Quiz 3

Question 2

What is the veneer?

Answer 2

A thin shell of tooth-covered material

The veneer is a ceramic restoration that matches the shade of adjacent teeth.

Question 3

What is the maximum space allowed between the crown margin and the finish line of the preparation?

Answer 3

0.5 mm

This space should not exceed 0.5 mm at the cervical margins of the provisional.

Question 4

How is a Maryland bridge held in place?

Answer 4

Winglike extensions bonded onto the lingual surfaces of adjacent teeth

These extensions provide support for the pontic.

Question 5

What component of a fixed bridge provides support for the replacement tooth?

Answer 5

Abutment

The pontic is the false tooth that replaces the natural missing tooth.

Question 6

What is the setting time for the resin placed in a preformed crown?

Answer 6

Approximately 90 seconds

The crown is lifted off and on the prepared tooth until the resin hardens.

Question 7

The two types of provisional coverage include _____ and _____.

Answer 7

custom; prefabricated

These are the commonly used types of provisional coverage.

Question 8

What home care instructions are given for a patient with provisional coverage?

Answer 8

Avoid chewing on the provisional

Patients should also brush carefully and contact the office if the provisional comes off.

Question 9

Which component of a fixed bridge replaces a missing natural tooth?

Answer 9

Pontic

The abutment provides support for the pontic.

Question 10

When is laboratory-fabricated coverage used?

Answer 10

When several teeth have been prepared

It is also used for multiunit bridges.

Question 11

What is an appropriate patient home care instruction for someone with provisional coverage?

Answer 11

Pull floss through the contact, either to the facial or lingual side

Patients should not ‘pop’ the floss in and out.

Question 12

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

Answer 12

Unit

A crown is a cast restoration covering the entire anatomic crown of a tooth.

Question 13

Why is the provisional placed on the tooth in the patient’s mouth for the final curing stage?

Answer 13

To avoid excess shrinkage of the provisional during the final curing stage

The occlusion is checked after curing.

Question 14

If the liquid or powder acrylic material is being used for the provisional, how many drops of liquid are used?

Answer 14

10

Ten drops of liquid are placed in a dappen dish for each unit being prepared.

Question 15

When would a stainless steel crown be used for provisional coverage?

Answer 15

For the restoration of primary posterior teeth

Stainless steel crowns are used when strength is essential.

Question 16

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

Answer 16

Shade guide

It contains different shades of teeth for color matching.

Question 17

What is a contraindication for provisional coverage?

Answer 17

Cover the facial of a veneer preparation

Very little tooth structure is removed for veneer preparations.

Question 18

What is the name for the opening into which a post is cemented?

Answer 18

Post channel

A keyway slot holds the post steady in the canal.

Question 19

Which provisional preformed crowns are used on anterior teeth when appearance is important?

Answer 19

Polycarbonate

Other crowns like stainless steel are not esthetic.

Question 20

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

Answer 20

after; before

The cord must be removed to get an accurate impression.

Question 21

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

Answer 21

The tooth has been treated endodontically

A post can be a retention aid for devitalized teeth.

Question 22

What is the most common method to obtain gingival retraction?

Answer 22

Chemical retraction

This is typically done with a retraction cord.

Question 23

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

Answer 23

Opaque liner

This material helps to conceal discoloration.

Question 24

What is the purpose of provisional coverage?

Answer 24

To reduce sensitivity and discomfort of the prepared tooth

It also protects the margins of the final restoration.

Question 25

Which material could be used for a core buildup?

Answer 25

Composite material ## Footnote Amalgam can also be used if already in place.

Question 26

When is a thermoplastic tray, used to fabricate a custom provisional, made?

Answer 26

Before the dentist prepares the teeth ## Footnote This ensures the tray replicates the teeth accurately.

Question 27

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

Answer 27

Try-in ## Footnote The second appointment also involves cementation and finishing.

Question 28

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

Answer 28

Porcelain veneer ## Footnote Fixed prostheses are cemented into place and cannot be removed by the patient.

Question 29

What could occur when fabricating a provisional if undercuts are present on proximal surfaces?

Answer 29

Locking on ## Footnote Provisional restorations can become locked on due to material flow into undercuts.

Question 30

Which cement is most commonly used with provisional crowns?

Answer 30

Temporary ## Footnote Occasionally, a final cement may be used for specific reasons.

Question 31

What is the most commonly used cement with provisional crowns?

Answer 31

Temporary cement ## Footnote Temporary cement is primarily used for provisional crowns, while final cements are more difficult to remove.

Question 32

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

Answer 32

Clean under the pontic using floss and a floss threader ## Footnote Flossing under the pontic is essential as it cannot be reached with a toothbrush.

Question 33

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

Answer 33

Cementation of a final restoration ## Footnote The final appointment is focused on cementing the restoration, while try-in and shade selection occur earlier.

Question 34

Which indirect restoration is minimally invasive and can replace a congenitally missing lateral incisor?

Answer 34

A resin-bonded bridge ## Footnote A resin-bonded bridge (Maryland bridge) is less invasive compared to traditional bridges or implants.

Question 35

Which statement is correct regarding prefabricated temporary crowns?

Answer 35

Cellulose acetate is a thin clear shell available in all tooth types ## Footnote Cellulose acetate serves as a carrier for provisional material and is used for both anterior and posterior preparations.

Question 36

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

Answer 36

Three-quarter crown ## Footnote A three-quarter crown covers part of the tooth, unlike full crowns which cover the entire anatomic portion.

Question 37

How far below the margin of the preparation should the provisional crown sit?

Answer 37

It should be flush with the margin ## Footnote The provisional crown should fit snugly with no more than 0.5 mm space between the crown margin and preparation finish line.

Question 38

Once the acrylic-loaded impression is on the prepared tooth, it should remain for approximately how long?

Answer 38

3 minutes ## Footnote The acrylic needs to set for about 3 minutes in the mouth after being doughy for 1 to 2 minutes in the dappen dish.

Question 39

Which procedure would require a patient to wear a provisional prosthesis for a longer period of time?

Answer 39

Implants or periodontal therapy ## Footnote Complex treatments like implants or periodontal therapy often necessitate extended use of provisional prostheses.

Question 40

What type of cast restoration fits snugly within a tooth preparation and covers only a portion of the occlusal and proximal surface?

Answer 40

Inlay ## Footnote An inlay is designed specifically to fit within the tooth preparation, while an onlay covers more surfaces.

Question 41

What is the final step after cementing the provisional crown?

Answer 41

Check the occlusion ## Footnote After cementation, checking the occlusion with articulating paper is crucial; polishing occurs earlier in the process.

Question 42

The provisional is trimmed to within ___ mm of the gingival shoulder of the prepared tooth.

Answer 42

1 mm ## Footnote Trimming the provisional to 1 mm of the gingival shoulder ensures a proper fit and aesthetic appearance.