PANORAMIC EXPOSURE
34 Planmeca Proline XC Panoramic X-ray
User's manual
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
coincides with the Frankfort plane light beam. To do
this support the back of the patient’s head with your
hand and then adjust the tilt of the patient’s head by
raising or lowering the vertical carriage with these
keys. The patient’s back should be straight. If
necessary stretch and straighten the patient’s cervical
vertebrae by moving the vertical carriage up slightly.
Note that the Frankfort plane light, located on the side
of the cassette drive assembly, can be slid up and
down to accommodate different head sizes.
Position the apices of the patient’s upper central
incisors within the image layer (focal trough) of the
unit.
To do this touch and hold either of the Layer arrows to
move the patient positioning mechanism, and patient,
backwards or forwards until the focal trough light,
which indicates the centre of the focal trough, falls
between the second incisor and the canine. For an
average patient positioning the teeth as described
above will place the apices of the upper central
incisors within the focal trough. The left arrow moves
the patient forwards, and the right arrow moves the
patient backwards.
The number that appears on the display is the distance
the patient positioning mechanism must have been
moved, backwards or forwards, for the patient’s teeth
to be positioned within the focal trough and it serves as
a reference if you need to retake the exposure.
Midsagittal plane light
Frankfort plane light
Frankfort
plane
light
Canine
Focal trough light
Apices of the upper
central incisors
Second incisor
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