Dowel Types in Dentistry Lecture

Play an AI-generated podcast conversation about this lesson

What is the primary purpose of a dowel?

To reinforce the tooth structure

To prevent coronal fractures

To provide retention and resistance for the restoration (correct)

To assist in caries removal

How is a pre-fabricated dowel added to a prepared canal space?

Cemented and then a core is added (correct)

Molded intraorally and sent to a lab for casting

Fitted with an artificial crown

Cemented and then cast into metal

In what situations might a dowel/core & crown be unnecessary?

In all endodontically treated teeth

When the tooth structure is very thin after preparation

In posterior teeth with extensive caries

When conservative retention and resistance features can be used (correct)

How is a cast dowel and core made?

Molded intraorally and sent to a lab for casting (B) Signup and view all the answers

What is the definition of a dowel?

A post usually made of metal that provides retention and resistance for the restoration (A) Signup and view all the answers

What is added to a pre-fabricated dowel after it's cemented into a prepared canal space?

A restorative material as a core (D) Signup and view all the answers

When might a dowel/core & crown be unnecessary for endodontically treated teeth?

When there's enough remaining tooth structure for retention and resistance (D) Signup and view all the answers

What is the GPT's (2008) view on the purpose of a post?

"REINFORCE" the tooth structure (C) Signup and view all the answers

What is the main purpose of removing caries and previous restorations in tooth preparation for complete coverage?

To ensure proper fit of the crown (A) Signup and view all the answers

In crown preparation, what is the recommended length with respect to the clinical crown length?

Equal to or longer than the clinical crown (B) Signup and view all the answers

What is the ideal apical seal of gutta percha in root canal preparation?

4-5mm at apex of tooth (C) Signup and view all the answers

Which surface texture is considered more retentive in crown preparation?

Roughened (knurled) (C) Signup and view all the answers

What is the minimum recommended ferrule length for a tooth to be covered by a crown?

1.5-2mm, all the way around (360° encirclement) (D) Signup and view all the answers

What complications can arise from post loosening in crown preparation?

All of the above (D) Signup and view all the answers

Which technique is used to remove the initial amount of Gutta Percha in prefabricated crown preparation?

Peeso and Gates Glidden reamers (A) Signup and view all the answers

Which technique involves shaping the canal with a system drill and using a plastic dowel fit loosely in the canal?

Direct Cast Technique (D) Signup and view all the answers

What is the standard cement that is extremely successful and tried & tested for crown cementation?

Zinc phosphate (B) Signup and view all the answers

What should be corrected to prevent complications associated with root perforation during crown preparation?

All of the above (D) Signup and view all the answers

What is the primary reason for creating a keyway during crown preparation?

To prevent rotation (D) Signup and view all the answers