Planmeca ProMax X-ray User Manual page 80

TEMPOROMANDIBULAR JOINT (TMJ) EXPOSURE
Frankfort plane
5°
Frankfort plane light
76 ProMax X-ray unit with Dimax3
Move the thumb wheel that is located on the underside of
the patient support table to switch on the patient
positioning lights so that the patient can be positioned.
Note that the lights will automatically switch off after 2
minutes. If the lights go out before you have positioned
the patient move the thumb wheel again to switch the
lights back on.
Thumb
wheel
Stand behind the patient and check that the patient's
shoulders are level and the neck muscles relaxed.
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
Midsagittal
head could be turned slightly to one side.
plane light
Note that you can adjust the position of the temple
supports if needed. This will only be necessary if the
patient has an asymmetrical face and the midsagittal
plane light is not in the middle of the patient's face. For
more information, refer to page 69.
Position the patient's head so that the Frankfort plane is
tilted down 5 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.
User's Manual