Myray 708G, Operator'S Manual

Page: 37 / 1174

36
OPERATOR'S MANUAL EN
8) Check the proper positioning of the Frankfurt plane superimposing the
upper horizontal light beam (dotted line). To adjust the patient’s head
inclination, work the column up and down movement buttons. Make sure
that the patient keeps his or her back straight and extended.
9) Ask the patient to smile to uncover the upper teeth. The vertical light beam usually falls between the canine cusp
*.
In case of patient dysmorphia, move the light beam forward or backward towards the canine, by using the console
buttons , in order to optimise teeth focusing.
* the canine can be used as a useful reference to fine-tune the patient alignment, but this is not strictly necessary.
10) Press the CONFIRM button and, just before leaving the room to press the X-ray emission button, ask the patient
to close his or her eyes, swallow and place the tongue against the palate.
5.4.4. TMJ EXAMINATION
5.4.4.1. LATERAL TMJ
1) Remove the chinrest and the bite piece and fit the subnasal support.
2) Adjust the height of the unit to facilitate patient access using the column up or down movement buttons
, until the subnasal support reaches the height of the base of the nose. The telescopic column moves slowly at first
and then picks up speed.
TMJ examinations can be performed with the mouth open or closed by selecting the suitable icon on the control
console.
3) Guide the patient towards the unit so that he or she is
in front of the subnasal support and can grip the large
handles. The operator and the patient will face each
other. The patient must rest the base of his/her nose on
the subnasal support as shown in the figure.
4) Check the symmetry of the patient’s head using the
sagittal vertical light beam as a guide. Check the proper
positioning of the Frankfurt plane using the upper
horizontal light beam, as shown in the previous figure.
If the examination requires it and if necessary, slightly
tilt the patient's head forward to help him/her open the
mouth as wide as possible.
5) Once the correct positioning has been reached, lock
the craniostat as explained in paragraph 5.4.2.