CCE Finishing & Surface Characterization Flashcards

Which polishing system is recommended for achieving a high-luster finish on zirconia restorations without a glaze firing?

Answer: Aluminum oxide polishing wheels designed for zirconia

Diamond-impregnated or aluminum oxide polishing systems specifically designed for zirconia are required to achieve a clinically acceptable gloss on this extremely hard material.

After chairside adjustment of a monolithic zirconia crown, the adjusted surface should be treated by:

Answer: Re-polishing with zirconia-specific polishing systems to restore smoothness

Adjusted monolithic zirconia must be re-polished with appropriate zirconia polishing instruments, as diamond bur adjustment leaves a rough surface that increases opposing tooth wear.

The purpose of the final glaze layer on a ceramic restoration is to:

Answer: Seal surface porosity, create optimal surface smoothness, and enhance esthetic luster

Glaze seals micro-porosity, produces a smooth plaque-resistant surface, and creates the high luster that enhances the esthetic appearance of the restoration.

Excessive glaze thickness applied to a ceramic restoration can cause:

Answer: Color distortion, loss of surface anatomy detail, and potential delamination

Over-application of glaze fills in surface anatomy and can cause color distortion; if too thick, the glaze may also crack or delaminate from the ceramic body.

When using oven-applied glaze versus auto-glaze (self-glaze), which statement is correct?

Answer: Applied glaze allows more control over luster level and can correct minor surface defects; auto-glaze relies solely on the ceramic body to form the surface

Applied glaze gives the ceramist control over surface luster and can slightly fill minor imperfections, while auto-glaze depends on firing the ceramic body itself to achieve the smooth surface.

What is the primary purpose of using a staining liquid (medium) when applying ceramic stains?

Answer: To provide optimal consistency for controlled application and to burn off cleanly during firing without leaving residue

Staining mediums (modeling liquids) provide the right viscosity for precise stain application and are designed to burn away completely during firing without contaminating the ceramic.