4-22. MAXILLARY CUSPIDS
Using the anterior instrument assembly, position the cuspid tooth on the film
parallel to the long axis of the tooth and center it (see figure 4-23). Gently contour the
anterior corner of the film to maintain position. With the block resting on the maxillary
cuspid, insert a cotton roll between the block and the mandibular teeth. 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 4-23. Maxillary cuspid area.