Stupid Questions from the last test

Question 1

What is the sequence of steps of an MCC prep?

Answer 1

1) Incisal reduction
2) Labial first plane
3) Labial 2nd plane
4) Lingual 1st plane
5) Sloped shoulder finish line
6) Proximal shoulder-chamfer transition
7) Lingual 2nd plane

Question 2

The strength of a methyl is…

Answer 2

5% of metal framework

Question 3

What is the hardest - enamel, gold, dentin, or ceramic?

Answer 3

Ceramic

Question 4

What are the reasons to use a 90’ shoulder finish line?

Answer 4

Decreases the chances of unsupported enamel
Decreases the chances of porcelain marginal fracture
It reduces the margin discrepancy and rounding of porcelain margin

Question 5

An esthetic margin on a patient with a higher smile line, showing the entire tooth and 2-4mm of soft tissue is generally placed:

a. Apical to the FGM
b. Within the sulcus
c. Just apical to the attached gingiva
d. Coronal to the CT attachment

Answer 5

a. Apical to the FGM
and
b. Within the sulcus

Question 6

Contraindications for the MCC include which of the following…

a. Patients with active caries rates
b. Large pulp chambers
c. margin placement may need to be placed subgingivally
d. intact facial and lungual wall
e. extensive loss of tooth structure, but the tooth is still restorable

Answer 6

a. Patients with active caries rates

b. Large pulp chambers

Question 7

“Lipping” of the finish line of a prep occurs when?

Answer 7

The bur penetrates the tooth more than 1/2 the diameter

Question 8

Which of the following materials can be used for an external surface form?

a. Alginate impression material
b. PVS impression material
c. Wax sheets
d. Tranluscent thermo plastic sheets

Answer 8

All of the above

Question 9

T/F - The polymerization shrinkage of PMMA can lead to 6% linear shrinkage

Answer 9

False - volumetric shrinkage

Question 10

T/F - sloped shoulder prep results in the most esthetic MCC margin

Answer 10

False

Question 11

T/F - if the pulp is exposed during the prep phase of a MCC, the restoration should be completed as planned

Answer 11

False

Question 12

T/F - when prep for #9-11 FDP, #9 determines the path of insertion/withdrawal

Answer 12

False

Question 13

T/F - the higher coefficient of thermal expansion of dental allow results in compressive forces on fused porcelain

Answer 13

True

Question 14

T/F - the indirect-direct provisional technique generates the lease amount of thermal trauma to teeth, compared to the direct and indirect techniques

Answer 14

False

Question 15

T/F - the more apical the placement of the margin, the more tooth structure one can preserve

Answer 15

False