Chapter 19: Principles of Paralleling Technique
Learning Objectives
At the end of this module chapter, you will be able to:
19.1
- Define the key terms associated with the paralleling technique.
- State the basic principle of the paralleling technique and illustrate the placement of the receptor, beam alignment device, position-indicating device (PID), and central ray.
- Discuss how object-receptor distance affects the image and how target-receptor distance is used to compensate for such changes.
19.2
- Describe why a beam alignment device is necessary with the paralleling technique.
- List the beam alignment devices that can be used with the paralleling technique.
- Identify and label the parts of the Rinn XCP instruments.
- Describe the different sizes of receptors used with the paralleling technique and how each receptor is placed in the bite-block.
19.3
- State the five basic rules of the paralleling technique.
- Describe the patient and equipment preparations that are necessary before using the paralleling technique.
- Discuss the exposure sequence for 15 periapical receptor placements using the paralleling technique; describe each of the 15 periapical receptor placements recommended for use with the Rinn XCP instruments.
- Summarize the guidelines for periapical receptor positioning.
- Explain the modifications in the paralleling technique that are used for a patient with a shallow palate, bony growths, or a sensitive premolar region.
- List the advantages and disadvantages of the paralleling technique.
