4-24. MANDIBULAR MOLARS
Position the posterior instrument assembly with the plastic bite-block centered on
the second molar (see figure 4-25). Ensure that the anterior edge of the film is adjacent
to the distal end of the second bicuspid. Ensure that the film is parallel with the long
axis of the molar teeth. Place a cotton roll between the block and the opposing
maxillary teeth and have the patient close his teeth holding the film in place. Slide the
locator ring along the indicator rod bringing it close to the skin surface and align the
x-ray unit extension tube with both the rod and the ring on the horizontal and vertical
planes.
Figure 4-25. Mandibular molar area.
MD0512
4-21