DRC Radiographic Techniques & Procedures 2

Question 1

Which bisecting angle technique error results in foreshortened teeth on the radiograph?

Accepted Answer

Vertical angulation too steep

Answer

Excessive vertical angulation (too steep) causes the x-ray beam to strike the tooth at too great an angle, resulting in foreshortened images.

Question 2

When using the paralleling technique, the image receptor should be positioned:

Accepted Answer

Parallel to the long axis of the tooth

Answer

The paralleling technique requires the receptor to be placed parallel to the long axis of the teeth to minimize geometric distortion.

Question 3

A 'cone cut' on a periapical radiograph is caused by:

Accepted Answer

PID not centered over the receptor

Answer

A cone cut (clear unexposed area) occurs when the position-indicating device is not properly aligned to cover the entire image receptor.

Question 4

Which type of image receptor holder is specifically designed for use with digital sensors to maintain proper paralleling technique?

Accepted Answer

Rinn XCP

Answer

Rinn XCP (Extension Cone Paralleling) instruments are designed to hold the receptor parallel to the tooth and guide PID placement for accurate paralleling technique.

Question 5

During a maxillary molar periapical exposure using the paralleling technique, the receptor is placed:

Accepted Answer

Vertically as far lingual as possible

Answer

For maxillary molars, the receptor must be positioned as far palatally as possible (vertical placement) to achieve parallelism with the long axis of the teeth.

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

DRC Radiographic Techniques & Procedures 2