Deck 50: Fixed Prosthodontics

Question 1

Under which condition would a post-and-core be recommended before placing a crown?

A)The tooth is vital.
B)The tooth has been treated endodontically.
C)The tooth has a pin for retention.
D)The tooth is not restorable.

Answer 1

The tooth has been treated endodontically.

Question 2

Which statement best describes an indirect restoration?

A)It is a cast restoration.
B)It is permanent.
C)It can be an inlay, onlay, crown, or bridge.
D)It can be all of the above.

Answer 2

It can be all of the above.

Question 3

Which statement is correct regarding a fixed bridge?

A)There are at least two abutment teeth in a fixed bridge.
B)The fixed bridge is described by the number of units involved.
C)A fixed bridge consists of at least one abutment and one pontic.
D)Both b and c are correct.

Answer 3

Both b and c are correct.

Question 4

What occurs at the final appointment in the crown and bridge process?

A)Cementation of a permanent crown
B)Casting try-in
C)Choose a shade
D)Writing the laboratory prescription

Question 5

What is the name for a crown that is covered in a thin layer of porcelain?

A)Porcelain jacket crown
B)Porcelain-fused-to-metal crown
C)Onlay
D)Three-quarter crown

Question 6

Which component of a fixed bridge replaces a missing tooth?

A)Abutment
B)Pontic
C)Unit
D)Core

Question 7

When one or more teeth are missing from the same arch,which permanent restoration is recommended?

A)Partial denture
B)Fixed bridge
C)Porcelain-fused-to-metal crown
D)Denture

Question 8

Which material is placed under a porcelain restoration to mask tooth discoloration?

A)Composite resin
B)Glass ionomer
C)Opaque liner
D)Luting agent

Question 9

Which of the following statements is correct concerning porcelain veneers?

A)Veneers are usually recommended to improve chewing efficiency of posterior teeth.
B)The color of the finished veneer can be affected by the shade of the underlying tooth structure and by the color of the luting agent.
C)Porcelain veneers do not involve preparation of tooth structure.
D)Provisional coverage is required following impressions for porcelain veneers.

Question 10

Which statement best represents an important step in the construction and placement of veneers?

A)Make a provisional to be worn while the veneer is being made.
B)Match the tooth color of the veneer to the adjacent teeth.
C)Ensure that the veneer is thick enough obscure any underlying colors.
D)Make the cement used a shade darker than the veneer.

Question 11

How is the area under the pontic of a bridge maintained?

A)Brush with a toothbrush.
B)Clean under the pontic using floss and a floss threader.
C)Irrigate with a cannula.
D)Swish with a mouth rinse.

Question 12

A gingival retraction cord is placed _____ the crown preparation is completed; it is removed _____ the final impression is taken.

A)after; after
B)after; before
C)before; after
D)before; before

Question 13

Which statement best defines the qualifications of a prosthodontist?

A)A dentist who is dedicated to restoring and replacing teeth focusing on fixed or removable prosthodontics.
B)Has received an additional 3 years of training in a program accredited by the American Dental Association.
C)A general dentist who works mostly with crowns, inlays, onlays, and bridges.
D)Both a and b are correct statements.

Question 14

What is the material of choice for an inlay or onlay restoration?

A)Porcelain
B)Ceramics
C)Gold
D)Amalgam

Question 15

Which procedure takes place during the second appointment for the placement of a cast restoration?

A)Shade selection
B)Preliminary impressions
C)Final impressions
D)Try-in

Question 16

Which type of crown does not cover the entire anatomic portion of the tooth?

A)Full
B)Three-quarter
C)Porcelain-fused-to-metal
D)Gold

Question 17

What is the term for each component of a fixed bridge?

A)Tooth
B)Crown
C)Unit
D)Core

Question 18

Which of the following is an example of a fixed prosthesis?

A)Partial denture
B)Silver amalgam core
C)Three-unit bridge
D)Pin-retained amalgam

Question 19

Which cast restoration is designed to fit snugly within a tooth preparation,such as a class II restoration,and covers only a portion of the occlusal and proximal surface?

A)Onlay
B)Inlay
C)Crown
D)Veneer

Question 20

Which component of a fixed bridge anchors to existing teeth?

A)Abutment
B)Pontic
C)Unit
D)Core

Question 21

Which device is used to determine the tooth color for ceramic crowns or bridges?

A)Articulator
B)Chamfer
C)Shade guide
D)Infuser

Question 22

A cast post is associated with which statement?

A)It is cemented into the pulp canal.
B)It is used to add height to the core buildup.
C)It is made from an acrylic pattern by a dental laboratory technician.
D)Both a and c are correct statements.

Question 23

How is a Maryland bridge held in place?

A)Abutments are cemented on either side of the pontic.
B)Winglike extensions are bonded onto the lingual surfaces of the adjacent teeth.
C)Clasps are attached to the adjacent teeth.
D)Shoulders extend to the adjacent teeth.

Question 24

What is the purpose of provisional coverage?

A)To maintain or restore tooth function, or both
B)To provide comfort for the patient while the permanent restoration is being fabricated
C)To protect the margins of the prepared tooth
D)All of the above

Question 25

Which indirect restoration is minimally invasive and can be used in selected situations,such as a replacement for a congenitally missing lateral incisor? (Select all that apply.)

A)A resin-bonded bridge
B)A Maryland bridge
C)A crown
D)A 3-unit fixed bridge
E)An implant

Question 26

What is (are)the indication(s)for prescribing fixed prosthodontics?

A)The patient wants it.
B)One or two adjacent teeth are missing in the mouth.
C)Supportive teeth are healthy.
D)All of the above are indications.

Question 27

What is the tapered finish line of the margin at the cervical area of a tooth preparation?

A)Articulator
B)Chamfer
C)Core
D)Shoulder

Question 28

Which type of retraction cord is contraindicated for patients with a history of cardiovascular disease?

A)Plain cord
B)Cord impregnated with epinephrine
C)Cord is contraindicated
D)Infuser is advised

Question 29

What is the purpose of a core buildup? (Select all that apply.)

A)To allows the crown to be less bulky
B)To provide a larger area of surface retention for cementation
C)To replace large areas of missing tooth structure
D)To opaque out discolored tooth structure
E)To support the cast crown

Question 30

Which statement is incorrect about retention pins?

A)Retention pins may be necessary to add strength to the core buildup.
B)The location of the pulp determines the exact location of the placement of the pins.
C)Retention pins can be used only if the tooth has been treated endodontically.
D)The type of crown being fabricated is a determining factor for the placement of the pins.

Question 31

What is the most common method to obtain gingival retraction?

A)Chemical retraction
B)Mechanical retraction
C)Surgical retraction
D)Infuser retraction

Question 32

Which items should be included on the laboratory prescription?

A)Dentist's name, license number, address, and signature
B)Type of prosthesis requested
C)Date when the case is expected back
D)All of the above

Question 33

Which statement is correct when packing retraction cord?

A)It is important to place the retraction cord into the sulcus without damaging the surrounding gingival tissues.
B)The placement and removal of gingival retraction cord are expanded functions and may be performed by a dental assistant trained in expanded functions.
C)Generally, the operator removes the cord while the assistant prepares the impression material.
D)All of the above are correct.

Question 34

Why would the operator "blow" a light stream of air onto the placed light-bodied impression material before seating the tray with heavy bodied material?

A)It dries the area.
B)Doing so makes it easier for the operator to see the margins of the preparation.
C)Doing so makes it easier to set the impression tray.
D)It thins the material to allow it to flow better within the sulcus and around the margins.

Question 35

Which material could be used for a core buildup?

A)Self-curing composite material
B)Reinforced glass ionomer cement
C)Amalgam
D)Any of the above

Question 36

What is the opening into which a post is cemented?

A)Keyway slot
B)Chamfer
C)Shoulder
D)Post channel