FONA XPan 3D Operating Instructions
69 683 70110
- 150831
19/28
The FH (Frankfort Horizontal) horizontal beam should be falling
between the upper edge of the external auditory meatus and the
lower edge of the infra-orbital rim.
The height of the FH horizontal beam can be adjusted with a
dedicated knob.
Adjust the height of the unit to have the Frankfort plane
Horizontal (FH) and the cervical vertebrae straight (not bent
forward) and stretched.
Fine tune the head inclination for the FH setting by briefly
touching the UP or DOWN height adjustment key.
Verify side rotation of the head with reference to the Midsagittal
light using the mirror from the back of the patient and correct in
case.
Ask the patient to swallow and keep the tongue lightly pressed to
the palate.
Eventually recommend to avoid movements till the end of the
exposure.
Correct position:
Frankfurt plane is horizontal.
Wrong position:
Frankfurt plane is NOT horizontal
The head is tilted forward thus
resulting in a V shaped dental arch.
Wrong position:
Frankfurt plane is NOT horizontal
The head is tilted backward, thus
resulting in a flat dental arch.
