title: [Diagnostic value of dental implants in the posterior maxilla using cone beam computed tomography].
abstract: OBJECTIVE
  To compare the diagnostic value of cone beam computed tomography (CBCT) with orthpantomography(OPG) for dental implants at the posterior maxilla.
  
  
  METHODS
  75 patients (89 positions) with dental implants in the posterior maxilla were assessed with CBCT and orthopantomography. The horizontal height from the top of the alveolar bone to the floor of sinus was measured through CBCT and OPG. The results were processed statistically with SPSS 11.5 software package for Chi-square test.
  
  
  RESULTS
  Bone deficiency was detected in 30.34% and 16.85% cases by CBCT and OPG respectively with significant difference(P=0.034). Bone osteointegration was detected in 4.95% and 11.88% cases with CBCT and OPG respectively without significant difference(P=0.413).
  
  
  CONCLUSIONS
  The quantity of bone could be evaluated more precisely by CBCT than OPG. The peri-implant bone could be demonstrated more clearly by CBCT than OPG.
authors.affiliation: Department of Radiology, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China.
authors.forename: Lin-Feng
authors.initials: LF
authors.lastname: Fan
authors.forename: Xiao-Gang
authors.initials: XG
authors.lastname: Pan
authors.forename: Yi-Ping
authors.initials: YP
authors.lastname: Pu
authors.forename: Hong-Chang
authors.initials: HC
authors.lastname: Lai
mesh_terms: D000539:Alveolar Process / Q000000981:diagnostic imaging*; D054893:Cone-Beam Computed Tomography; D015921:Dental Implants; D006801:Humans; D008437:Maxilla / Q000000981:diagnostic imaging
chemical_list: D015921:Dental Implants