Dental Crowns Quiz

<p>Potential interference with taste (A)</p> Signup and view all the answers

<p>To cover a tooth with a large amalgam filling, protecting it and the tooth from fracture. (A)</p> Signup and view all the answers

<p>25% (B)</p> Signup and view all the answers

<p>To easily test the vitality of the tooth (D)</p> Signup and view all the answers

<p>More extensive tooth structure removal compared to a partial crown (A)</p> Signup and view all the answers

<p>When maximum retention and resistance are needed, or when recontouring is needed for a removable partial denture clasp. (C)</p> Signup and view all the answers

<p>When there is a low need for retention and resistance, or when a more conservative crown could be used. (B)</p> Signup and view all the answers

<p>Gingival surface preparation. (C)</p> Signup and view all the answers

<p>Fine-grit long needle diamond. (A)</p> Signup and view all the answers

<p>6-degree taper. (C)</p> Signup and view all the answers

<p>Supra-gingival. (B)</p> Signup and view all the answers

<p>Lingual cusps of the upper teeth and buccal cusps of the lower teeth. (A)</p> Signup and view all the answers

<p>To provide an adequate thickness of metal over the centric or functional cusp. (B)</p> Signup and view all the answers

<p>At the low points and high points of each cusp. (C)</p> Signup and view all the answers

<p>1 mm (C)</p> Signup and view all the answers

<p>Round-end tapered diamond bur (C)</p> Signup and view all the answers

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

<p>The proposed path of withdrawal of the restoration (A)</p> Signup and view all the answers

<p>In an inclined manner. (D)</p> Signup and view all the answers

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

<p>At the same line as the reduction (A)</p> Signup and view all the answers

<p>Round-end tapered diamond bur and no. 17 bur (B)</p> Signup and view all the answers

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

<p>As far as possible without nicking adjacent teeth (C)</p> Signup and view all the answers

<p>To measure the clearance of tooth reduction. (B)</p> Signup and view all the answers

<p>Isolated areas of undecked tooth structure around proximal contacts (D)</p> Signup and view all the answers

<p>Short, thin needle diamond (B)</p> Signup and view all the answers

<p>In an up-and-down motion against the remaining tooth structure (A)</p> Signup and view all the answers

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

<p>0.5mm above the chamfer (C)</p> Signup and view all the answers

<p>Placement of retentive grooves (B)</p> Signup and view all the answers

<p>The entire prepared tooth structure (B)</p> Signup and view all the answers

<p>To refine the finish line and increase reduction depth (A)</p> Signup and view all the answers

<p>Creation of occlusal guiding grooves (D)</p> Signup and view all the answers

<p>They guide the bur during axial reduction (D)</p> Signup and view all the answers

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

A type of dental crown that completely covers the tooth's visible portion, made entirely of metal. It's known for its durability and strength.

A dental crown made entirely of metal, offering high strength and durability. It's often used for restoring teeth with extensive damage or when strength is paramount.

Full metal crowns are designed to protect a tooth from breaking or to hold the cracked parts of the teeth together. They can also be used to cover misshaped or discolored teeth, restore broken teeth, support teeth with large fillings, cover teeth treated with root canals, and cover dental implants.

Full metal crowns are made of different types of metals depending on their noble element content. High noble metal crowns contain at least 60% noble elements, noble metal crowns contain at least 25%, and base metal crowns contain less than 25%.

Full metal crowns are exceptionally strong, resist breaking or chipping, last for a long time, have excellent retention, and are durable. This makes them suitable for restoring hidden teeth.

Full metal crowns have some disadvantages, including the need to remove a significant amount of tooth structure, difficulty in testing the vitality of the tooth using an electrical pulp tester, potential interference with taste, and visibility of the metal.

Full metal crowns are used for teeth with extensive damage due to decay or trauma to prevent fractures, and for teeth with large amalgam restorations to protect the tooth and filling from breaking.

A type of metal crown that contains less than 25% noble elements, making it less expensive than other types of crowns.

A full metal crown is used when maximum retention and resistance are needed, for instance, in teeth with short crowns. It's also used for recontouring teeth to accommodate clasps for removable partial dentures or as a bridge retainer.

A full metal crown can be used to correct minor inclination, in patients with high caries index, and to correct the occlusal plane.

Full metal crowns are not ideal when aesthetics are paramount. They are also not recommended when lower retention and resistance are sufficient, or when a more conservative crown like a 3/4 crown is suitable. Additionally, they are not the best option for patients with a low caries index.

The first step in tooth preparation for a full metal crown involves reducing the occlusal surface.

This step involves shaping the buccal (cheek) surface of the tooth.

This step involves shaping the lingual (tongue) surface of the tooth.

This step involves shaping the proximal surfaces of the tooth, which are the surfaces next to adjacent teeth.

The reduction of the occlusal surface involves creating a specific shape with grooves and inclines, ensuring a functional cusp bevel for proper biting.

The process of reducing the height of cusps to create proper occlusion. It ensures smooth and balanced biting.

Grooves placed at the highest and lowest points of a cusp, guiding the reduction process.

These grooves are used to create a smooth, evenly contoured surface for better occlusion.

Depth orientation grooves should be 1.5 mm deep for functional cusps and 1 mm deep for non-functional cusps.

A tool used to accurately measure the depth of grooves during occlusal reduction.

Tooth structure is removed in a slant or angled direction between the grooves, creating a smoother occlusal surface.

A round, tapered shaping tool used for planar occlusal reduction.

A round shaping tool for beveling the functional cusp for optimal occlusion.

The process of reducing the axial walls of a tooth to create the desired shape and thickness for a crown preparation.

A diamond bur shaped like a torpedo, used for smoothly reducing the buccal and lingual surfaces of a tooth during axial reduction.

The line where the axial reduction meets the tooth's margin, creating a smooth, continuous transition.

The process of reducing the proximal surfaces of a tooth, located between adjacent teeth, during crown preparation.

A small, thin diamond bur used for precise reduction of the remaining tooth structure between the proximal surfaces during crown preparation.

The process of using the short thin needle diamond to access interproximal areas between teeth during crown preparation.

The final stage of crown preparation where the occlusal surface of the tooth is prepared for the crown, creating a smooth, even platform.

The part of the tooth preparation where the most reduction occurs, usually at the cervical margin.

A type of tooth preparation where the finishing line is a smooth, rounded edge, creating a gradual transition from the tooth to the crown.

A groove placed 0.5mm above the chamfer line to help the crown fit securely onto the tooth.

A type of dental crown that covers the entire visible portion of the tooth, providing a strong and durable restoration.

Grooves placed on the occlusal surface (chewing surface) of a tooth preparation to guide the crown's placement and contact with the opposing teeth.

Narrow grooves placed on the tooth's sides to help create even reduction along the tooth's axis during crown preparation.