Dental Continuing Education Test - BruxZir: Virtually Bulletproof - What is it? Why does it work? - Glidewell Dental Lab Continuing Education

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BruxZir®: Virtually Bulletproof - What is it? Why does it work?
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Click the circle next to each correct answer. Fill out your contact information completely. Click continue when you are ready to send the information to the Glidewell Education Center for evaluation.

Oxides are added to zirconia to stabilize the tetragonal phase.

True

False

Typical zirconia has a flexural strength of:

800 MPa

1,200 MPa

1,465 MPa

2,000 MPa

BruxZir exhibits flexural strengths up to ___?

800 MPa

1,200 MPa

1,465 MPa

2,000 MPa

The unique property of partially stabilized zirconia to inhibit micro-crack propagation is known as phase transformation toughening.

True

False

The benefit of phase transformation toughening is high impact resistance.

True

False

Zirconia has a relatively low thermal expansion number, so it remains very stable in the mouth.

True

False

A small grain size:

Improves flexural strength

Creates better translucency

Improves fracture toughness

All of the above

Fracture toughness is a quantitative way of expressing a brittle material's resistance to fracture when a crack is present.

True

False

Partially stabilized zirconia exhibits a fracture toughness ____ normal zirconia and most other ceramics.

less than

equal to

two times higher than

three to six times higher than

10.

To improve wear properties, BruxZir restorations are:

Diamond polished

Glazed

Both of the above

None of the above

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