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Principles Of Radiographic Interpretation

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O6U Dentistry Faculty / Radiology II

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Principles Of Radiographic Interpretation

  1. 1. Principles of Radiographic Interpretation
  2. 2. Interpretation An explanation of what is viewed on dental radiograph The ability to read what is revealed in dental radiograph
  3. 3. Diagnosis The identification of disease by examination or analysis
  4. 4. Objectives of radiographic interpretation 3D
  5. 5. Objectives of radiographic interpretation Detection: presence or absence of disease Description: providing information on the disease according to systematic approach Differentiation: diseases of similar radiographic appearance
  6. 6. Essential requirements for interpretation
  7. 7. Optimum viewing conditions Essential requirements for interpretation
  8. 8. Knowledge of what the radiograph should look like Essential requirements for interpretation
  9. 9. Knowledge of appearance of normal anatomical landmarks as well as variations of normal. Essential requirements for interpretation
  10. 10. Knowledge of radiographic appearance of pathological conditions affecting the maxillofacial region. Essential requirements for interpretation
  11. 11. How to interpret a radiographic image?
  12. 12. L O G I C
  13. 13. LOGIC Localize the radiograph Observe the shadows of the radiograph General consideration of radiographic facts Interpretation formulation Correlation of radiographic interpretation, history, and clinical findings
  14. 14. Localize the radiograph
  15. 15. Observe the shadows of the radiograph
  16. 16. General consideration of radiographic facts
  17. 17. Interpretation formulation Systematic description and analysis of findings revealed in the radiograph
  18. 18. Interpretation formulation Site (Location) Shape and Periphery Internal structure Effects on surrounding structures Size Number
  19. 19. Site (Location) Localized
  20. 20. Site (Location) Localized Generalized
  21. 21. Site (Location) Localized Generalized Multiple
  22. 22. Site (Location) Unilateral Bilateral
  23. 23. Site (Location)
  24. 24. Site (Location)
  25. 25. Shape and Periphery 1. Border 2. Margin 3. Shape
  26. 26. Shape and Periphery 1. Border Well defined Ill defined
  27. 27. Shape and Periphery 1. Border Well defined
  28. 28. Shape and Periphery 1. Border Ill defined
  29. 29. Shape and Periphery 2. Margin Corticated Non corticated Sclerotic Radiolucent rim
  30. 30. Shape and Periphery 3. Shape Round Oval Scalloped Irregular Inverted pear Heart shape
  31. 31. Internal structure Radiodensity Radiolucent Radiopaque Mixed (RL-RO)
  32. 32. Radiolucent
  33. 33. Radiopaque
  34. 34. Mixed (RL-RO)
  35. 35. Radiolucent Unilocular Multilocular Soap bubble Honey comb Tennis Racket
  36. 36. Internal structure Unilocular Multilocular
  37. 37. Internal structure Soap bubble Honey comb Tennis Racket
  38. 38. Radiopaque or Mixed Sunray Orange peal Ground glass Cotton wool Driven snow
  39. 39. Internal structure Associated with impacted tooth
  40. 40. Effects on surrounding structures Teeth Bone
  41. 41. Effects on surrounding structures Teeth Widening of Periodontal membrane space Loss of lamina dura Root resorption Tooth displacement Root divergence Hindering of tooth eruption
  42. 42. Effects on surrounding structures Bone Expansion Thinning Erosion & perforation Displacement of cortices Obliteration of max. sinus
  43. 43. Size Small – medium – large – Huge Measured in centimeters
  44. 44. Number Single Multiple: Systemic (blood or endocrinal diseases) Syndromes
  45. 45. Again Interpretation does not equal diagnosis
  46. 46. Diagnosis History Clinical Examination Special Investigations
  47. 47. Special Investigations Conventional radiographs (periapical- occlusal- panoramic-lateral oblique-etc…) Advanced imaging modalities (CT-MRI- US-etc….) Biopsy (aspiration-smear-incisional- excisional) Blood analysis Urine analysis
  48. 48. Diagnosis Non differential diagnosis Differential diagnosis
  49. 49. Diagnosis Non differential diagnosis
  50. 50. Diagnosis Differential diagnosis How to differentiate between different lesions which have similar radiographic appearance
  51. 51. Wood and Goaz Classification Radiolucencies Periapical Pericoronal Interradicular Solitary cyst-like lesions Multilocular Ill defined Multiple separate Generalized rarefaction Mixed (RL-RO) Periapical Pericoronal Not necessarily contacting the teeth Radiopacities • Periapical • Not necessarily contacting the teeth • Multiple • Generalized

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