title: Predetermination of root canal lengths in molar teeth: A comparison between radiovisiography and two-dimensional and three-dimensional measurements using cone-beam computed tomography.
abstract: BACKGROUND
  Obtaining a correct working length is critical to the success of endodontic therapy. The aim of this clinical study was to compare the effect of working length determination using radiovisiography (RVG) and two-dimensional (2D) and three-dimensional (3D) measurements using cone-beam computed tomography (CBCT).
  
  
  METHODS
  Thirty mandibular teeth were taken and three groups of 10 each were made. Teeth with previous endodontic treatments, metal restorations, resorptions, incomplete apex formations, and multiple visible foramina were excluded. The root canal length was determined using RVG, CBCT measurement method 2D, and CBCT measurement method 3D. The difference between CBCT measurements, RVG, and the actual canal length were compared to evaluate the accuracy of each method.
  
  
  RESULTS
  No significant statistically difference was seen with 3D measurements and actual measurements. Measurements with RVG were better than CBCT 2D.
  
  
  CONCLUSIONS
  Under experimental conditions, CBCT 3D measurements are accurate than RVG and CBCT 2D in the determination of root canal length.
authors.affiliation: Department of Conservative Dentistry and Endodontics, D. J. College of Dental Sciences and Research, Modinagar, Ghaziabad, Uttar Pradesh, India.
authors.forename: Annil
authors.initials: A
authors.lastname: Dhingra
authors.affiliation: Department of Conservative Dentistry and Endodontics, D. J. College of Dental Sciences and Research, Modinagar, Ghaziabad, Uttar Pradesh, India.
authors.forename: Charu
authors.initials: C
authors.lastname: Dayal
authors.affiliation: Department of Conservative Dentistry and Endodontics, D. J. College of Dental Sciences and Research, Modinagar, Ghaziabad, Uttar Pradesh, India.
authors.forename: Amteshwar
authors.initials: A
authors.lastname: Singh
authors.affiliation: Department of Conservative Dentistry and Endodontics, D. J. College of Dental Sciences and Research, Modinagar, Ghaziabad, Uttar Pradesh, India.
authors.forename: Neetika
authors.initials: N
authors.lastname: Bhardwaj
keywords: Cone-beam computed tomography; radiovisiography; root canal length; stereomicroscope