Chapter 32: Identification of Restorations, Dental Materials, and Foreign Objects

Chapter 32: Identification of Restorations, Dental Materials, and Foreign Objects

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

MULTIPLE CHOICE

 

1. You are having difficulty determining whether the radiolucent area on tooth number 7 on the dental image is decay or a composite restoration. Which of the following should you do?

a.	Ask your patient.
b.	Perform a clinical examination.
c.	Search on the Internet.
d.	Look in a textbook.

 

 

ANS:  B

According to the text, if questions arise as to what is seen on a dental image concerning dental restorations, materials, or foreign objects, clinical examination of the patient can be used to obtain additional information. Verbal inquiry of the patient can be attempted, but some patients are unreliable historians. An Internet search may be useful for background information, but if dental images are interpreted without the patient present, some important clinical information is not available. A textbook reference may be useful for background information, but if dental images are interpreted without the patient present, some important clinical information is not available.

 

DIF:    Application    REF:   Page 381        OBJ:   2

TOP:   CDA, RHS, I.C.2.b. Identify anatomical structures, dental materials, and patient information observed on radiographic images

MSC:  NBDHE, 2.4 Recognition of normalities and abnormalities

 

2. Because metallic restorations absorb x-rays, the area of the image that corresponds to their location remains unexposed, and the metallic restorations appear completely ___________ on a dental image.

a.	radiosensitive
b.	radioresistant
c.	radiopaque
d.	radiolucent

 

 

ANS:  C

Because metallic restorations absorb x-rays, the area of the image that corresponds to their location remains unexposed, and the metallic restorations appear completely radiopaque on a dental image. Radiosensitivity refers to the relative sensitivity of a tissue or organ to damage from radiation and is not a property of restorations, metallic or otherwise. On a dental image, nonmetallic restorations may vary in appearance from radiolucent to slightly radiopaque, depending on the density of the material.

 

DIF:    Recall             REF:   Page 381        OBJ:   3

TOP:   CDA, RHS, I.C.2.b. Identify anatomical structures, dental materials, and patient information observed on radiographic images

MSC:  NBDHE, 2.4 Recognition of normalities and abnormalities

 

3. Of the nonmetallic restorations, ____________ is the most dense and least radiolucent.

a.	unfilled acrylic
b.	filled acrylic
c.	composite
d.	porcelain

 

 

ANS:  D

Of the nonmetallic restorations, porcelain is the most dense and least radiolucent. Acrylic is the least dense and most radiolucent. Manufacturers may add radiopaque materials such as barium to acrylic and composite materials to enhance visualization.

 

DIF:    Comprehension                               REF:   Page 381        OBJ:   3

TOP:   CDA, RHS, I.C.2.b. Identify anatomical structures, dental materials, and patient information observed on radiographic images

MSC:  NBDHE, 2.4 Recognition of normalities and abnormalities

 

4. Which of the following is the most common restorative material used in dentistry?

a.	Porcelain
b.	Cast gold
c.	Amalgam
d.	Acrylic

 

 

ANS:  C

Amalgam is the most common restorative material used in dentistry.

 

DIF:    Recall             REF:   Page 381        OBJ:   3

TOP:   CDA, RHS, I.C.2.b. Identify anatomical structures, dental materials, and patient information observed on radiographic images

MSC:  NBDHE, 2.4 Recognition of normalities and abnormalities

 

5. Amalgam overhangs, excess amalgam material that extends beyond the cavity margin, can be seen on dental images in the ____________ region of the crown of the tooth.

a.	Buccal
b.	Lingual
c.	Interproximal
d.	Occlusal

 

 

ANS:  C

Amalgam overhangs can be described as extensions of amalgam seen on dental images beyond the crown portion of a tooth located in the interproximal region. Amalgam extensions on buccal restorations may often be observed clinically; however, they are not often seen on dental images because the image is a two-dimensional representation of a three-dimensional object and depth perception is lost. Amalgam extensions on occlusal restorations may occasionally be observed; however, they do not contribute to bone loss.

 

DIF:    Comprehension                               REF:   Page 381        OBJ:   3

TOP:   CDA, RHS, I.C.2.b. Identify anatomical structures, dental materials, and patient information observed on radiographic images

MSC:   NBDHE, 2.4 Recognition of normalities and abnormalities