Resumo

ZMENER, Osvaldo. Persistent periradicular lesions. Narrative review. Rev. Asoc. Odontol. Argent. [online]. 2022, vol.110, n.3, pp.7-7.  Epub 01-Dez-2022. ISSN 2683-7226.  http://dx.doi.org/10.52979/raoa.1101251.1210.

The persistence of periradicular lesions after endodontic treatment is a problem that requires the doctor to have a thorough knowledge of the histophysiology and histopathology of the root canal system, the pulp tissue and periradicular tissues (periodontium and bone); as well as always considering the possible existence of systemic alterations that can also be influencing factors. Persisting bacteria within the root canal system after treatment is one of the major and most frequent causes for the perpetuation of periradicular lesions. However, there are other possible causal factors such as the existence of untreated lateral or accessory canals, internal dentin resorption, intercommunications, cul-de-sacs or isthmuses; areas that represent a difficulty in access during instrumentation and irrigation. If the original cause is located in the periradicular area, in cases like actinomycosis, foreign-body reactions, cholesterol crystals (CRCo) and granulomas or cysts with high content of CRCo, retreatment coupled with periapical surgery is the best approach to treatment.

Palavras-chave : Actinomycosis; foreign-body reaction; persistent periradicular lesion; intra canal infection.

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