title: Effect of Time Lapse on the Diagnostic Accuracy of Cone Beam Computed Tomography for Detection of Vertical Root Fractures.
abstract: Accurate and early diagnosis of vertical root fractures (VRFs) is imperative to prevent extensive bone loss and unnecessary endodontic and prosthodontic treatments. The aim of this study was to assess the effect of time lapse on the diagnostic accuracy of cone beam computed tomography (CBCT) for VRFs in endodontically treated dog's teeth. Forty-eight incisors and premolars of three adult male dogs underwent root canal therapy. The teeth were assigned to two groups: VRFs were artificially induced in the first group (n=24) while the teeth in the second group remained intact (n=24). The CBCT scans were obtained by NewTom 3G unit immediately after inducing VRFs and after one, two, three, four, eight, 12 and 16 weeks. Three oral and maxillofacial radiologists blinded to the date of radiographs assessed the presence/absence of VRFs on CBCT scans. The sensitivity, specificity and accuracy values were calculated and data were analyzed using SPSS v.16 software and ANOVA. The total accuracy of detection of VRFs immediately after surgery, one, two, three, four, eight, 12 and 16 weeks was 67.3%, 68.7%, 66.6%, 64.6%, 64.5%, 69.4%, 68.7%, 68% respectively. The effect of time lapse on detection of VRFs was not significant (p>0.05). Overall sensitivity, specificity and accuracy of CBCT for detection of VRFs were 74.3%, 62.2%, 67.2% respectively. Cone beam computed tomography is a valuable tool for detection of VRFs. Time lapse (four months) had no effect on detection of VRFs on CBCT scans.
authors.affiliation: Dental Research Center, Department of Oral and Maxillofacial Radiology,Dental School, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Amir
authors.initials: A
authors.lastname: Eskandarloo
authors.affiliation: Department of Oral and Maxillofacial Radiology, Dental School, Golestan University of Medical Sciences, Gorgan, Iran.
authors.forename: Amin Mahdavi
authors.initials: AM
authors.lastname: Asl
authors.affiliation: Department of Endodontics, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Jalalzadeh
authors.affiliation: Department of Pedodontics, Dental School, Golestan University of Medical Sciences, Gorgan, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Tayari
authors.affiliation: Department of Anatomy, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Hosseinipanah
authors.affiliation: Department of Epidemiology & Biostatistics, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Javad
authors.initials: J
authors.lastname: Fardmal
authors.affiliation: Dental Research Center, Department of Oral and Maxillofacial Radiology,Dental School, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Abbas
authors.initials: A
authors.lastname: Shokri
mesh_terms: D000818:Animals; D054893:Cone-Beam Computed Tomography / Q000592:standards*; D004285:Dogs; D008297:Male; D012680:Sensitivity and Specificity; D013996:Time and Motion Studies; D014082:Tooth Fractures / Q000000981:diagnostic imaging*; D014092:Tooth Root / Q000293:injuries*