Diagnostic imaging of TMJ Flashcards
1
Q
- Introduced in oral &
maxillofacial
imaging in 2001 - Utilizes relatively
low ionization
radiation - Multiplane (3D)
visualization of hard
tissues - no visualization of
soft tissues
A
CBCT
2
Q
Adv of _____:
* Controlled
magnification
* Lack of
superimposition
* Absence of
geometric distortion
* Multiplanar & 3D display
* Ease in data acquisition,
reconstruction & display
* Improved structure
visualization &
diagnostic efficacy
A
CBCT
3
Q
- X-ray tube & detector revolve around patient
and data is stored in computer - Similar hard tissue pathology in sinuses, TMJ,
head and neck as CBCT - Not useful in evaluation of disc displacement
due to poor reliability of imaging the disc and
superiority of MRI - Pt receives higher dose of radiation
compared to dental CBCT due to larger Field
of view (FOV)
A
MDCT
4
Q
One of the most important advantages
has is the ability to separate tissues with
extracellular water from cellular tissues
with intracellular water.
A
MRI
5
Q
- radiographic contrast medium is injected into
the inferior/superior joint synovial space(s)
and the fill pattern is evaluated
radiographically; primarily with tomography - TMJ uses are disc position, meniscal/disk
perforation and fibrosis - Functioning of condyle/disc relationship can
be assessed with use of fluoroscopy and
videotaping.
A
Arthrography
6
Q
- Limited use at present due to wide
availability of MRI and patient
discomfort - Use on selected patient cases when
dynamic imaging results will alter the
course of treatment or when indicated
prior to joint lavage. - Most reliable method for identification of
perforation in the articular disc.
A
Arthrography
7
Q
- Imaging technique where bone binds a
radioisotope Tc99 - Gamma camera takes images of where the
radioisotope has collected - Metabolic activity determines degree of
radioisotope binding - Binding determines the signal strentgth
A
Nuclear medicine bone scan
