title: Radiographic detection of artificially created horizontal root fracture using different cone beam CT units with small fields of view.
abstract: OBJECTIVE
  To compare limited cone beam computerized tomography (CBCT) units with different field of views (FOVs) and voxel sizes in detecting artificially created horizontal root fracture (HRF) in extracted human teeth.
  
  
  METHODS
  Artificial HRF was created in the horizontal plane in 40 teeth. Another 40 intact teeth served as a control group. 80 teeth were placed in the respective maxillary anterior sockets of a human dry skull in groups. Six image sets were obtained: (1) Accuitomo 170, 40 × 40 mm FOV (0.080 mm(3)); (2) Accuitomo 170, 60 × 60 mm FOV (0.125 mm(3)); (3) Kodak 9000, 50 × 37 mm FOV (0.076 mm(3)); (4) Kodak 9000, 50 × 37 mm FOV (0.100 mm(3)); (5) Vatech Pax-Duo3D 50 × 50 mm FOV (0.080 mm(3)) and (6) Vatech Pax-Duo3D 85 × 85 mm FOV (0.120 mm(3)). Images were evaluated twice by five observers. Kappa values were calculated for observer agreement. Areas under the receiver operating characteristic (ROC) curves (Az values) were calculated, and the Az values for each image type were compared using t-tests (α = 0.05).
  
  
  RESULTS
  Intraobserver kappa coefficients ranged from 0.81 to 0.95 for the Accuitomo 170 images, from 0.80 to 0.92 for the Kodak 9000 images and from 0.76 to 0.95 for Vatech PanX-Duo3D. The Az values for different image types and observers ranged from 0.93 to 0.97 for Accuitomo 170 images, from 0.93 to 0.98 for Kodak 9000 images and from 0.93 to 0.97 for the Vatech PanX-Duo3D images. No statistically significant differences (p > 0.05) were found between the Az values.
  
  
  CONCLUSIONS
  Limited CBCT units performed similarly in detecting simulated HRF.
authors: Department of Dentomaxillofacial Radiology, Ankara University, Ankara, Turkey. dtkivo@yahoo.com
authors: K
authors: K
authors: Kamburoglu
authors: B
authors: B
authors: Onder
authors: S
authors: S
authors: Murat
authors: H
authors: H
authors: Avsever
authors: S
authors: S
authors: Yüksel
authors: C S
authors: CS
authors: Paksoy
mesh_terms: D019540:Area Under Curve; D054893:Cone-Beam Computed Tomography / Q000379:methods* / Q000706:statistics & numerical data; D003743:Dental Enamel / Q000000981:diagnostic imaging; D003782:Dental Pulp / Q000000981:diagnostic imaging; D003804:Dentin / Q000000981:diagnostic imaging; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods* / Q000706:statistics & numerical data; D008437:Maxilla / Q000000981:diagnostic imaging; D015588:Observer Variation; D011237:Predictive Value of Tests; D012372:ROC Curve; D011856:Radiographic Image Enhancement / Q000379:methods; D012680:Sensitivity and Specificity; D014082:Tooth Fractures / Q000000981:diagnostic imaging*; D014092:Tooth Root / Q000293:injuries*; D020390:Tooth Socket / Q000000981:diagnostic imaging