Planmeca ProOne User Manual page 60

11 TEMPOROMANDIBULAR JOINT EXPOSURE
Temple
support
button
Midsagittal
plane light
Frankfort plane
Height
adjusting
buttons
Frankfort plane light
Adjusting lever
56 Planmeca ProOne
5°
Frankfort plane
light slot
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.
Note that the Frankfort plane light, located on the side of
the column, can be moved up or down to accommodate
different head sizes. This is done by moving the adjusting
lever that is located next to the light slot.
User's Manual