title: Applying extrusive orthodontic force without compromising the obturated canal space.
abstract: BACKGROUND
  Complicated tooth fractures can be the unfortunate result of orofacial trauma and can offer a therapeutic challenge for the dentist. A conservative solution for gaining supragingival sound tooth structure often includes orthodontic forced eruption. Usually, this procedure is carried out by applying extrusive force after placing a provisional acrylic Richmond crown on the tooth. However, this long-lasting dental treatment may jeopardize the coronal seal of the root canal space, leading to microleakage and endodontic failure.
  
  
  METHODS
  Orthodontic forced eruption demands application of force to an attachment connected to the remaining short clinical crown. In this article, the authors describe a case in which they used a new technique for orthodontic forced eruption of a traumatized tooth, using an extracanal attachment to apply extrusion force, and discuss its possible advantages and limitations.
  
  
  CONCLUSIONS
  An extracanal attachment approach for orthodontic forced eruption without compromising the obturated canal space can be a solution for posttraumatic crown fracture. Practical Implications. The described procedure for forced eruption by using an extracanal pin attachment is efficient and convenient and does not require the clinician to apply force directly to the provisional crown. Therefore, during the application of force, there is less risk of loosening the provisional crown, and the canal space is kept intact with either the final restoration or dressing material.
authors.affiliation: When this article was written, Dr. Keinan was the head, Department of Endodontics, Medical Corps, Dental Center, Sheba Medical Center, Tel-Hashomer, Israel. iendo4u@gmail.com
authors.forename: David
authors.initials: D
authors.lastname: Keinan
authors.forename: Jerard
authors.initials: J
authors.lastname: Szwec
authors.forename: Avital
authors.initials: A
authors.lastname: Matas
authors.forename: Joshua
authors.initials: J
authors.lastname: Moshonov
authors.forename: Oded
authors.initials: O
authors.lastname: Yitschaky
mesh_terms: D001696:Biomechanical Phenomena; D003442:Crowns; D003789:Dental Pulp Exposure / Q000628:therapy; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000293:injuries*; D008297:Male; D016382:Orthodontic Appliance Design; D050793:Orthodontic Extrusion / Q000295:instrumentation / Q000379:methods*; D011176:Post and Core Technique / Q000295:instrumentation; D012390:Root Canal Therapy / Q000379:methods; D012865:Skiing / Q000293:injuries; D019228:Tooth Crown / Q000293:injuries; D014082:Tooth Fractures / Q000628:therapy*; D014092:Tooth Root / Q000293:injuries; D019553:Tooth, Nonvital / Q000628:therapy*; D055815:Young Adult
keywords: Forced eruption; crown-root fracture; dental trauma; orthodontic extrusion