Podcast
Questions and Answers
In what situations is an all-metal crown most appropriately used?
In what situations is an all-metal crown most appropriately used?
What is a disadvantage of all-ceramic crowns compared to metal-ceramic crowns?
What is a disadvantage of all-ceramic crowns compared to metal-ceramic crowns?
Which type of crown should be used when both full coverage and a good cosmetic result are required?
Which type of crown should be used when both full coverage and a good cosmetic result are required?
What is a key reason for the interest in ceramic veneers?
What is a key reason for the interest in ceramic veneers?
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Which restoration is indicated for use in patients with incisal chipping and small proximal lesions?
Which restoration is indicated for use in patients with incisal chipping and small proximal lesions?
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Which type of crown requires the removal of large quantities of tooth structure for premolar and molar preparations?
Which type of crown requires the removal of large quantities of tooth structure for premolar and molar preparations?
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What limits the use of all-ceramic crowns?
What limits the use of all-ceramic crowns?
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Which crown type is typically not used for anterior teeth?
Which crown type is typically not used for anterior teeth?
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What is the advantage of a nonrigid fixed partial denture over a rigid design?
What is the advantage of a nonrigid fixed partial denture over a rigid design?
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Where is the ideal placement for the stress-breaking device in a five-unit pier-abutment restoration?
Where is the ideal placement for the stress-breaking device in a five-unit pier-abutment restoration?
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Which factor contributes to the tilting of posterior teeth when occlusal forces are applied?
Which factor contributes to the tilting of posterior teeth when occlusal forces are applied?
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What happens when the keyway of the connector is incorrectly placed on the mesial side of the distal pontic?
What happens when the keyway of the connector is incorrectly placed on the mesial side of the distal pontic?
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What is a potential outcome if a mandibular molar tilts mesially?
What is a potential outcome if a mandibular molar tilts mesially?
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Which condition may lead to the supereruption of posterior units in a fixed partial denture setup?
Which condition may lead to the supereruption of posterior units in a fixed partial denture setup?
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What contributes to the challenges of preparing abutment teeth for a fixed partial denture?
What contributes to the challenges of preparing abutment teeth for a fixed partial denture?
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How does a rigid fixed partial denture generally behave compared to a nonrigid design?
How does a rigid fixed partial denture generally behave compared to a nonrigid design?
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What is the primary reason for not placing a prosthesis if the patient perceives no impairment?
What is the primary reason for not placing a prosthesis if the patient perceives no impairment?
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What are the potential issues related to fixed partial dentures with a lone pier abutment?
What are the potential issues related to fixed partial dentures with a lone pier abutment?
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What does the term 'faciolingual movement' refer to?
What does the term 'faciolingual movement' refer to?
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Why is a completely rigid restoration not always recommended?
Why is a completely rigid restoration not always recommended?
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What was the range of faciolingual movement observed in studies?
What was the range of faciolingual movement observed in studies?
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How does the curvature of the arch affect tooth movement?
How does the curvature of the arch affect tooth movement?
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What type of connector is preferred for fixed partial dentures to provide strength?
What type of connector is preferred for fixed partial dentures to provide strength?
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What should a dentist do when encountering a patient with no movement in adjacent teeth?
What should a dentist do when encountering a patient with no movement in adjacent teeth?
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What complication arises due to the presence of a third molar in relation to a fixed partial denture?
What complication arises due to the presence of a third molar in relation to a fixed partial denture?
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What corrective measure can be taken if the third molar's encroachment is slight?
What corrective measure can be taken if the third molar's encroachment is slight?
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What device is commonly used in orthodontics to achieve molar uprighting?
What device is commonly used in orthodontics to achieve molar uprighting?
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What is the recommended treatment for severe tilting of the second molar?
What is the recommended treatment for severe tilting of the second molar?
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How long does the average treatment time for uprighting a molar generally take?
How long does the average treatment time for uprighting a molar generally take?
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Which approach can be used to provide stability after treatment involving the second molar?
Which approach can be used to provide stability after treatment involving the second molar?
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What notice must be taken when the second molar is moving distally after the removal of the third molar?
What notice must be taken when the second molar is moving distally after the removal of the third molar?
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What type of crown can be used as a retainer in a fixed partial denture specifically for tilted molars?
What type of crown can be used as a retainer in a fixed partial denture specifically for tilted molars?
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What is the maximum degree of convergence allowed for the long axis of prospective abutments in a fixed partial denture?
What is the maximum degree of convergence allowed for the long axis of prospective abutments in a fixed partial denture?
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What happens to stress in the alveolar bone of a molar that has tipped mesially when fitted with a fixed partial denture?
What happens to stress in the alveolar bone of a molar that has tipped mesially when fitted with a fixed partial denture?
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When is a proximal half crown contraindicated as a retainer on the distal abutment?
When is a proximal half crown contraindicated as a retainer on the distal abutment?
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What is one of the key requirements for using a proximal half crown as a retainer?
What is one of the key requirements for using a proximal half crown as a retainer?
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What is the preparation design necessary for the optical function of a telescope crown?
What is the preparation design necessary for the optical function of a telescope crown?
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What can happen if the nonrigid connector is placed on the mesial aspect of the tipped molar?
What can happen if the nonrigid connector is placed on the mesial aspect of the tipped molar?
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What feature is included in the distal surface of the premolar when preparing for a nonrigid connector?
What feature is included in the distal surface of the premolar when preparing for a nonrigid connector?
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For a nonrigid connector to be effective, what should the path of insertion of the full crown on the molar be?
For a nonrigid connector to be effective, what should the path of insertion of the full crown on the molar be?
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Study Notes
All-Metal Crown
- Provides maximum retention, suitable for molars and premolars with no esthetic requirements
- Requires less tooth removal compared to ceramic crowns, making it suitable for posterior fixed partial dentures
Metal-Ceramic Crown
- Offers both maximum retention and high esthetic qualities
- Can be used as a fixed partial denture retainer for full coverage with a good cosmetic result
All-Ceramic Crown
- Best choice when maximum esthetics and full coverage are required
- Not as fracture-resistant as metal-ceramic crowns, limiting their use to areas with low to moderate stress
- Primarily used for incisors, but cast glass ceramics can be used for posterior teeth
Ceramic Veneer
- Less destructive alternative to full crowns for esthetic restorations
- Used for intact anterior teeth with staining, developmental defects, minor chipping, and small proximal lesions
Pier Abutments
- A single tooth standing alone between two edentulous spaces presents a challenge for fixed partial dentures
- Physiologic tooth movement and differing retentive capacities of retainers can lead to stress on the abutments in rigid five-unit fixed partial dentures
- Faciolingual movement varies from 56 to 108 μm, with intrusion being 28 μm
- Different tooth segments move in different directions, creating stress on the abutments in long-span prostheses
Tilted Molar Abutments
- A common problem where a mandibular second molar has tilted mesially into the first molar space
- Impossible to prepare abutments for a fixed partial denture along their long axes while achieving a common path of insertion
- If no functional, occlusal, or esthetic impairment exists, a prosthesis may not be necessary
- Orthodontic correction (uprighting) is the preferred treatment for severe tilting, using a fixed appliance with helical uprighting spring and open coil spring
- Average treatment time for uprighting is 3 months
- If orthodontic correction is not possible or only partially achievable, fixed partial dentures can still be made
- A tilted molar will exhibit less stress in the alveolar bone with a fixed partial denture than without it
- Stress on the premolar will increase
Solutions for Tilted Molar Abutments
- Proximal half crown can be used as a retainer on the distal abutment, provided the distal surface is intact and the patient maintains good oral hygiene
- Telescope crown and coping can be used as a retainer on the distal abutment, allowing for full coverage of the clinical crown
- Nonrigid connectors can be used to compensate for the inclination of the tilted molar, placing the connector on the distal aspect of the premolar retainer
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Description
Explore the different types of dental crowns including all-metal, metal-ceramic, all-ceramic, and ceramic veneers. This quiz will test your knowledge on their applications, characteristics, and suitability for various dental situations. Perfect for dental students and professionals looking to enhance their understanding of restorative dentistry.