4-10. MAXILLARY MOLARS
Adjust the head as described for radiographs of maxillary teeth (refer to
paragraph 4-7a). Place the film packet in the mouth so that its long axis is horizontal,
the anterior border of the film is lingual to the mesial border of the second bicuspid, and
the lower border of the film is parallel to and slightly below (approximately 1/4 inch) the
occlusal surfaces of the molars. The upper corner of the packet may be contoured
slightly, but the film packet should not be bent. Adjust the tube to an average
angulation of +20 degrees. Direct the central ray straight through the interproximal
spaces in the area of the second molar and perpendicular to the bisecting plane (see
figure 4-10). Follow the manufacturer's instructions for all exposure times.
Figure 4-10. Maxillary molar area.
4-11. MAXILLARY BICUSPIDS
Adjust the head as described for radiographs of maxillary teeth. Place the film
packet in the mouth so that its long axis is horizontal and its anterior border is lingual to
the mesial surface of the cuspid. Have its lower border paralleled to, and slightly below,
the occlusal surfaces of the teeth (approximately 1/4-inch). Adjust the cone to an
average angulation of +30 degrees. Direct the central ray straight through the
interproximal spaces of the first and second bicuspids at the center of the film and
perpendicular to the bisecting plane (see figure 4-11). Follow the manufacturer's
instructions for all exposure times.
MD0512
4-9
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