title: Definition and endodontic treatment of dilacerated canals: a survey of Diplomates of the American Board of Endodontics.
abstract: OBJECTIVE
  To gather data from Diplomates of the American Board of Endodontics regarding treatment of dilacerated canals.
  
  
  METHODS
  A questionnaire addressing definition, endodontic treatment procedures and prognosis was constructed and distributed via e-mail to 708 Diplomates of the American Board of Endodontics. Data from 150 respondents, a 21% response rate, were collected by using a Web-based interface. For statistical analysis, Chi-square tests were used.
  
  
  RESULTS
  More than 25% of respondents believed that a dilacerated root should have a curvature > 40°. One-visit treatment is the best therapeutic approach and transportation is the most likely complication in preparation of these canals. A crown-down technique, watch-winding motion and a master apical file # 25 are the best choices for preparation of these canals. Any warm obturation technique is preferred over lateral compaction by most respondents.
  
  
  CONCLUSIONS
  A crown-down technique for root canal preparation and a thermoplastic obturation technique are recommended for canals whose curvature is more than 40°. The prognosis of the treatment of these canals is judged not lower than normal canals.
  
  
  CONCLUSIONS
  Crown-down technique and thermoplastic obturation are recommended for dilacerated canals.
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Nafiseh
authors.initials: N
authors.lastname: Dastmalchi
authors.forename: Zeinab
authors.initials: Z
authors.lastname: Kazemi
authors.forename: Siroos
authors.initials: S
authors.lastname: Hashemi
authors.forename: Ove A
authors.initials: OA
authors.lastname: Peters
authors.forename: Hamid
authors.initials: H
authors.lastname: Jafarzadeh
mesh_terms: D002126:Calcium Hydroxide / Q000008:administration & dosage; D003786:Dental Pulp Cavity / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000293:injuries; D004708:Endodontics; D004867:Equipment Design; D004868:Equipment Failure; D006801:Humans; D020407:Internet; D009811:Odontometry / Q000295:instrumentation; D011379:Prognosis; D016300:Radiography, Bitewing; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods; D018915:Root Canal Preparation / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods; D012390:Root Canal Therapy / Q000379:methods*; D013044:Specialty Boards; D011795:Surveys and Questionnaires; D009626:Terminology as Topic; D019227:Tooth Apex / Q000000981:diagnostic imaging / Q000473:pathology; D014481:United States
chemical_list: D012387:Root Canal Filling Materials; D002126:Calcium Hydroxide