Question 1

_____ ceramics are the oldest of the dental ceramics and very esthetic,but they are relatively weak.

Accepted Answer

A)  Leucite 
B)  Amorphous 
C)  Feldspathic 
D)  Crystalline 
A)  Leucite 
B)  Amorphous 
C)  Feldspathic 
D)  Crystalline C

Question 2

Which of the following statements is(are)true of fluxes used in the fabrication of dental ceramics?

Accepted Answer

A)  Examples of fluxes include sodium carbonate or potassium carbonate. 
B)  Fluxes disrupt the crystal lattice. 
C)  Fluxes promote formation of an amorphous glass. 
D)  A, B, and C are true statements. 
E)  A and C are true statements. 
A)  Examples of fluxes include sodium carbonate or potassium carbonate. 
B)  Fluxes disrupt the crystal lattice. 
C)  Fluxes promote formation of an amorphous glass. 
D)  A, B, and C are true statements. 
E)  A and C are true statements. D

Question 3

Ceramic veneers are used most often on _____ teeth.

Accepted Answer

A)  maxillary anterior 
B)  maxillary posterior 
C)  mandibular anterior 
D)  mandibular posterior 
A)  maxillary anterior 
B)  maxillary posterior 
C)  mandibular anterior 
D)  mandibular posterior A

Question 4

Porcelain refers specifically to ceramics composed mainly of:

Accepted Answer

A)  feldspar. 
B)  quartz. 
C)  kaolin. 
D)  A, B, and C. 
E)  A and C. 
A)  feldspar. 
B)  quartz. 
C)  kaolin. 
D)  A, B, and C. 
E)  A and C.

Question 5

Which is an advantage of milling a ceramic crown?

Accepted Answer

A)  Green state is maximized. 
B)  It is a one-step process. 
C)  It requires an elastomeric impression. 
D)  Laboratory turnaround is minimized. 
A)  Green state is maximized. 
B)  It is a one-step process. 
C)  It requires an elastomeric impression. 
D)  Laboratory turnaround is minimized.

Question 6

At the atomic level,ceramics are composed of metal-_____ ionic bonds.

Accepted Answer

A)  hydrogen 
B)  oxygen 
C)  glycerol 
D)  silica 
A)  hydrogen 
B)  oxygen 
C)  glycerol 
D)  silica

Question 7

In ceramic-alloy restorations,the alloy substructure is generally less than _____ mm thick in areas that will be covered by the ceramic.

Accepted Answer

A)  5 
B)  2.5 
C)  2 
D)  0.5 
E)  0.1 
A)  5 
B)  2.5 
C)  2 
D)  0.5 
E)  0.1

Question 8

Which of the following statements is(are)true of all-ceramic restorations that use a high-strength core ceramic beneath traditional porcelains?

Accepted Answer

A)  The high-strength core replaces the alloy substructure. 
B)  The core ceramic is used for the entire restoration. 
C)  CAD-CAM techniques may be used to design and cut the core material out of a block of high-strength starting material. 
D)  A, B, and C are true statements. 
E)  A and C are true statements. 
A)  The high-strength core replaces the alloy substructure. 
B)  The core ceramic is used for the entire restoration. 
C)  CAD-CAM techniques may be used to design and cut the core material out of a block of high-strength starting material. 
D)  A, B, and C are true statements. 
E)  A and C are true statements.

Question 9

Ceramics:

Accepted Answer

A)  are opaque. 
B)  are translucent. 
C)  have low corrosion and wear. 
D)  A and C. 
E)  B and C. 
A)  are opaque. 
B)  are translucent. 
C)  have low corrosion and wear. 
D)  A and C. 
E)  B and C.

Question 10

The fusing temperature of a medium-fusing dental ceramic is _____° C to _____°

Accepted Answer

A)  1400; 1731 
B)  1288; 1371 
C)  1093; 1260 
D)  871; 1066 
A)  1400; 1731 
B)  1288; 1371 
C)  1093; 1260 
D)  871; 1066

Question 11

Glassy porcelains are classified according to their:

Accepted Answer

A)  fusing temperature. 
B)  sintering temperature. 
C)  coefficient of thermal expansion. 
D)  all of the above. 
E)  only A and B. 
A)  fusing temperature. 
B)  sintering temperature. 
C)  coefficient of thermal expansion. 
D)  all of the above. 
E)  only A and B.

Question 12

Leucite is a(n):

Accepted Answer

A)  crystalline phase that forms under certain conditions within the glassy phase of dental ceramics. 
B)  amorphous non-crystalline phase in dental ceramics. 
C)  by-product that forms on the surface of dental porcelain. 
D)  oxide layer that forms on the surface of the alloy substructure. 
A)  crystalline phase that forms under certain conditions within the glassy phase of dental ceramics. 
B)  amorphous non-crystalline phase in dental ceramics. 
C)  by-product that forms on the surface of dental porcelain. 
D)  oxide layer that forms on the surface of the alloy substructure.

Question 13

The principal advantage of any all-ceramic crown in contrast to a ceramic-alloy crown is:

Accepted Answer

A)  simpler manufacturing process. 
B)  lower cost. 
C)  superior fracture resistance. 
D)  excellent esthetics. 
A)  simpler manufacturing process. 
B)  lower cost. 
C)  superior fracture resistance. 
D)  excellent esthetics.

Question 14

The light source is critical for proper matching because it has a major influence on how color appears to an observer,a principle called:

Accepted Answer

A)  reflectance. 
B)  transmittance. 
C)  metamerism. 
D)  translucence. 
A)  reflectance. 
B)  transmittance. 
C)  metamerism. 
D)  translucence.

Question 15

Leucite makes the porcelain:

Accepted Answer

A)  more translucent. 
B)  stronger. 
C)  lower-fusing. 
D)  lower-expanding. 
A)  more translucent. 
B)  stronger. 
C)  lower-fusing. 
D)  lower-expanding.

Question 16

Dental porcelain is manufactured primarily from:

Accepted Answer

A)  feldspar. 
B)  silica. 
C)  alumina. 
D)  A, B, and C. 
E)  A and C. 
A)  feldspar. 
B)  silica. 
C)  alumina. 
D)  A, B, and C. 
E)  A and C.

Question 17

During firing,the particles of ceramic melt together at their edges in a process called:

Accepted Answer

A)  condensation. 
B)  sintering. 
C)  abfraction. 
D)  rheology. 
A)  condensation. 
B)  sintering. 
C)  abfraction. 
D)  rheology.

Question 18

The amount of lightness or darkness of a ceramic restoration is the:

Accepted Answer

A)  color. 
B)  hue. 
C)  chroma. 
D)  value. 
A)  color. 
B)  hue. 
C)  chroma. 
D)  value.

Question 19

The terms ceramic and porcelain are often used interchangeably.Porcelain is a type of ceramic that results when feldspar,silica,and alumina are fired together with fluxes.

Accepted Answer

A)  Statement 1 is correct; statement 2 is correct. 
B)  Statement 1 is correct; statement 2 is incorrect. 
C)  Statement 1 is incorrect; statement 2 is correct. 
D)  Statement 1 is incorrect; statement 2 is incorrect. 
A)  Statement 1 is correct; statement 2 is correct. 
B)  Statement 1 is correct; statement 2 is incorrect. 
C)  Statement 1 is incorrect; statement 2 is correct. 
D)  Statement 1 is incorrect; statement 2 is incorrect.

Question 20

A common metallic element(s)that occurs in ceramics in combination with oxygen is(are):

Accepted Answer

A)  silicon. 
B)  zirconium. 
C)  aluminum. 
D)  A, B, and C. 
E)  A and B. 
A)  silicon. 
B)  zirconium. 
C)  aluminum. 
D)  A, B, and C. 
E)  A and B.

_____ ceramics are the oldest of the dental ceramics and very esthetic,but they are relatively weak.

Which of the following statements is(are)true of fluxes used in the fabrication of dental ceramics?

Ceramic veneers are used most often on _____ teeth.

Porcelain refers specifically to ceramics composed mainly of:

Which is an advantage of milling a ceramic crown?

At the atomic level,ceramics are composed of metal-_____ ionic bonds.

In ceramic-alloy restorations,the alloy substructure is generally less than _____ mm thick in areas that will be covered by the ceramic.

Which of the following statements is(are)true of all-ceramic restorations that use a high-strength core ceramic beneath traditional porcelains?

Ceramics:

The fusing temperature of a medium-fusing dental ceramic is _° C to _°

Glassy porcelains are classified according to their:

Leucite is a(n):

The principal advantage of any all-ceramic crown in contrast to a ceramic-alloy crown is:

The light source is critical for proper matching because it has a major influence on how color appears to an observer,a principle called:

Leucite makes the porcelain:

Dental porcelain is manufactured primarily from:

During firing,the particles of ceramic melt together at their edges in a process called:

The amount of lightness or darkness of a ceramic restoration is the:

The terms ceramic and porcelain are often used interchangeably.Porcelain is a type of ceramic that results when feldspar,silica,and alumina are fired together with fluxes.

A common metallic element(s)that occurs in ceramics in combination with oxygen is(are):

Introduction to Restorative Dental Materials

Properties of Materials

Preventive Dental Materials

Direct Esthetic Restorative Materials

Dental Amalgam

Finishing, polishing, and Cleansing Materials

Cements

Impression Materials

Model and Die Materials

Waxes

Casting Alloys, wrought Alloys, and Solders

Casting and Soldering

Polymers in Prosthodontics

Dental Implants

Filters

Exam 14: Dental Ceramics

_____ ceramics are the oldest of the dental ceramics and very esthetic,but they are relatively weak.

Which of the following statements is(are)true of fluxes used in the fabrication of dental ceramics?

Ceramic veneers are used most often on _____ teeth.

Porcelain refers specifically to ceramics composed mainly of:

Which is an advantage of milling a ceramic crown?

At the atomic level,ceramics are composed of metal-_____ ionic bonds.

In ceramic-alloy restorations,the alloy substructure is generally less than _____ mm thick in areas that will be covered by the ceramic.

Which of the following statements is(are)true of all-ceramic restorations that use a high-strength core ceramic beneath traditional porcelains?

Ceramics:

The fusing temperature of a medium-fusing dental ceramic is _____° C to _____°

Glassy porcelains are classified according to their:

Leucite is a(n):

The principal advantage of any all-ceramic crown in contrast to a ceramic-alloy crown is:

The light source is critical for proper matching because it has a major influence on how color appears to an observer,a principle called:

Leucite makes the porcelain:

Dental porcelain is manufactured primarily from:

During firing,the particles of ceramic melt together at their edges in a process called:

The amount of lightness or darkness of a ceramic restoration is the:

The terms ceramic and porcelain are often used interchangeably.Porcelain is a type of ceramic that results when feldspar,silica,and alumina are fired together with fluxes.

A common metallic element(s)that occurs in ceramics in combination with oxygen is(are):

Introduction to Restorative Dental Materials

Properties of Materials

Preventive Dental Materials

Direct Esthetic Restorative Materials

Dental Amalgam

Finishing, polishing, and Cleansing Materials

Cements

Impression Materials

Model and Die Materials

Waxes

Casting Alloys, wrought Alloys, and Solders

Casting and Soldering

Polymers in Prosthodontics

Dental Implants

Filters

The fusing temperature of a medium-fusing dental ceramic is _° C to _°