title: Accuracy of intraoral radiography, multidetector helical CT, and limited cone-beam CT for the detection of horizontal tooth root fracture.
abstract: OBJECTIVE
  The accuracies of intraoral radiography (IOR), multidetector helical computerized tomography (MDHCT) at slice thicknesses 0.63 mm and 1.25 mm, and limited cone-beam computerized tomography (LCBCT) were compared for detection of horizontal tooth root fracture.
  
  
  METHODS
  In 7 beagle dogs, 28 maxillary anterior teeth were used, of which 13 had artificially induced horizontal root fracture. The specimens were examined by the above-mentioned 4 modalities. Diagnosis of root fracture was based on direct visualization of radiolucent line in each image by 6 radiologists.
  
  
  RESULTS
  Sensitivity, negative predictive value, and diagnostic accuracy (true positives + true negatives) for detecting fracture lines in LCBCT (0.96 +/- 0.04, 0.97 +/- 0.03, 0.93 +/- 0.04, respectively) were significantly higher than MDHCT at 0.63 mm (0.76 +/- 0.09, 0.8 +/- 0.05, 0.8 +/- 0.05, respectively), MDHCT at 1.25 mm (0.49 +/- 0.09, 0.66 +/- 0.04, 0.69 +/- 0.05, respectively), and IOR (0.51 +/- 0.18, 0.67 +/- 0.08, 0.69 +/- 0.08, respectively). Specificity and positive predictive value showed no significant intermethod difference among the 4 modalities.
  
  
  CONCLUSIONS
  Limited cone-beam CT is more useful than the other 3 radiographic modalities for diagnostic imaging of horizontal tooth root fracture.
authors.affiliation: Department of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan. machapy@m.tains.tohoku.ac.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Iikubo
authors.forename: Kaoru
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Akira
authors.initials: A
authors.lastname: Mishima
authors.forename: Shinji
authors.initials: S
authors.lastname: Shimoda
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Daimaruya
authors.forename: Chinami
authors.initials: C
authors.lastname: Igarashi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Imanaka
authors.forename: Masao
authors.initials: M
authors.lastname: Yuasa
authors.forename: Maya
authors.initials: M
authors.lastname: Sakamoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Sasano
mesh_terms: D000818:Animals; D054893:Cone-Beam Computed Tomography; D004285:Dogs; D011861:Radiography, Dental / Q000379:methods*; D012680:Sensitivity and Specificity; D036542:Tomography, Spiral Computed; D014082:Tooth Fractures / Q000000981:diagnostic imaging*; D014092:Tooth Root / Q000000981:diagnostic imaging / Q000293:injuries*