title: Morphometric analysis of mandibular trabecular bone using cone beam computed tomography: an in vitro study.
abstract: OBJECTIVE
  Recently, cone beam computed tomography (CBCT) was developed and applied to presurgical imaging for dental implant treatment. Because the values obtained from CBCT images are not absolute values, unlike the Hounsfield units obtained by medical CT, the relationship between the values of trabecular bone morphometry obtained in small-volume CBCT images and CT values obtained from multislice CT was evaluated in an in vitro study.
  
  
  METHODS
  Small-volume CBCT and multislice CT were performed in the posterior mandible. Subsequently, morphometric analysis of the trabecular bone in CBCT images was performed using three-dimensional bone morphometry software, and the correlations between the trabecular bone volume per total tissue volume (BV/TV) obtained using CBCT images and CT values generated from multislice CT images were analyzed.
  
  
  RESULTS
  BV/TV ranged from 3.1% to 42.7%, with a mean of 20.4% (SD: 11.4) when the setting was 0.5 for the threshold. The correlations between BV/TV using the threshold values ranged from 0.3 to 0.7, and CT values showed a high level of correlation (range: 0.83 to 0.93).
  
  
  CONCLUSIONS
  The trabecular BV/TV was closely correlated with CT values obtained using multislice CT images. It was suggested that the trabecular BV/TV can be used to evaluate the density of mandibular cancellous bone in dental implant treatment.
authors.affiliation: Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan. mune@dpc.aichi-gakuin.ac.jp
authors.forename: Munetaka
authors.initials: M
authors.lastname: Naitoh
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Aimiya
authors.forename: Akiko
authors.initials: A
authors.lastname: Hirukawa
authors.forename: Eiichiro
authors.initials: E
authors.lastname: Ariji
mesh_terms: D000539:Alveolar Process / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D002508:Cephalometry / Q000295:instrumentation; D054893:Cone-Beam Computed Tomography; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D006801:Humans; D008334:Mandible / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D010347:Patient Care Planning; D019252:Radiography, Dental, Digital / Q000295:instrumentation* / Q000379:methods; D012015:Reference Standards
chemical_list: D015921:Dental Implants