Question 1

A large, well-adapted radiopaque restoration with smooth borders is probably:

Accepted Answer

Gold restorations are radiopaque, well-adapted, and have smooth borders, making them distinguishable from other materials.

Question 2

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

Accepted Answer

Porcelain is the most dense and least radiolucent of the nonmetallic restorations. Unfilled acrylic and filled acrylic have lower densities and higher radiolucencies than porcelain. Composite also has lower density and higher radiolucency compared to porcelain.

Question 3

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

Accepted Answer

Radiopaque particles are added to composite materials to make them visible on radiographs, helping to differentiate them from dental caries, which appear radiolucent.

Question 4

Diatorics are found in:

Accepted Answer

Diatorics are retention features found in anterior porcelain denture teeth to help secure them to the denture base.

Question 5

According to the text, if questions arise as to what is seen on a radiograph concerning dental restorations, materials, or foreign objects, ____ can be used to obtain additional information.

Accepted Answer

Clinical examination of the patient can provide more information about any dental restorations or foreign objects that may be visible on a radiograph. Verbal inquiry of the patient may not always provide accurate information, an internet search or textbook reference may not be specific to the patient's individual case.

Question 6

Diatorics are:

Accepted Answer

Diatorics are metal retention pins used in dentistry to help secure dental prosthetics.

Question 7

A porcelain-fused-to-metal crown appears:

Accepted Answer

A porcelain-fused-to-metal crown typically has two radiographic components. The metal component appears completely radiopaque due to its high density, while the porcelain component appears slightly radiopaque because it contains some radiopaque materials. This creates a two-component appearance on a radiograph.

Question 8

Amalgam overhangs can be described as extensions of amalgam seen on dental radiographs beyond the crown portion of a tooth located in the ____ region.

Accepted Answer

Amalgam overhangs are usually seen in the interproximal region, where the excess amalgam material extends beyond the crown portion of the tooth and accumulates on the adjacent tooth surface.

Question 9

A base material appears ____. If compared with amalgam, the base material appears ____ radiodense.

Accepted Answer

A base material is typically radiopaque, meaning it appears white or light on a radiograph. Compared to amalgam, which is very radiodense, the base material is less radiodense.

Question 10

The greatest potential negative consequence of an amalgam overhang is:

Accepted Answer

An amalgam overhang can lead to destruction of interproximal bone, which can cause periodontal disease and tooth mobility. The other options may cause esthetic issues, but do not have the same potential negative consequences as bone loss.

Question 11

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

Accepted Answer

The thin radiopaque line outlines the prepared tooth in an all-porcelain crown represents the cement used to bond the crown to the tooth.

Question 12

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

Accepted Answer

Post and core restorations are utilized in endodontically treated teeth to provide support to the weakened tooth structure and to retain a crown or bridge.

Question 13

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

Accepted Answer

Radiopaque means that the object absorbs x-rays and appears white or light gray on a dental radiograph. This is the case with metallic restorations, which absorb x-rays and appear as a radiopaque area on the radiograph. The other choices are not applicable in this context.

Question 14

Porcelain restoration are:

Accepted Answer

Porcelain restorations are slightly radiopaque, meaning that they can be seen on a dental radiograph, but not as clearly as metal restorations.

Question 15

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

Accepted Answer

Amalgam is the most commonly used restorative material in dentistry due to its strength, durability, and low cost. While porcelain and cast gold are also used in certain situations, they are not as commonly used as amalgam. Acrylic is primarily used for temporary restorations.

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