title: [The causes of post-endodontic failure: a descriptive analysis of a population of 198 cases of surgical retreatment].
abstract: In this article, a statistical analysis describes 198 cases of post-endodontic failures referred from private practitioners for surgical retreatments. Biopsies of these lesions showed that 68.18 per cent of them were identified as apical granulomas, 3.5 per cent as cysts, 16.16 per cent as epitheliated granulomas and 12.12 per cent as "other" cases. The two main groups of causes associated with these failures are: technical errors (55.05 per cent of the cases) and procedural mistakes (17.68 per cent).
authors.affiliation: Section en Endodontie, Université Laval, Québec, QC.
authors.forename: M A
authors.initials: MA
authors.lastname: Morand
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010484:Periapical Granuloma / Q000209:etiology; D011842:Radicular Cyst / Q000209:etiology; D012390:Root Canal Therapy / Q000009:adverse effects* / Q000706:statistics & numerical data; D014070:Tooth
vernacular_title: Etude sur les causes d'échecs post-endodontiques: une analyse descriptive d'une population de 198 cas de retraitements chirurgicaux.