11 TEMPOROMANDIBULAR JOINT EXPOSURE
50 Planmeca ProOne User’s Manual
Ask the patient to step forward, grasp the patient handles
and press their lips against the chin support. The patient's
nose must rest on top of the support and their mouth must
be closed, their teeth together.
Patients are not allowed to hang on the patient handles.
The pull-down force applied to the patient handles may not
exceed 15 kg (33 lb).
We recommend that you image patients with poor health
in a sitting position.
Close the temple supports by touching the temple support
button.
Stand behind the patient and check that the patient’s
shoulders are level and the neck muscles relaxed.
The three patient positioning lights will automatically
switch on when you select the exposure program. They
will switch off after four minutes. If the lights go out before
you have positioned the patient, you can touch either of
the target position arrows to switch the lights back on.
Position the patient’s head so that the midsagittal plane
coincides with the midsagittal plane light beam. Make
sure that the patient is looking straight ahead as the light
may appear to be correctly positioned but the patient’s
head could be turned slightly to one side.
Position the patient’s head so that the Frankfort plane is
tilted down five degrees. To do this support the back of
the patient’s head with your hand and, using the Frankfort
plane light as a reference line, adjust the position of the
patient’s head by raising or lowering the unit with the
height adjusting buttons. Make sure the patient’s back is
straight.
Temple
Target position arrows
support
button
Frankfort plane
5°
Frankfort plane light
Height
adjusting
buttons
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