed, which also may contribute to tooth fracture.

Why well treated teeth fail?

Root canal treatment usually fails when the treatment is carried out inadequately. However, there are some cases in which the treatment has followed the highest standards yet still results in failure. In most of the cases, the endodontic failure results from persistent or secondary intraradicular infection.

Why are root canal teeth more brittle?

Root canal treatment involves the complete removal of the nerve and the living tissue found in the tooth. In order for the dentists to access the pulp cavity of the tooth, they have to remove a reasonable amount of the tooth substance. This results in a weaker tooth structure.