CCE CCE Finishing & Surface Characterization

Question 1

Which finishing method is preferred to achieve the highest surface smoothness on feldspathic porcelain before glazing?

Accepted Answer

Sequential polishing with decreasing grit silicone points and diamond pastes

Answer

Sequential polishing with progressively finer abrasive instruments followed by diamond polishing paste achieves the smoothest surface prior to the glaze firing.

Question 2

Auto-glazing of dental porcelain refers to:

Accepted Answer

Firing the porcelain to its fusion temperature so the surface material itself becomes smooth and glassy

Answer

Auto-glazing (also called self-glazing or over-glazing) involves firing the ceramic to a temperature where the surface particles fuse together without adding a separate glaze material.

Question 3

What is the primary risk of over-polishing a ceramic restoration?

Accepted Answer

Rounded and flattened surface anatomy reducing esthetic characterization

Answer

Excessive polishing rounds cusp tips and flattens developmental grooves, erasing natural surface morphology and reducing the esthetic quality of the restoration.

Question 4

Surface texturing on anterior ceramic restorations serves primarily to:

Accepted Answer

Mimic natural enamel lobes, perikymata, and developmental grooves for improved esthetics

Answer

Surface texture mimics the natural micro-anatomy of enamel (perikymata, lobes, developmental grooves), controlling light reflection and contributing to a lifelike appearance.

Question 5

Which instrument is most appropriate for adding fine surface texture to an unglazed feldspathic ceramic surface?

Accepted Answer

Fine diamond bur or texturing stone used at low speed

Answer

Fine diamond burs or texturing stones used at low speed and light pressure allow precise, controlled addition of surface detail without fracturing the ceramic.

(CCE) Certified Ceramist Practice Test

(CCE) Certified Ceramist Practice Test

CCE CCE Finishing & Surface Characterization