title: Detection of periimplant fenestration and dehiscence with the use of two scan modes and the smallest voxel sizes of a cone-beam computed tomography device.
abstract: OBJECTIVE
  To assess the accuracy of cone-beam computed tomography (CBCT) in periimplant fenestration and dehiscence detection, and to determine the effects of 2 voxel sizes and scan modes.
  
  
  METHODS
  One hundred titanium implants were placed in bovine ribs in which periimplant fenestration and dehiscence were simulated. CBCT images were acquired with the use of 3 protocols of the i-CAT NG unit: A) 0.2 mm voxel size half-scan (180°); B) 0.2 mm voxel size full-scan (360°); and C) 0.12 mm voxel size full scan (360°). Receiver operating characteristic curves and diagnostic values were obtained. The Az values were compared with the use of analysis of variance.
  
  
  RESULTS
  The Az value for dehiscence in protocol A was significantly lower than those of B or C (P < .01). They did not statistically differ for fenestration (P > .05).
  
  
  CONCLUSIONS
  Protocol B yielded the highest values. The voxel sizes did not affect fenestration and dehiscence detection, and for dehiscence full-scan performed better than half-scan.
authors.affiliation: Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil. sergiolinsv@gmail.com
authors.forename: Sergio Lins
authors.initials: SL
authors.lastname: de-Azevedo-Vaz
authors.forename: Karla de Faria
authors.initials: Kde F
authors.lastname: Vasconcelos
authors.forename: Frederico Sampaio
authors.initials: FS
authors.lastname: Neves
authors.forename: Saulo Leonardo Sousa
authors.initials: SL
authors.lastname: Melo
authors.forename: Paulo Sérgio Flores
authors.initials: PS
authors.lastname: Campos
authors.forename: Francisco
authors.initials: F
authors.lastname: Haiter-Neto
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D002417:Cattle; D054893:Cone-Beam Computed Tomography; D015921:Dental Implants; D007090:Image Interpretation, Computer-Assisted; D011237:Predictive Value of Tests; D012372:ROC Curve; D012272:Ribs / Q000000981:diagnostic imaging / Q000601:surgery; D012680:Sensitivity and Specificity; D013529:Surgical Wound Dehiscence / Q000000981:diagnostic imaging*; D014025:Titanium
chemical_list: D015921:Dental Implants; D014025:Titanium