7 Troubleshooting
Problem Possible cause Solution
Rows of teeth curved
upwards. Mandibular
incisors are unsharp. TMJ
joints exposed high and
are often cut off from the
image. Image is "smiling"
too much.
Patient head tilted
forward
Check FH plane
Middle area of the image
too bright and unsharp.
Spine shadow.
Patient's neck was not
stretched
Stretch patient's neck
Black shadow over
maxillary teeth apex
area.
Tongue was not against
the roof of palate.
Ask patient to swallow
and place tongue against
the roof of palate during
the exposure.
TMJ's exposed on
different heights on
image. Bilateral distortion
in molar and premolar
regions.
1. Patient tilted to one
side
2. Midsagittal light line
not obeyed.
1. Check midsagittal
plane and center
patient's head.
2. Check midsagittal
plane and center
patient's head.
Rows of teeth exposed
too high. TMJ's cut off.
1. Chin was not resting
on chin support
2. Patient positioned too
high
1. Check patient
positioning and type
of bite fork rod.
2. Check patient
positioning and type
of bite fork rod.
Rows of teeth exposed
too low. Mandible not
exposed completely to
the image.
Chin rest was not used
with bite fork.
Install chin rest.
76 ORTHOPANTOMOGRAPH
™
OP 3D Pro
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