title: Failure of endodontically treated teeth: classification and evaluation.
abstract: All endodontically treated teeth that were extracted over a 1-yr period in a busy group practice were evaluated for cause of failure. The 116 teeth collected were classified into major failure categories of prosthetic, periodontic, and endodontic origin. Of the teeth, 59.4% were prosthetic failures which were due primarily to crown fracture. Teeth that had been crowned had greater longevity than uncrowned teeth. Periodontal failures constituted 32% of the study. Only 8.6% of the failures were due to endodontic causes, but these failures became evident more quickly than those in the other categories. A classification of failures is presented, and the results are analyzed.
authors.affiliation: Fort Bragg, NC.
authors.forename: D E
authors.initials: DE
authors.lastname: Vire
mesh_terms: D016301:Alveolar Bone Loss; D003442:Crowns; D006801:Humans; D010510:Periodontal Diseases; D011176:Post and Core Technique / Q000009:adverse effects*; D011475:Prosthesis Failure; D012390:Root Canal Therapy / Q000009:adverse effects*; D014082:Tooth Fractures / Q000209:etiology*; D014092:Tooth Root / Q000293:injuries