title: Intraoral Scanning Systems: Need for Maintenance.
abstract: OBJECTIVE
  This study aimed to analyze a possible gain in accuracy in intraoral scanning systems by manufacturer calibration.
  
  
  METHODS
  A master model was scanned tenfold with a Lava Chairside Oral Scanner (3m ESPE) and a CEREC Bluecam suspected to be decalibrated. Thereafter the scanners were calibrated and the model was scanned again. An iTero system served as comparison. All scans were compared to the master scan, and the mean deviation (entire arch, single tooth) was calculated.
  
  
  RESULTS
  After calibration, there was a significant gain in accuracy for both systems.
  
  
  CONCLUSIONS
  Intraoral digital scanners may be sensitive to hardware decalibration invisible to the user and therefore need maintenance.
authors.forename: Peter
authors.initials: P
authors.lastname: Rehmann
authors.forename: Viktor
authors.initials: V
authors.lastname: Sichwardt
authors.forename: Bernd
authors.initials: B
authors.lastname: Wöstmann
mesh_terms: D002138:Calibration; D017076:Computer-Aided Design; D003761:Dental Impression Technique / Q000295:instrumentation*; D061827:Dimensional Measurement Accuracy; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D003765:Models, Dental; D055096:Optical Devices