Dental Zirconia Overview

<p>Titanium Oxide (B)</p> Signup and view all the answers

<p>To increase the density of the zirconia and improve its strength. (A)</p> Signup and view all the answers

<p>Zirconia is a pure form of the element zirconium, while zirconium oxide is a compound. (A)</p> Signup and view all the answers

<p>Tetragonal (D)</p> Signup and view all the answers

<p>To bind the powder particles together during sintering. (A)</p> Signup and view all the answers

<p>Its high translucency and physical properties. (C)</p> Signup and view all the answers

<p>5y-FSZ has a higher translucency. (D)</p> Signup and view all the answers

<p>Presence of a cubic phase which lacks transformation toughening properties. (A)</p> Signup and view all the answers

<p>None of the above. (D)</p> Signup and view all the answers

<p>Feldspatic porcelain (B)</p> Signup and view all the answers

<p>Improve its mechanical strength and durability. (C)</p> Signup and view all the answers

<p>A bridge is used for replacing multiple teeth, while a pallor bridge is used for replacing a single tooth. (B)</p> Signup and view all the answers

<p>It undergoes a phase transformation when stressed. (A)</p> Signup and view all the answers

<p>Leucite reinforced glass ceramic (C)</p> Signup and view all the answers

<p>Its high modulus of elasticity can lead to tooth fracture. (C)</p> Signup and view all the answers

<p>Lithium disilicate (Emax) (C)</p> Signup and view all the answers

<p>They are a mix of resin and ceramics, offering a balance of resilience and esthetics. (D)</p> Signup and view all the answers

<p>They offer a balance of resilience and esthetics, reducing the risk of tooth fracture. (D)</p> Signup and view all the answers

<p>A translucent material will be visible through the tooth, creating an unnatural appearance. (A)</p> Signup and view all the answers

<p>Emax (Lithium disilicate), leucite reinforced glass ceramic, Feldspathic porcelain (D)</p> Signup and view all the answers

<p>Feldspathic porcelain (D)</p> Signup and view all the answers

A silver-colored mineral that is unstable and found in the periodic table.

A stable compound formed when zirconium reacts with oxygen, used for dental restorations.

A material made of many small crystals, like zirconia, with no glass phase.

An oxide used to stabilize zirconia in the tetragonal phase at room temperature.

The desired stable crystal form of zirconia at room temperature, maintained by yttria.

The ratio by which zirconia is milled larger before sintering to compensate for shrinkage.

Compounds like cerium or iron oxide used to achieve different shades in zirconia restorations.

Zirconia with 3% yttria, maintaining the tetragonal phase for full anatomical restorations.

Crystals that control translucency in porcelain materials.

A type of porcelain that includes leucite crystals, used for dental applications.

A glass ceramic alternative to leucite, often used for dental restorations.

The quality of materials to allow light to pass through, influencing the appearance.

A combination of resin and ceramics, providing resilience for dental restorations.

A highly aesthetic ceramic used in dental restorations with the highest translucency.

The strength comparison of ceramic materials in dental applications.

Zirconia absorbs load and transforms from monoclinic to tetragonal phase to absorb stress.

Although chemically a metal oxide, Zirconia is treated as a ceramic for its physical properties and translucency.

Contains 4% yttria and has both tetragonal and weak cubic phases; used for esthetics but weaker in strength.

Contains 5% yttria, only a cubic phase, with high esthetics but no transformation toughening.

A bridge can support only two pontics with two abutments, except in rare cases.

The cubic phase in zirconia is weak and lacks transformation toughening but offers translucency.