title: Volumetric Evaluation of Safe Zone for Bone Harvesting From Symphysis Region by Using Cone Beam Computed Tomography.
abstract: OBJECTIVE
  The aim of the present study was to retrospectively make a volumetric evaluation of symphysis sites of patients by the use of cone beam computed tomography (CBCT).
  
  
  METHODS
  This retrospective study evaluated dentate symphysis region of the mandibles in CBCT scans taken for different reasons in 90 patients (45 women and 45 men). Three-dimensional (3D) data were obtained using a CBCT device Kodak 9000 3D CMOS sensor with optical fiber. CBCT images were then transferred as digital imaging and communications in medicine files and imported into a volumetric-rendering software 3D DOCTOR (Able Software Corp., Lexington, MA) capable of measurements of vector based-segmentation technology for volumetric measurements.
  
  
  RESULTS
  The total average bone volume is 2616.45 mm. Significant differences in average bone volume were found between group I and group IV (P < 0.001). Higher bone volume was obtained in the male groups (2903.01 mm) than in the female groups (2329.88 mm).
  
  
  CONCLUSIONS
  CBCT is a good candidate for 3D assessment of high-contrast structures in the oral region. We suggest that the use of 3D computed tomography in combination with a software program is a dependable means of measuring the volume of the symphysis bone graft.
authors.affiliation: *Associate Professor, Department of Oral and Maxillofacial Surgery, Gulhane Military Medical Academy, Ankara, Turkey. †Resident Student, Department of Oral and Maxillofacial Surgery, Gulhane Military Medical Academy, Ankara, Turkey. ‡Associate Professor, Dentomaxillofacial Radiology, Dentistry Faculty of Ankara University, Ankara, Turkey. §Department of Oral and Maxillofacial Surgery, Gulhane Military Medical Academy, Ankara, Turkey. ¶Dentomaxillofacial Radiology, Dentistry Faculty of Ankara University, Ankara, Turkey. ‖Associate Professor, Department of Oral and Maxillofacial Surgery, Gulhane Military Medical Academy, Ankara, Turkey. #Mevki Military Hospital, Ankara, Turkey.
authors.forename: Hasan Ayberk
authors.initials: HA
authors.lastname: Altug
authors.forename: Abdullah Tugrul
authors.initials: AT
authors.lastname: Coskun
authors.forename: Kvanc
authors.initials: K
authors.lastname: Kamburoglu
authors.forename: Tamer
authors.initials: T
authors.lastname: Zerener
authors.forename: Orhan
authors.initials: O
authors.lastname: Gulen
authors.forename: Metin
authors.initials: M
authors.lastname: Sencimen
authors.forename: Aydn
authors.initials: A
authors.lastname: Ozkan
mesh_terms: D000328:Adult; D054893:Cone-Beam Computed Tomography / Q000379:methods; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008334:Mandible / Q000033:anatomy & histology / Q000000981:diagnostic imaging* / Q000601:surgery; D063175:Mandibular Reconstruction / Q000379:methods; D008875:Middle Aged; D012189:Retrospective Studies; D055815:Young Adult