title: The effects of different restorative materials on the detection of approximal caries in cone-beam computed tomography scans with and without metal artifact reduction mode.
abstract: OBJECTIVE
  The aim of this study was to investigate the influence of artifacts produced by different restorative materials on the detection of approximal caries in cone-beam computed tomography (CBCT) scans with and without the application of an artifact-reduction (AR) option.
  
  
  METHODS
  Ninety-eight noncavitated premolar and molar teeth were placed with approximal contacts consisting of 2 sound or carious teeth and 1 mesial-occlusal-distal restored tooth with resin-modified glass-ionomer cement (RMGIC), amalgam, composite, ceramic-based composite (CBC), or computer-aided design-computer-aided manufacturing (CAD-CAM) zirconia materials in between. The teeth were scanned with a CBCT system with and without the AR option. Images were evaluated by 2 observers. The teeth were histologically evaluated, and sensitivity, specificity, and areas under the receiver operating characteristic (ROC) curve were calculated according to the appropriate threshold.
  
  
  RESULTS
  Specificity and sensitivity values for contact surfaces ranged from 0-48.39 and 82.93-98.40, respectively. The AR option affected (P < .05) approximal caries detection of the amalgam, composite, CAD-CAM, and CBC groups in contact surfaces and composite and RMGIC groups in noncontact surfaces.
  
  
  CONCLUSIONS
  Artifacts produced by different restorative materials could affect approximal caries detection in CBCT scans. Use of the AR option with CBCT scans increases the accuracy of approximal caries detection.
authors.affiliation: Department of Restorative Dentistry, Abant Izzet Baysal University Faculty of Dentistry, Bolu, Turkey. Electronic address: Fkahveci61@hotmail.com.
authors.forename: Fatma
authors.initials: F
authors.lastname: Cebe
authors.affiliation: Department of Dentomaxillofacial Radiology, Gaziantep University Faculty of Dentistry, Gaziantep, Turkey.
authors.forename: Ali Murat
authors.initials: AM
authors.lastname: Aktan
authors.affiliation: Department of Restorative Dentistry, Gaziantep University Faculty of Dentistry, Gaziantep, Turkey.
authors.forename: Abdul Semih
authors.initials: AS
authors.lastname: Ozsevik
authors.affiliation: Department of Dentomaxillofacial Radiology, Akdeniz University, Faculty of Dentistry, Antalya, Turkey.
authors.forename: Mehmet Ertugrul
authors.initials: ME
authors.lastname: Ciftci
authors.affiliation: Department of Restorative Dentistry, Gaziantep University Faculty of Dentistry, Gaziantep, Turkey.
authors.forename: Hatice Derya
authors.initials: HD
authors.lastname: Surmelioglu
mesh_terms: D016477:Artifacts; D002516:Ceramics; D003188:Composite Resins; D017076:Computer-Aided Design; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003723:Dental Amalgam; D003731:Dental Caries / Q000000981:diagnostic imaging* / Q000628:therapy; D003793:Dental Restoration, Permanent; D005899:Glass Ionomer Cements; D006801:Humans; D066298:In Vitro Techniques; D008670:Metals; D012680:Sensitivity and Specificity; D015040:Zirconium
chemical_list: D003188:Composite Resins; D005899:Glass Ionomer Cements; D008670:Metals; D003723:Dental Amalgam; D015040:Zirconium; C028541:zirconium oxide