20 Questions
What is the primary purpose of a dental crown?
Improve the strength or appearance of teeth
How are dental crowns typically bonded to the tooth?
By dental cement
What allows the use of strong restorative materials in dental crown fabrication?
Indirect methods outside of the mouth
Which type of dental ceramics is known for its high glass content and excellent optical properties?
Silica-based ceramics
What process is used to produce glass-infiltrated alumina cores?
Electrophoretic deposition
Which type of dental ceramics is often used for veneering stronger substructures due to poor mechanical strength?
Silica-based ceramics
How are alumina cores without glass produced?
Milling pre-sintered blocks of the material utilizing a CAD/CAM dentistry technique
Which type of crown is indicated for posterior teeth due to aesthetic reasons and has good wear properties and dimensional accuracy?
Full metal crowns
Which material was introduced as a cheaper alternative to gold alloys for dental crowns in the 1970s and has a silverish appearance?
Palladium-based alloys
What are the clinical stages of dental crown provision, as mentioned in the text?
Assessment, choice of restoration, tooth preparation, construction and fit of temporary restoration, tooth preparation impressions, fit of definitive restoration, short-term follow up, and long-term follow up
What is the primary purpose of a dental crown?
Improve the strength or appearance of teeth and to halt deterioration
What allows the use of strong restorative materials in dental crown fabrication?
Indirect methods involving intense heat
Which material is increasingly employed for crown fabrication in CAD/CAM dentistry?
Computer technology
What is the primary reason for using silica-based ceramics in dental crown manufacture?
High glass content and excellent optical properties
How are glass-infiltrated alumina cores produced for dental crowns?
By electrophoretic deposition
What distinguishes glass-ceramics from silica-based ceramics in dental restorations?
The addition of filler particles to improve mechanical properties
What is the advantage of glass-infiltrated alumina cores over CAD/CAM produced zirconia and alumina cores without glass?
Significantly higher porcelain bond strength
Which type of crown is a hybrid between an onlay and a full crown, but is not commonly prescribed due to technical difficulties and poor patient acceptability?
7/8 crown
Which material is rarely used to make full metal crowns and is more commonly used as part of metal-ceramic crowns as bonding alloys?
Base-metal alloy
What are the clinical stages of dental crown provision, as mentioned in the text?
Assessment, choice of restoration, tooth preparation, construction and fit of temporary restoration
Study Notes
Dental Crown Restoration
- Crowns are used to restore badly broken, worn, or fractured teeth, improve aesthetics, and maintain structural stability.
- Recent literature shows no strong evidence that crowns are better than other restorations for root-filled teeth.
- Clinical stages of dental crown provision include assessment, choice of restoration, tooth preparation, construction and fit of temporary restoration, tooth preparation impressions, fit of definitive restoration, short-term follow up, and long-term follow up.
- Assessment factors include patient, biological, and aesthetic factors.
- Crown restoration choices include full crowns, 3/4 and 7/8 crowns, and materials like metal, metal-ceramic, and full ceramic crowns.
- 3/4 and 7/8 crowns are a hybrid between an onlay and a full crown, but are not commonly prescribed due to technical difficulties and poor patient acceptability.
- Full metal crowns are entirely cast in a metal alloy, with noble and high-noble alloys generally based on gold.
- Gold crowns are indicated for posterior teeth due to aesthetic reasons and have good wear properties and dimensional accuracy.
- Palladium-based alloys were introduced as a cheaper alternative to gold alloys in the 1970s and have a silverish appearance.
- Base-metal alloys are rarely used to make full metal crowns and are more commonly used as part of metal-ceramic crowns as bonding alloys.
- Titanium and titanium alloys are highly biocompatible and are used in dentistry.
- Dental crown restoration involves a thorough and targeted patient history and clinical dental examination to ensure optimum condition and longevity for the proposed crowns.
Dental Crown Restoration
- Crowns are used to restore badly broken, worn, or fractured teeth, improve aesthetics, and maintain structural stability.
- Recent literature shows no strong evidence that crowns are better than other restorations for root-filled teeth.
- Clinical stages of dental crown provision include assessment, choice of restoration, tooth preparation, construction and fit of temporary restoration, tooth preparation impressions, fit of definitive restoration, short-term follow up, and long-term follow up.
- Assessment factors include patient, biological, and aesthetic factors.
- Crown restoration choices include full crowns, 3/4 and 7/8 crowns, and materials like metal, metal-ceramic, and full ceramic crowns.
- 3/4 and 7/8 crowns are a hybrid between an onlay and a full crown, but are not commonly prescribed due to technical difficulties and poor patient acceptability.
- Full metal crowns are entirely cast in a metal alloy, with noble and high-noble alloys generally based on gold.
- Gold crowns are indicated for posterior teeth due to aesthetic reasons and have good wear properties and dimensional accuracy.
- Palladium-based alloys were introduced as a cheaper alternative to gold alloys in the 1970s and have a silverish appearance.
- Base-metal alloys are rarely used to make full metal crowns and are more commonly used as part of metal-ceramic crowns as bonding alloys.
- Titanium and titanium alloys are highly biocompatible and are used in dentistry.
- Dental crown restoration involves a thorough and targeted patient history and clinical dental examination to ensure optimum condition and longevity for the proposed crowns.
Test your knowledge of dental crown restoration with this quiz. Explore the different clinical stages, assessment factors, restoration choices, and materials used in dental crown provision.
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