Dental Materials for Denture Bases

<p>Compromised mechanical properties (B)</p> Signup and view all the answers

<p>Higher creep rates are favorable (A)</p> Signup and view all the answers

<p>Glass and carbon fibers (B)</p> Signup and view all the answers

<p>Metal wires and plates (B)</p> Signup and view all the answers

<p>Using water-based adhesives (C)</p> Signup and view all the answers

<p>To improve mechanical strength (B)</p> Signup and view all the answers

<p>Carbon fibers (B)</p> Signup and view all the answers

<p>Higher percentage of volumetric contraction (B)</p> Signup and view all the answers

<p>Heat-activated denture base resins (D)</p> Signup and view all the answers

<p>Heat-cured resins provide stronger mechanical properties. (D)</p> Signup and view all the answers

<p>Resins are shaped by applying heat and pressure simultaneously. (C)</p> Signup and view all the answers

<p>Heat-cured resins undergo a thermal curing process. (C)</p> Signup and view all the answers

<p>Volumetric contraction upon curing (A)</p> Signup and view all the answers

<p>Shaping under heat and pressure (C)</p> Signup and view all the answers

<p>They often cure faster than other types of resins. (A)</p> Signup and view all the answers

<p>Lower volumetric contraction (D)</p> Signup and view all the answers

<p>It involves a one-step process of shaping resins. (C)</p> Signup and view all the answers

<p>Polymerization shrinkage (A)</p> Signup and view all the answers

<p>Gypsum (A)</p> Signup and view all the answers

<p>7% (B)</p> Signup and view all the answers

<p>Thermal shrinkage as the resin cools (A)</p> Signup and view all the answers

<p>It causes high processing stresses. (A)</p> Signup and view all the answers

<p>Minimum pressure (C)</p> Signup and view all the answers

<p>To facilitate easier removal of the mold (D)</p> Signup and view all the answers

<p>Buffalo knife (B)</p> Signup and view all the answers

<p>Allow the flasks to bench cool (A)</p> Signup and view all the answers

<p>Wedging an instrument in the notch (B)</p> Signup and view all the answers

A dental fabrication method that uses heat to shape denture base resins.

Materials that become moldable when heated.

The process of forcing material into a mold under pressure.

The form that defines the shape of the final denture base.

The final product created using compression molding.

Denture base resins that take longer to set, typically requiring 30-45 minutes.

The amount of unpolymerized liquid resin remaining after the denture base has hardened.

The ability of a material to resist deformation under stress.

The tendency of a material to absorb water.

The ability of a material to resist changes in shape over time due to continuous pressure.

The process of strengthening resins by adding materials like glass fibers, carbon fibers, kevlar fibers, or metal inserts (wires, plates, or fillers).

Glass fibers, carbon fibers, and kevlar fibers are all examples of this type of reinforcement material.

Wires, plates, or fillers are all examples of this type of reinforcement material.

This type of reinforcement is popular for materials like acrylics, used in making dentures.

Reinforcement techniques are used to improve the strength and durability of acrylic resins.

The change in volume that occurs when a material solidifies, usually due to chemical reactions.

The reduction in size that occurs as a material cools down.

The difference in how much two materials shrink or expand when heated or cooled.

High processing stresses caused by a combination of polymerization shrinkage, thermal shrinkage, and differences in thermal contraction between the resin and mold.

A type of resin that hardens when heated, resulting in a strong and durable final product.

A type of resin that hardens through a chemical reaction, typically involving a catalyst or initiator.

Heat-cured resins often have better properties like strength, hardness and durability, but they are prone to greater shrinkage during the setting process.

A material that hardens and fixes its shape, usually through a chemical process.

The process of carefully removing a denture from the flask after molding, using minimal force to prevent damage.

The stage after molding where the flask is allowed to cool down to room temperature naturally.

A specialized tool used to pry open the flask lid by inserting it into a designated notch.

The removable lid of the flask, where the denture base is molded.

The notch or groove on the flask lid, where the Buffalo knife or chisel is inserted.