1. If this is the first TMJ exposure, the patient has to be prepared following the
operations described in paragraph 8.10.2.
2. Press the "Patient Entrance" key (6 - Figure 10).
3. Position the patient again if he has been removed from the centring device. Tell him
to open his mouth (helping him to keep in position using appropriate mechanical
devices - not supplied - if necessary).
4. Instruct the patient to close his eyes.
5. Press the "Luminous centring devices" key (2 - Figure 10). Two laser beams will light
up the sagittal medial plane line and the horizontal line for the Frankfurt plane
reference. Using the sagittal medial plane laser (45 - Figure 30) as the reference,
position the patient's head in such a way that the sagittal medial plane is lit by the
corresponding laser beam. The reference of the Frankfurt plane can be used to
make sure the head of the patient stays in the same position when the exam is taken
with the mouth either open or closed. If necessary, using the "Column movement"
(1/2 - Figure 10) keys, lower the column slightly to compensate for the fact that the
head, when opening the mouth, will be positioned behind and the condilus cannot
be centred on the exposed area.
Note
The laser centring devices remain on for approximately 2 minute; shutdown can
be anticipated by pressing the "Luminous centring device" key (2 - Figure 10)
or, with alignment complete, by pressing the "Patient entrance" key (6 - Figure
10) to begin preparation for exposure.
6. Close the temple clasps; this will help the patient to stay in a correct position. Check
that, during this phase, the patient has not changed position.
7. Advise the patient to keep perfectly still and not look at the rotating arm during
movement.
Note
With paediatric patient it is recommended to have a greater attention in taking
exams. Useful information and a specific checklist can be found at the Image
Gently website (www.imagegently.org).
In general with child and adolescent patients, before taking the exposure it is
suggested to run the exam in test mode in such a way to show the young
patient how the unit works and make them feel comfortable.
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