Chapter 08: Dental X-Ray Image Characteristics

Chapter 08: Dental X-Ray Image Characteristics

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

MULTIPLE CHOICE

 

1. Which of the following areas would appear the most radiopaque on a dental image?

a.	Composite
b.	Amalgam
c.	Air space
d.	Enamel

 

 

ANS:  C

A composite can appear radiopaque or radiolucent on a dental image depending on the filler content. It is not as radiopaque as amalgam. Amalgam appears the most radiopaque on a dental image. An air space would appear the most radiolucent on a dental image. Enamel would appear radiopaque on a dental image. It is not as radiopaque as amalgam.

 

DIF:    Comprehension                               REF:   Page 72          OBJ:   1

TOP:   CDA, RHS, III.B.2. Describe the characteristics of x-radiation

MSC:  NBDHE, 2.1 Principles of radiophysics and radiobiology

 

2. Density is defined as

a.	a radiopaque image.
b.	a radiolucent image.
c.	the overall blackness or darkness of an image.
d.	the difference in degrees of blackness between adjacent areas on a dental image.

 

 

ANS:  C

Radiopaque refers to that portion of a dental image that appears light or white. Radiolucent refers to that portion of a dental image that is dark or black. Density is defined as the overall blackness or darkness of a dental image. Contrast is the difference in degrees of blackness between adjacent areas on a dental image.

 

DIF:    Recall             REF:   Page 72          OBJ:   1

TOP:   CDA, RHS, III.B.2. Describe the characteristics of x-radiation

MSC:  NBDHE, 2.1 Principles of radiophysics and radiobiology

 

3. You are showing your patient a bite-wing image. Your patient points to a portion of the tooth that is the most radiopaque and wants to know what it is. What portion of the tooth is your patient pointing to?

a.	The enamel
b.	The pulp
c.	The denton
d.	The periodontal ligament space

 

 

ANS:  A

Radiopaque refers to that portion of a dental image that is white. The enamel is radiopaque and appears light on a dental image. Radiolucent refers to that portion of a dental image that is black. The pulp appears radiolucent or dark on a dental image. The denton appears less radiopaque on a dental image than the enamel. Radiolucent refers to that portion of a dental image that is black, not gray. Radiolucent refers to that portion of a dental image that is black or dark. The periodontal ligament space appears radiolucent or dark on a dental radiograph.

 

DIF:    Application    REF:   Page 72          OBJ:   1

TOP:   CDA, RHS, III.B.2. Describe the characteristics of x-radiation

MSC:  NBDHE, 2.1 Principles of radiophysics and radiobiology

 

4. Radiolucent refers to that portion of a dental image that is

a.	black.
b.	white.
c.	contains the tooth.
d.	within the plastic base.

 

 

ANS:  A

Radiolucent refers to that portion of a dental image that is black. Radiopaque refers to that portion of a dental image that is white. The pulp portion of the tooth is the most radiolucent part of the tooth.

 

DIF:    Recall             REF:   Page 72          OBJ:   1

TOP:   CDA, RHS, III.B.2. Describe the characteristics of x-radiation

MSC:  NBDHE, 2.1 Principles of radiophysics and radiobiology

 

5. If the milliamperage is increased, the receptor density ________, and the image appears _________.

a.	increases; lighter
b.	increases; darker
c.	decreases; darker
d.	decreases; lighter

 

 

ANS:  B

If the milliamperage is increased, the receptor density increases, and the image appears darker.

 

DIF:    Recall             REF:   Page 73          OBJ:   5

TOP:   CDA, RHS, III.B.1. Demonstrate knowledge of the factors affecting x-ray production

MSC:  NBDHE, 2.1 Principles of radiophysics and radiobiology