laser downtime preventiondental lab integrationmachine recoveryGendex no imagedigital impression hardware issuesIvoclar Vivadent repairCAD CAM workflowhandpiece repair complexitydental clinic Gendex repair choicedental scanner transport issuesendodontic diagnosticsregular calibration DEXIS X-raycompact scanner maintenanceGendex GXS-700 errorVatech calibration importance
