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Principles Of Radiographic Interpretation
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- 2. Interpretation An explanation ofwhat is viewed on dental radiograph The ability to read what is revealed in dental radiograph
- 3. Diagnosis The identification ofdisease by examination or analysis
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- 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
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- 7. Optimum viewing conditions Essential requirementsfor interpretation
- 8. Knowledge of whatthe radiograph should look like Essential requirements for interpretation
- 9. Knowledge of appearanceof normal anatomical landmarks as well as variations of normal. Essential requirements for interpretation
- 10. Knowledge of radiographicappearance of pathological conditions affecting the maxillofacial region. Essential requirements for interpretation
- 11. How to interpreta radiographic image?
- 12. L O GI C
- 13. LOGIC Localize the radiograph Observethe shadows of the radiograph General consideration of radiographic facts Interpretation formulation Correlation of radiographic interpretation, history, and clinical findings
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- 15. Observe the shadowsof the radiograph
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- 17. Interpretation formulation Systematic descriptionand analysis of findings revealed in the radiograph
- 18. Interpretation formulation Site (Location) Shapeand Periphery Internal structure Effects on surrounding structures Size Number
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- 25. Shape and Periphery 1.Border 2. Margin 3. Shape
- 26. Shape and Periphery 1.Border Well defined Ill defined
- 27. Shape and Periphery 1.Border Well defined
- 28. Shape and Periphery 1.Border Ill defined
- 29. Shape and Periphery 2.Margin Corticated Non corticated Sclerotic Radiolucent rim
- 30. Shape and Periphery 3.Shape Round Oval Scalloped Irregular Inverted pear Heart shape
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- 35. Radiolucent Unilocular Multilocular Soap bubbleHoney comb Tennis Racket
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- 37. Internal structure Soap bubble Honeycomb Tennis Racket
- 38. Radiopaque or Mixed Sunray Orangepeal Ground glass Cotton wool Driven snow
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- 40. Effects on surroundingstructures Teeth Bone
- 41. Effects on surroundingstructures Teeth Widening of Periodontal membrane space Loss of lamina dura Root resorption Tooth displacement Root divergence Hindering of tooth eruption
- 42. Effects on surroundingstructures Bone Expansion Thinning Erosion & perforation Displacement of cortices Obliteration of max. sinus
- 43. Size Small – medium– large – Huge Measured in centimeters
- 44. Number Single Multiple: Systemic (blood or endocrinaldiseases) Syndromes
- 45. Again Interpretation does notequal diagnosis
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- 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
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- 50. Diagnosis Differential diagnosis How todifferentiate between different lesions which have similar radiographic appearance
- 51. Wood and GoazClassification 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