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8/2/2019 Interpretation UJ
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The ability to see and understand what isrevealed by a radiographic image.
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Importance of recognizingnormal anatomy
The independence ofradiographic signs toimaging modalities
The principle of symmetry
Radiographic signs:terminology anddescription
Categorization of diseaseand/or abnormalities
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Saggital
Coronal
Axial Maxilla
Axial Mandible
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posterior
anterior
right left
leftrightanteriorposterior
superior
inferior
superior
inferior
left
left
Saggital Coronal
Axial
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buccal/facial
facial
lingual
buccal/facial
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Global Assess symmetry of form and density Follow cortical boundaries Count teeth
Local Assess periodontal ligament space and lamina dura Evaluate root form and canal structure Assess crowns for caries or abnormality
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Patient information Age, sex, race
History
Symptoms Clinical examination Existing diagnostic radiographs Image selection Initial examination of images
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Just as we use signs in
interpreting art we canuse signs to interpret
radiographs
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Systemic - Metabolic
Diagnostic Radiograph
AbnormalNormal
AcquiredDevelopmental
Congenital
Trauma
Inflammation
CystTumor:
Benign vs
Malignant
Fibro-osseous
And lesions of bone
Vascular
IMPRESSION
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Language of Interpretation
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Terminology : Radiolucent Lesions
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Unilocular Radiolucent Lesionwith Non-Corticated Borders
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Multilocular Radiolucent Lesion (cont.)
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Terminology : Radiopaque Lesions
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Focal Opacity
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Target Lesion
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Irregular and ill-defined radiopaque pattern
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Ground-Glass Radiopacity
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Ground-Glass Radiopacity (cont.)
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Mixed Density Lesion
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Mixed Density lesion:Mostly cystic withflecks of calcification
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Mixed Lucent-Opaque Lesion in thePericoronal Location
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Mixed Lucent-Opaque Lesion in thePericoronal Location (cont.)
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Soft Tissue Opacity
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Calcified lymph nodes
Sialoliths
Tonsilloliths
Phleboliths (calcified blood clots)
Calcified carotid atheromas
Calcified laryngeal cartilage and triticeous cartilage
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Dome shaped opacity in the sinus
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52 year old femalewith hypertension
Stroke in 1987
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1. Radiographic density2. Margin characteristics3. Shape4. Location and distribution5. Size6. Internal architecture7. Effect on surrounding tissue
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Benign
Radiolucent Mixed radiolucent-radiopaque Septations, loculations Radiopaque
Malignant
Always radiolucent, except: Metastases
Breast cancer Prostate cancer
Osteogenic sarcoma
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Benign Well-defined
narrow zone of transition Smooth, regular Corticated
Malignant" Ill-defined:
" wide zone of transition" Ragged" Moth-eaten
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Round Oval Undulated Unilocular Multilocular Soap bubble
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Benign
Round or ovalMalignant
Irregular
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unilocularmultilocular
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Benign
Expansion Thinning Aggressive benign may
erode
Malignant" Erosion" Destruction
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Benign
Displacement
Malignant
Erosion Destruction
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Benign
Displacement mandibularcanal
No neuro-sensory deficits
Malignant
Invasion and destruction ofcanal
Anesthesia, paresthesia
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Benign
Displacement May prevent eruption
Malignant
Floating teeth
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Benign Horizontal or near
horizontal
Malignant More variable Sometimes no
root resorption Spiked roots
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B celllymphoma
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