4-23. MAXILLARY INCISORS
Using the anterior instrument assembly, center the film parallel to the long axis of
the incisors, ensuring that it is lined up with the midline (see figure 4-24). Use the full
length of the block to position the film distally to the region of the first molar. With the
block resting on the incisal edges of the teeth to be x-rayed, insert a cotton roll between
the mandibular incisors and the block. 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 the rod and the ring on the vertical
and horizontal planes.
Figure 4-24. Maxillary incisor area.