Paralleling Technique Overview ch19

These flashcards cover essential concepts, procedures, and terminology associated with the paralleling technique, crucial for exam preparation.

What is the purpose of the paralleling technique?

To present basic concepts and describe patient preparation, equipment preparation, and receptor placement procedures used in the paralleling technique.

What are the key advantages of the paralleling technique?

Accuracy (image free of distortion), simplicity (eliminates need for manual angulation adjustments), and validity (great for comparison of serial images).

Name examples of commercially available intraoral beam alignment devices.

Rinn XCP Extension Cone Paralleling System, Rinn XCP-ORA One Ring & Arm Positioning System, Rinn XCP-DS FIT Universal Sensor Holder, Rinn Flip-Ray System, Rinn Snap-A-Ray Holder, Stabe Bite-block.

What sizes of receptors are used in the paralleling technique and where are they placed?

Size 1 receptors are used in the anterior region with the long portion vertical; Size 2 receptors are used in the posterior region with the long portion horizontal.

List the five basic rules of the paralleling technique.

1. Receptor placement, 2. Receptor position, 3. Vertical angulation, 4. Horizontal angulation, 5. Film receptor exposure.

What modifications are used in the paralleling technique for patients with a shallow palate?

Two cotton rolls can be used on either side of the bite-block, and vertical angulation can be increased by 5 to 15 degrees.

Define the term 'central ray' in the context of the paralleling technique.

The central ray is the straight line from the x-ray tube that is directed perpendicular to the receptor and the long axis of the tooth.

What is the importance of a beam alignment device in the paralleling technique?

A beam alignment device is necessary to keep the receptor parallel with the long axis of the tooth during exposure.

What patient preparations are necessary before using the paralleling technique?

Explain procedures, adjust chair and headrest, place and secure the lead apron, and remove all objects from the mouth.

Why might the paralleling technique cause discomfort for some patients?

The receptor placement and the beam alignment device may cause discomfort during the procedure.