1-4. Oral Disease, Health History, Pano Flashcards
(23 cards)
Define voxel
A volume element (pixel with third size)
Explain partial volume averaging
If a pixel is only partially full, it may not be fully shaded. As a result, more zoomed in images may appear choppier or not smooth
When should providers prescribe CBCT’s?
When they expect diagnostic yield will benefit patient care, enhance patient safety, and significantly improve clinical outcomes?
Three methods to staff radiation protection
- Position
- Distance
- Shielding
X-ray Radiation sources in an office?
- Primary Beam
- Scatter radiation
- Background radiation
Distance and position rules
6 feet away from source and between 90 degrees and 135 from source
Difference between deterministic and stochastic
Deterministic - Threshold amounts and below that threshold amount no clinically significant events occur (Cataracts or hair loss)
Stochastic - All or nothing effect (all exposure matters) - Cancer
Some examples of multilocular lesions
- KOT
- Ameloblastoma
- Central giant cell lesion
How to describe radiographic lesions?
Shape Edge Number Site Effects
Disease with cotton wool appearance
Paget’s
Disease with step ladder apparance
Sickle cell disease
Disease with ground glass disease
Fibrous dysplasia
Disease with sunburst pattern (3)
Chrondrossarcoma
Osteosarcoma
Ewing’s sarcoma
The closer structures are to the focal trough, are they more or less defined?
More defined
“Lesion” that presents in the depression of the submandibular gland
Stafne’s defect
Symmetric widened PDL space
Scleroderma (progressive systemic sclerosis)
What is the panoramic innominate line?
Superimposition of posterior surface of zygomatic of maxilla and frontal process of zygoma
Disease - Radiolucent with scalloped borders
Traumatic bone cyst
Dentigerous cyst and differentials?
Pericoronal radiolucency attached to CEJ of unerrupted tooth
differential is similar to ameloblastoma, residual cyst, keratocyst, myxoma
Periapical Cemento Osseous Dysplasia
Multiple periapical lucency’s which mature over time and become opaque
- Middle aged black women, vital anterior teeth, no pain or expansion
Florid Cemento Osseous dysplasia
Multi-quadrant intrabony lesion - no tx necessary
Most common primary malignancy of bone in individuals less than 25 yo?
Osteosarcoma - swift onset of pain and swelling, widened PDL, early lucency then opacity
Odontogenic myxoma
Multilocular lucency with soap bubble pattern
