Dent 150 week 1


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Dent 150 week 1

  1. 1. Dent 150 Dental Radiology Roberta Brown, RDH MS Instructor
  2. 2. Learning ObjectivesSummarize the importance of dentalradiographyList the uses of dental radiographsBriefly summarize the discovery anddevelopment of x-radiationIdentify the pioneers in radiology, theircontributions and discoveriesDiscuss the knowledge and skillrequirements of the dental radiographer
  3. 3. More Learning Objectives…Define ‘radiation’, ‘x-radiation’, ‘radiograph’and ‘dental radiographer’Identify the differences between extraoraland intraoral radiographyIdentify the component parts of anintraoral dental x-ray machineDescribe the purpose and use of dental x-ray film holders and devices
  4. 4. A Little HistoryWilhelm ConradRoentgenNovember 8, 1895Accidental Created rays that caused materials to glow Traveled several feet Made first x-ray image “X” = unknownProfound implications
  5. 5. The First X-RayTaken ofRoentgen’swifeExposedfor 15MINUTES!
  6. 6. Dental RadiographyOtto Walkhoff– German Dentist– Intraoral radiograph on himself– 25 minute exposure timeEdmund Kells– First dental radiographs on live patientsWilliam H. Rollins– Radiation safetyHoward R. Raper– First university course on radiation for dental students (1909)
  7. 7. Unknown DangersExposure times werevery longNobody knew thedangersEarly pioneers in thefield suffered lose offingers, hands andlife
  8. 8. Dental Radiology
  9. 9. Radiology DefinitionsRadiation– A form of energy carried by waves or a stream of particlesX-radiation– High energy radiation produced by a beam of electrons colliding with a metal target in an x- ray tube
  10. 10. And More…Radiograph– A picture on film (photographic image) produced by the passage of x-rays through an object. In practice often called an “x-ray”Dental Radiograph– A photographic image produced on film by the passage of x-rays through teeth and related structures
  11. 11. Importance of Dental Radiographs Detection of disease processes View unseen clinical conditions Basic component of comprehensive care
  12. 12. Uses of Dental RadiographsDetection (lesions,disease)Confirmation ( duringtreatment)EvaluationClassify / IllustratechangesLocalize lesions/objectsDocumentation
  13. 13. Detection and Confirmation
  14. 14. Treatment Information
  15. 15. Confirmation of Completed Treatment Before After
  16. 16. Evaluation
  17. 17. Localize Lesions
  18. 18. Illustrate Changes
  19. 19. Documentation
  20. 20. Dental RadiographerAny person whoposition, exposesand processesdental x-ray filmTypically dentalassistant or dentalhygienist
  21. 21. Knowledge BaseBackground Information on radiographyRationale for the procedureExposure factorsManipulation of equipmentFilm placementPatient managementMethods of processing
  22. 22. Duties and ResponsibilitiesFilm placement, exposure and processingFilm mountingPatient educationDarkroom maintenanceQuality controlOrdering of film and supplies
  23. 23. Patient ProtectionLead apron with thyroidcollarFast filmAppropriate collimationLowest possible radiationexposure ALARAGood techniqueMeticulous handling ofthe film
  24. 24. Operator ProtectionAvoid primary beamMaintain adequate distanceNever hold a film in positionNever hold the tube head
  25. 25. X-Ray MachinesIntraoral
  26. 26. X-Ray MachinesExtraoral– Developed in the 1950’s
  27. 27. X-Ray MachinesModern Extraoral Machines
  28. 28. Parts of the X-Ray MachineExtension armControl boxTubehead Source of x-rays Heart of machine
  29. 29. The Tubehead
  30. 30. Beam AlignmentRound PIDRectangular Collimator
  31. 31. Film HoldersMany types toaccommodatedifferent techniques