Dental Crowns Quiz

A metallic restoration that covers the entire crown of a tooth, restoring its function, shape, and anatomy.

A crown made entirely of a precious metal alloy, known for its strength and durability. It's commonly used for restoring teeth that require substantial reinforcement.

A crown made of a combination of metal and ceramic, often using gold or other base metals as the foundation and porcelain fused to the metal for aesthetic appeal.

A type of ceramic crown that is known for its strength, durability, and natural tooth-like appearance. It's commonly used for restoring front teeth.

The use of a crown is indicated when a tooth is significantly damaged or weakened. It's needed to protect the tooth from further damage, restore its shape, and maintain its function.

Full metal crowns are often used for restoring posterior teeth (back teeth) due to their strength and durability. These teeth are used for chewing and grinding food, so a strong restoration is needed.

A crown offers several advantages, including strength, durability, and resistance to breaking or chipping. They provide excellent retention and are suitable for restoring hidden teeth.

A key disadvantage of full metal crowns is the need to remove a significant amount of tooth structure during preparation. This can be a concern in cases where the tooth has limited remaining structure.

Teeth that have undergone root canal treatment.

The ideal amount of taper (angle) needed for a full metal crown preparation is 6 degrees.

The junction between the crown preparation and the tooth structure. It's typically located slightly above the gum line, preventing irritation.

The surface that experiences the most force during chewing.

Reduces the height of the occlusal surface, creating a smooth and flat platform for the crown.

Important cusps that help guide the jaw during chewing and help prevent tooth displacement or wear.

A pre-defined groove used as a guide during occlusal reduction, ensuring proper crown shape and function.

The area on a tooth preparation where the most reduction is needed, usually located at the margins or edges

A specific type of tooth preparation finish that creates a smooth, bevelled edge, typically using a torpedo diamond bur

A groove placed 0.5mm above the chamfer line on a tooth preparation, providing extra support and improving the fit of the crown

The final step in preparing a tooth for a full veneer crown, involving all necessary reductions, grooves, and final shaping

Grooves placed on the occlusal surface of a tooth during preparation to guide the placement of the crown, ensuring proper bite alignment

Grooves placed on the tooth's sides (axial surfaces) to guide the placement of the crown, ensuring proper fit and contour

The process of reducing the tooth's sides (axial surfaces) to create space for the crown and ensure proper contour

A groove placed in the low point and high point of each cusp to guide occlusal reduction. The low points are the central and developmental grooves, while the high points are the tips and triangular ridges.

The initial step in occlusal reduction involves using a round-end tapered diamond to create depth orientation grooves on the triangular ridges and primary developmental grooves.

Depth orientation grooves are strategically placed to guide the reduction process. They help ensure that the occlusal reduction follows the natural anatomy of the tooth.

A crucial step in occlusal reduction involves applying a consistent depth to ensure proper occlusion. On functional cusps, a depth of 1.5 mm is ideal, while for nonfunctional cusps, 1 mm is sufficient.

An enamel chisel is used to precisely measure the depth of the grooves created during occlusal reduction. This critical step ensures accurate and controlled reduction.

A specialized technique used in occlusal reduction that involves removing tooth structure between the grooves in an inclined manner. This technique helps create a smooth, natural transition.

This technique employs a round, tapered diamond and a no. 17 bur to reduce the occlusal surface in a flat, planar manner. It's essential for creating a smooth and functional occlusal surface.

This step targets the functional cusps, beveling them using a round-end tapered diamond and a no. 17 bur. This technique contributes to a smooth and functional occlusal surface.

A type of diamond bur used to shape the tooth's axial walls, creating a smooth and even contour.

The line where the prepared tooth structure meets the crown, ensuring smooth transition and a good fit.

When performing axial reduction, the preparation should not extend beyond the midpoint of the tooth to avoid weakening its structure.

During axial reduction, the preparation should extend as far as possible into the spaces between the teeth (interproximal embrasures) without damaging neighboring teeth.

Areas of untouched tooth structure remaining after initial preparation, especially around the points where teeth touch (proximal contacts).

A type of diamond bur used to reduce the tooth structure between the proximal contacts, shaping the interproximal areas for the crown.