iTero calibration issuesspindle bearing replacementlaser overheating preventionpreventive maintenance serviceclinical accuracychairside CAD AI workflowBien-Air Dental HandpieceCAD CAM analyticspulse energy variationdental equipment repair Torontocorner distortion fixdental X-ray sensor hub issuecalibration maintenancedental scanner belt adjustmentwhite image analysis
