title: Rapidly progressing extracanal invasive resorption.
abstract: Frank and Bakland coined the term "Extracanal invasive resorption" (EIR) to identify a resorptive entity that has been variously classified. This external resorption originates in the cementum adjacent to the periodontal ligament. The lesion is believed to be a response to injury and irritation of the periodontal ligament, or to pressure from ectopic eruption, orthodontic pressure, intracoronal bleaching, periodontal treatment, or an unknown idiopathic cause.
authors.affiliation: Hospital Dental Clinic, Fort Leonard Wood, Missouri, USA.
authors.forename: E S
authors.initials: ES
authors.lastname: Mock
authors.forename: G K
authors.initials: GK
authors.lastname: Wolff
authors.forename: D A
authors.initials: DA
authors.lastname: Galvan
mesh_terms: D000328:Adult; D001641:Bicuspid / Q000293:injuries; D003742:Dental Devices, Home Care / Q000009:adverse effects*; D003786:Dental Pulp Cavity; D006801:Humans; D008297:Male; D009910:Oral Hygiene / Q000009:adverse effects / Q000379:methods; D011859:Radiography; D012391:Root Resorption / Q000000981:diagnostic imaging / Q000209:etiology*; D013997:Time Factors; D019237:Tooth Cervix / Q000293:injuries