Radiographic interpretation Flashcards
If in a opt a pt has a large radioluceny in the jaw but not displacement of bone what is it likely to be
Cyst
If in a opt a pt has a large radioluceny in the jaw and there is displacement of bone what is it likely to be
Tumour like pathology
What is the first step in the differential diagnosis of lesions
Identifying if the lesion is:
-Anatomical
-Artefactual
-Pathological
How would you describe a lesion in a radiograph
Appraoch it systematically:
- Site
- Size
- Shape
- Margins
- Internal structure
- Effect on adjacent anatomy
- Number
When describing the site of a lesion on a radiograph what would you include
Where is it?
-alveolar vs basal bone etc
Is there a notable relationship to another structure?
-teeth, nerve canals etc
What is its position relative to particular structures?
-maxillary sinus floor etc
When describing the size of a lesion what do you do
Measure (or estimate) dimensions
or
Describe the boundaries
When describing the shape of a lesion what do you include
General shape
-rounded
-scalloped
-irregular
When describing the shape of a radiolucency lesion what it it important to include
Locularity
-Unilocular
-Psedudolocular
-Multiocular
When describing the margins of a lesion what do you include
Either:
Well defined and
- Corticated
-Non Coerticated
Poorly defined and
-Blending in
-Ragged or moth eaten
When would you desribe a lesion as corticated
When it has a define white line going around it
When describing the internal structure of a lesion what would you include
is it either:
-Entirely radiolucent
-Radiolucent with some internal radiopacity
-Radiopaque
If there is internal radiopacities in the lesion how do you describe them
By the:
Amount
-Scant, multiple, dispersed,
Bony septae
-Thin/coarse, prominent/faint, straight/curved
Particular structure -Enamel & dentine radiodensity
What causes radiolucencys to jaws in radiographs
Resorption of bone
↓ mineralisation of bone
↓ thickness of bone
Replacement of bone with abnormal, less-mineralised tissue
What causes radiopacitys to jaw in radiographs
↑ thickness of bone
Osteosclerosis of bone
Presence of abnormal tissues
Mineralisation of normally non-mineralised
tissues
When describing the effect on adjacent anatomy what do you include
How does it affect:
Bone
-Displacement of cortices etc
Teeth
-Displacement/impaction, Resorption, etc
Inferior alveolar canal /
maxillary sinus / nasal cavity
-Displacement, Erosion etc
