19 Questions
What is the primary purpose of a dowel?
To provide retention and resistance for the restoration
How is a pre-fabricated dowel added to a prepared canal space?
Cemented and then a core is added
In what situations might a dowel/core & crown be unnecessary?
When conservative retention and resistance features can be used
How is a cast dowel and core made?
Molded intraorally and sent to a lab for casting
What is the definition of a dowel?
A post usually made of metal that provides retention and resistance for the restoration
What is added to a pre-fabricated dowel after it's cemented into a prepared canal space?
A restorative material as a core
When might a dowel/core & crown be unnecessary for endodontically treated teeth?
When there's enough remaining tooth structure for retention and resistance
What is the GPT's (2008) view on the purpose of a post?
"REINFORCE" the tooth structure
What is the main purpose of removing caries and previous restorations in tooth preparation for complete coverage?
To ensure proper fit of the crown
In crown preparation, what is the recommended length with respect to the clinical crown length?
Equal to or longer than the clinical crown
What is the ideal apical seal of gutta percha in root canal preparation?
4-5mm at apex of tooth
Which surface texture is considered more retentive in crown preparation?
Roughened (knurled)
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)
What complications can arise from post loosening in crown preparation?
All of the above
Which technique is used to remove the initial amount of Gutta Percha in prefabricated crown preparation?
Peeso and Gates Glidden reamers
Which technique involves shaping the canal with a system drill and using a plastic dowel fit loosely in the canal?
Direct Cast Technique
What is the standard cement that is extremely successful and tried & tested for crown cementation?
Zinc phosphate
What should be corrected to prevent complications associated with root perforation during crown preparation?
All of the above
What is the primary reason for creating a keyway during crown preparation?
To prevent rotation
Learn about the differences between prefabricated and cast dowels, post space preparation, and their clinical applications in dentistry. Understand the definitions and clinical significance of each dowel type.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
