digital radiography grainy issueEnvisionTEC Vida cDLM caredental plate protectionapex locator function comparisonalgorithm optimizationmodel comparisonsensor bond wire shortTRIOS battery replacementWiFi scanner reliabilityhandheld X-ray optimization3D printing design issuesoptical motor calibrationtroubleshoot Owandy intraoral X-raytroubleshoot Acteon X-ray sensorimage irregularity troubleshooting
