Figure 1-15. - Film and cylinder placement: maxillary cuspid area.

5. Adjust the locator ring and align the tubehead cylinder.

6. Make the exposure.

Mandibular Bicuspid Area

1. Set the exposure time to the manufacturer's suggested impulses.

2. Assemble the posterior paralleling device.

3. Position the paralleling device with film in the patient's mouth. Position the film packet so that it is centered on the second bicuspid and parallel with its long axis (fig. 1-20).

4. Place a cotton roll on the upper surface of the bite-block and have the patient close.

5. Adjust the locator ring and align the tubehead cylinder.

6. Make the exposure.

Mandibular Molar Area

1. Set the exposure time to the manufacturer's suggested impulses.

2. Assemble the posterior paralleling device.

3. Position the paralleling device with film in the patient's mouth. Position the film packet. Center the film on the second molars, so the anterior edge of the film includes at least the distal half of the second bicuspid. The film should be parallel with the long axis of the molars (fig. 1-21).

4. Place a cotton roll on the upper surface of the bite-block and have the patient close.

5. Adjust the locator ring and align the tubehead cylinder.