title: Extraoral Retrograde Root Canal Filling of an Orthodontic-induced External Root Resorption Using CEM Cement.
abstract: Inflammatory external root resorption (IERR) after orthodontic treatments is an unusual complication. This case report describes a non-vital maxillary premolar with symptomatic extensive IERR (with a crown/root ratio of 1:1) after receiving orthodontic treatment. The first appointment included drainage, chemo-mechanical preparation of the canal and intra-canal medication with calcium hydroxide (CH) along with prescription of analgesic/antibiotic. The subsequent one-week follow-up revealed the persistence of symptoms and formation of a sinus tract. Finally, extraoral endodontic treatment was planned; the tooth was atraumatically extracted and retrograde root canal filling with calcium enriched mixture (CEM) cement was placed followed by tooth replantation. Clinical signs/symptoms subsided during 7 days postoperatively. The sinus tract also resolved after one week. Six-month and one-year follow-ups revealed complete healing and a fully functional asymptomatic tooth. This case study showed favorable outcomes in a refractory periapical lesion associated with orthodontically induced extensive IERR. The chemical as well as biological properties of CEM cement may be a suitable endodontic biomaterial for these cases.
authors.affiliation: Iranian Center for Endodontic Research, Research Institute of Dental sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran;
authors.forename: Sanam
authors.initials: S
authors.lastname: Kheirieh
authors.affiliation: Dental Research Center, Research Institute of Dental sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mahta
authors.initials: M
authors.lastname: Fazlyab
authors.affiliation: Iranian Center for Endodontic Research, Research Institute of Dental sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran;
authors.forename: Hassan
authors.initials: H
authors.lastname: Torabzadeh
authors.affiliation: Dental Research Center, Research Institute of Dental sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mohamad Jafar
authors.initials: MJ
authors.lastname: Eghbal
keywords: CEM Cement; Calcium Enriched Mixture; Endodontics; External Inflammatory Root Resorption; Intentional Replantation; Oral Surgery; Orthodontics; Root Resorption