title: Interrelationships in the Variability of Root Canal Anatomy among the Permanent Teeth: A Full-Mouth Approach by Cone-Beam CT.
abstract: OBJECTIVE
  In endodontic practice, clinicians should be aware of possible root canal anatomic variations. The aim of this study was to assess using CBCT acquisitions regarding whether one root canal anatomy of a tooth is associated with a specific anatomy of another tooth.
  
  
  METHODS
  A total of 106 CBCT acquisitions were obtained using a CBCT scanner with 200μm voxel size. Numbers of roots and canals of the entire dentition were described. Bivariate analyses and logistic regressions were conducted to explore root canal anatomy on one tooth according to age, gender, jaw, side and the others teeth. Multiple correspondence analysis (MCA) was performed to correlate the different numbers of canals profiles.
  
  
  RESULTS
  A total of 2424 teeth were analyzed. Independently from the other variables, the presence of an additional root canal on a mandibular incisor increases the risk of having an additional root canal on a mandibular premolar (OR [95%] 3.7 [1.0;13.2]). The mandibular molar variability increases in women compared to men (OR [95%] 0.4 [0.1; 0.9]). MCA showed correspondence between 2-canals maxillary incisor and canines and 5-canals maxillary molars, and some correlation between additional canal on maxillary and mandibular premolars.
  
  
  CONCLUSIONS
  Although CBCT examinations are conducted in the first intention of making a diagnosis or prognostic evaluation, medium FOV acquisitions could be used as an initial database thus furnishing preliminary evaluations and information. In endodontic practice, clinicians should be aware of possible root canal anatomic variations. The visualization of all canals is considered essential in endodontic therapy. The use of multi-correspondence analysis for statistics in endodontic research is a new approach as a prognostic tool.
authors.affiliation: Department of Anatomical Sciences and Radiology, Dental Faculty, Paul Sabatier University, Toulouse University Hospital, Toulouse, France.|STROMALab, Université de Toulouse, CNRS ERL 5311, EFS, INP-ENVT, Inserm U1031, UPS, Toulouse, France.
authors.forename: Paul
authors.identifier: http://orcid.org/0000-0002-5473-6035
authors.initials: P
authors.lastname: Monsarrat
authors.affiliation: Department of Department of Conservative Dentistry and Endodontics, Dental Faculty, Paul Sabatier University, Toulouse University Hospital, Toulouse, France.|AMIS Laboratory - Laboratoire Anthropologie Moléculaire et Imagerie de Synthèse, Université de Toulouse, UMR 5288 CNRS, UPS, Toulouse, France.
authors.forename: Bertrand
authors.initials: B
authors.lastname: Arcaute
authors.affiliation: Department of Endodontics, Arthur A. Dugoni School of Dentistry University of the Pacific, San Francisco, California, United States of America.
authors.forename: Ove A
authors.initials: OA
authors.lastname: Peters
authors.affiliation: Department of Department of Conservative Dentistry and Endodontics, Dental Faculty, Paul Sabatier University, Toulouse University Hospital, Toulouse, France.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Maury
authors.affiliation: AMIS Laboratory - Laboratoire Anthropologie Moléculaire et Imagerie de Synthèse, Université de Toulouse, UMR 5288 CNRS, UPS, Toulouse, France.|Service de Médecine Légale, Centre Hospitalier Universitaire Rangueil, avenue du Professeur Jean Poulhès, 31059, Toulouse Cedex 9, France.
authors.forename: Norbert
authors.initials: N
authors.lastname: Telmon
authors.affiliation: Department of Department of Conservative Dentistry and Endodontics, Dental Faculty, Paul Sabatier University, Toulouse University Hospital, Toulouse, France.
authors.forename: Marie
authors.initials: M
authors.lastname: Georgelin-Gurgel
authors.affiliation: Department of Department of Conservative Dentistry and Endodontics, Dental Faculty, Paul Sabatier University, Toulouse University Hospital, Toulouse, France.|AMIS Laboratory - Laboratoire Anthropologie Moléculaire et Imagerie de Synthèse, Université de Toulouse, UMR 5288 CNRS, UPS, Toulouse, France.
authors.forename: Delphine
authors.initials: D
authors.lastname: Maret
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D054893:Cone-Beam Computed Tomography; D019229:Dentition, Permanent; D005260:Female; D006801:Humans; D007568:Jaw / Q000033:anatomy & histology; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012737:Sex Factors; D014092:Tooth Root / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D055815:Young Adult