Question 1

(1)The metal framework on a removable partial denture appears radiopaque on dental images.(2)The acrylic portion of a removable partial denture appears radiolucent on dental images.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Accepted Answer

The metal framework on a removable partial denture appears radiopaque on dental images.The acrylic portion of a removable partial denture appears slightly radiopaque on dental images.

Question 2

Post and core restorations can be seen in ____________ treated teeth.
A)periodontally
B)orthodontically
C)endodontically
D)nonendodontically

Accepted Answer

Post and core restorations can be seen in endodontically treated teeth.

Question 3

Diatorics are found in
A)silver point endodontic fillings.
B)gutta percha endodontic fillings.
C)anterior porcelain denture teeth.
D)anterior acrylic denture teeth.

Accepted Answer

Diatorics are found in anterior porcelain denture teeth.They are used to retain the denture teeth in the acrylic denture base material.

Question 4

Gutta percha appears __________.If compared with amalgam,gutta percha appears ________ radiodense.
A)radiolucent;more
B)radiolucent;less
C)radiopaque;more
D)radiopaque;less

Accepted Answer

Gutta percha appears radiopaque.If compared with amalgam,gutta percha appears less radiodense.

Question 5

Identify the restoration your patient has on tooth number 30.

A)Amalgam
B)Stainless steel crown
C)Gold crown
D)Porcelain fused to metal crown

Accepted Answer

The restoration on tooth number 30 is a stainless steel crown.

Question 6

Of the nonmetallic restorations,____________ is the most dense and least radiolucent.
A)unfilled acrylic
B)filled acrylic
C)composite
D)porcelain

Accepted Answer

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.

Question 7

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

Accepted Answer

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.

Question 8

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.

Accepted Answer

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.

Question 9

A porcelain-fused-to-metal crown appears
A)uniformly radiopaque.
B)uniformly radiolucent.
C)to have two components.The metal component appears completely radiopaque,and the porcelain component appears slightly radiopaque.
D)to have two components.The metal component appears completely radiolucent,and the porcelain component appears slightly radiolucent.

Accepted Answer

A porcelain-fused-to-metal crown appears to have two components.The metal component appears completely radiopaque,and the porcelain component appears slightly radiopaque.

Question 10

A thin radiopaque line outlining the prepared tooth may be evident on a dental image of an all-porcelain crown.This thin line represents
A)die spacer.
B)cement.
C)an air pocket.
D)a metal substructure.

Accepted Answer

A thin radiopaque line outlining the prepared tooth may be evident on a dental image of an all-porcelain crown.This thin line represents cement.Die spacer is placed to provide space for the cement layer.A metal substructure blocks the x-rays and produces a radiopaque area on the image.

Question 11

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

Accepted Answer

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.

Question 12

Some manufacturers of composite materials add radiopaque particles to their products to help the viewer differentiate a composite restoration from
A)an amalgam restoration.
B)dental caries.
C)a cast gold restoration.
D)a porcelain-fused-to-metal crown.

Accepted Answer

Some manufacturers of composite materials add radiopaque particles to their products to help the viewer differentiate a composite restoration from dental caries.Historically,some composite restorative materials were radiolucent,making it difficult at times to differentiate the restoration from decay.An amalgam restoration is very radiopaque.Adding radiopaque particles to composite materials would diminish rather than increase the differentiation of a composite restoration from amalgam or cast gold restoration,or from a PFM crown.

Question 13

You are looking at your patient's dental images.On tooth number 30,you see a large restoration that has smooth margins,doesn't conform to the tooth,and has a ghostlike radiopaque appearance.Which type of restoration does your patient have on tooth number 30?
A)Silver amalgam
B)Gold crown
C)Porcelain crown
D)Stainless steel crown

Accepted Answer

Stainless steel crowns are prefabricated,and their outlines and margins appear very smooth and regular;often,however,these crowns do not appear to fit the tooth well.They have a ghostlike radiopaque appearance on dental images.Silver amalgam two-surface and multi-surface restorations are characterized by their irregular outlines or borders.They are radiopaque.Gold will appear as a large,well-adapted radiopaque restoration with smooth borders.Unlike metallic restorations,which appear totally radiopaque,porcelain restorations are slightly radiopaque and resemble the radiodensity of dentin.

Question 14

You are going to take intraoral images on your patient.Which of the following should you ask her to remove?
1)Necklace
2)Eyeglasses
3)Nose ring
4)Hearing aids
A)1,2,3,4
B)1,2,3
C)2,3,4
D)2,3

Accepted Answer

With intraoral images,patients should be instructed to remove eyeglasses and nose jewelry.Necklaces and Hearing aids would be outside the field for an intraoral image,but not for an extraoral image.

Question 15

Porcelain restorations are
A)radiolucent.
B)slightly radiolucent.
C)slightly radiopaque.
D)radiopaque.

Accepted Answer

Porcelain restorations are slightly radiopaque.

Question 16

The greatest potential negative consequence of an amalgam overhang is
A)unesthetic contour.
B)destruction of interproximal bone.
C)impingement of the interdental papilla.
D)stretching of periodontal ligament fibers.

Accepted Answer

The greatest potential negative consequence of an amalgam overhang is destruction of interproximal bone.

Question 17

Which of the following is the most common restorative material used in dentistry?
A)Porcelain
B)Cast gold
C)Amalgam
D)Acrylic

Accepted Answer

Amalgam is the most common restorative material used in dentistry.

Quiz 32: Identification of Restorations, dental Materials, and Foreign Objects

(1) The metal framework on a removable partial denture appears radiopaque on dental images.(2) The acrylic portion of a removable partial denture appears radiolucent on dental images.

Post and core restorations can be seen in ____________ treated teeth.

Diatorics are found in

Gutta percha appears __.If compared with amalgam,gutta percha appears radiodense.

Identify the restoration your patient has on tooth number 30.

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

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.

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 porcelain-fused-to-metal crown appears

A thin radiopaque line outlining the prepared tooth may be evident on a dental image of an all-porcelain crown.This thin line represents

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.

Some manufacturers of composite materials add radiopaque particles to their products to help the viewer differentiate a composite restoration from

You are looking at your patient's dental images.On tooth number 30,you see a large restoration that has smooth margins,doesn't conform to the tooth,and has a ghostlike radiopaque appearance.Which type of restoration does your patient have on tooth number 30?

You are going to take intraoral images on your patient.Which of the following should you ask her to remove? 1) Necklace 2) Eyeglasses 3) Nose ring 4) Hearing aids

Porcelain restorations are

The greatest potential negative consequence of an amalgam overhang is

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