Chapter 09: Dental X-Ray Film Processing

Chapter 09: Dental X-Ray Film Processing

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

MULTIPLE CHOICE

 

1. The latent image is

a.	visible to the naked eye.
b.	the image on the radiographic film after processing.
c.	the image on the radiographic film before processing but after exposure.
d.	the image on the radiographic film before exposure.

 

 

ANS:  C

The latent image is the image on the radiographic film before processing but after exposure.

 

DIF:    Comprehension                               REF:   Page 82          OBJ:   1 | 2

TOP:   CDA, RHS, I.B.3.a. Describe functions of processing solutions

MSC:  NBDHE, 2.3 Technique

 

2. Which of the following statements is true about the development step in film processing?

a.	The unexposed, unenergized halide crystals are removed from the film.
b.	A subtraction reaction causes the black metallic silver to remain on the film.
c.	Developing is the first step in processing film.
d.	The film emulsion is hardened during the development stage.

 

 

ANS:  C

During processing, a chemical reaction occurs, and the halide portion of the exposed, energized silver halide crystal is removed, leaving a black metallic silver on the film. A reduction reaction causes the black metallic silver to remain on the film. In both automatic and manual processing, development is the first step in the film processing sequence. The film emulsion is softened during the development stage and hardened during the fixation stage for film processing.

 

DIF:    Comprehension                               REF:   Page 86          OBJ:   2 | 3 | 8

TOP:   CDA, RHS, I.B.3.b. Describe how to process exposed intra- and extraoral films using automatic processors                                           MSC:             NBDHE, 2.3 Technique

 

3. When the film exits the film processor, you notice that it appears foggy and lacks detail. Which of the following could be a possible solution to prevent this from occurring with the next patient’s film?

a.	Increase fixing time.
b.	Eliminate light leaks.
c.	Increase developer temperature.
d.	Decrease safelight distance.

 

 

ANS:  B

Fixing time does not affect film fog. Light leaks are a cause of film fog, all light leaks need to be eliminated. Additional causes of film fog are improper film storage, outdated film, contaminated processing solutions, and high developer temperatures. High developer temperature is a cause of film fog. Decreasing the safelight distance will increase risk of film fog.

 

DIF:    Application    REF:   Page 100        OBJ:   5 | 23

TOP:   CDA, RHS, I.B.3.b. Describe how to process exposed intra- and extraoral films using automatic processors                                           MSC:             NBDHE, 2.3 Technique

 

4. You have just taken your film from the water bath, and you notice white spots on the radiographs. How can you prevent this from occurring in the future?

a.	Gently agitate fixer and developer with the film rack to disperse the air bubbles when placing the film rack in the developer or fixer solution.
b.	Eliminate all light leaks.
c.	Increase fixation time.
d.	Prevent cross-contamination of chemicals.

 

 

ANS:  A

White spots on radiographs are caused from air bubbles that prevent the chemicals from contacting the film emulsion. To prevent this, gently agitate fixer and developer with the film rack when placing the film rack in the developer or fixer solution. White spots can also be the result of fixer contacting the film prior to development. Eliminating light leaks will prevent film fog and overexposed film, not white spots. Increasing the fixation time will prevent yellow-brown spots on the film; it will not cause white spots. Cross-contamination of chemicals will cause fogged film and black spots on the film, not white spots.

 

DIF:    Application    REF:   Page 98          OBJ:   21 | 23

TOP:   CDA, RHS, I.B.3.b. Describe how to process exposed intra- and extraoral films using automatic processors                                           MSC:             NBDHE, 2.3 Technique