4-27. MANDIBULAR INCISORS
Using the anterior instrument assembly, center the film parallel to the long axis of
the incisor teeth (see figure 4-28). Ensure that the film is situated along the midline of
the teeth. The positioning can be accomplished by lingual placement of the film to the
area of the second bicuspids. With the bite-block resting on the incisal edges of the
maxillary incisor 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 4-28. Mandibular incisor area.