CCE Ceramic Application & Contouring 2

Question 1

When building up incisal edge translucency on an anterior crown, which ceramic layering technique best mimics natural enamel optical properties?

Accepted Answer

Layer thin increments of incisal/enamel ceramic over dentin build-up, allowing light transmission

Answer

Apply opaque in thick increments to block underlying metal

Answer

Use body ceramic alone to full contour before glazing

Answer

Fire translucent glaze directly over metal without layering

Question 2

What is the primary purpose of the 'shoulder' or 'bevel' preparation when applying porcelain to a PFM crown?

Accepted Answer

To provide space for adequate ceramic thickness and esthetic margin

Answer

To increase the volume of metal substructure

Answer

To prevent shrinkage during firing

Answer

To eliminate the need for opaque layering

Question 3

When contouring buccal contours of a ceramic restoration, a dentist notices the emergence profile appears too flat. What adjustment best corrects this?

Accepted Answer

Add ceramic to the cervical third and re-fire

Answer

Reduce the incisal edge length

Answer

Increase glaze thickness

Answer

Apply additional opaque layer

Question 4

Which of the following describes 'overfiring' of feldspathic porcelain during the build-up stage?

Accepted Answer

Ceramic becomes too glossy and loses surface texture, and internal strength may be compromised

Answer

Ceramic appears chalky and porous after cooling

Answer

Color shifts toward yellow-orange due to flux migration

Answer

The ceramic shrinks less than expected

Question 5

During ceramic contouring, which area of a posterior crown most commonly requires reduction to prevent premature occlusal contact?

Accepted Answer

Marginal ridges and cusp tips

Answer

Buccal cusp tips

Answer

Lingual embrasures

Answer

Cervical line angles

Question 6

What effect does repeated firing have on the shade of an alumina-reinforced ceramic restoration?

Accepted Answer

Color may lighten or shift due to changes in fluorescence and opacity with multiple heat cycles

Answer

Shade becomes progressively darker with each firing

Answer

Shade remains perfectly stable regardless of firing count

Answer

Ceramic becomes more translucent with each firing cycle

Question 7

When applying cervical ceramic to recreate a natural gingival emergence profile, the ceramist should build the cervical area:

Accepted Answer

Convex and tapering toward the margin, mimicking natural root emergence

Answer

Perpendicular to the long axis of the tooth for maximum strength

Answer

Slightly concave to allow gingival tissue to contact the restoration passively

Answer

As a sharp angle matching the finish line exactly with no overhang