Reticulation: There was a too rapid change in
temperature during processing (e.g., the film was taken
from a warm developer to a cold rinse).
Crescent-shaped lines (fig. 1-54): The film
packet was creased or bent.
Herringbone image (fig. 1-55): The wrong side
of the film, packet was facing the source of the X-ray
beam during exposure causing the embossing pattern
from the lead backing to appear on the film.
Figure 1-54.Crescent-shaped lines on film.
Figure 1-55.Herringbone image.
Black areas: The film was pulled too rapidly
from its black paper wrapping, causing a discharge of
White spots: The developer failed to work on
these areas because of dirt or air bubbles.
Foreign object image (fig. 1-56): Dentures or
other objects were in the patients mouth during the
The film viewer consists of a metal case with a
back-lighted screen. The viewer is used to mount and
examine radiographs. Figure 1-57 shows a typical desk
mount film viewer. Never light the film viewer in the
darkroom when you are working with unwrapped,
unprocessed film. Keep the viewer screen clean at all
After processing the X-ray film, you will mount
the finished radiographs in cardboard or plastic
holders. Mounting makes the radiographs easy to
view, keeps them in a chronological order, and protects
them from damage.
Mounted radiographs may be viewed from either
the front or back of the mount. If viewed from the
front, the teeth appear on the film as if you were
looking directly into the patient's mouth. If viewed
from the back, the teeth appear on the film as if you
were sitting on the patient's tongue looking out.
Always mount X-rays in anatomical order. After you
mount the radiographs, file the mount in the patient's
Dental Record. There will be times when the dental
officer will want to retain the radiographs for
diagnostic purposes (e.g., endodontics). These are
normally placed in a drug envelope, labeled and dated,
and placed in the dental record.
Figure 1-56.Foreign object image.