[Re-evaluation of the etiology and diagnosis of persistent periapical periodontitis].

Periapical lesions that fail to heal after root canal treatment are described using two different clinical terms that have overlapping but distinct meanings; this review examines the differences between these terms and their clinical implications to help practitioners manage such cases appropriately.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.