Podcast
Questions and Answers
What is a key advantage of using a cement-retained crown instead of a screw-retained crown?
What is a key advantage of using a cement-retained crown instead of a screw-retained crown?
- Allows for easy correction of angulation during crown placement (correct)
- Provides better resistance and retention form
- Ensures immediate and perfect seating of the crown
- Reduces the chances of developing complications after crown placement
In case of drifting teeth, why is it preferable to use a cement-retained crown rather than a screw-retained crown?
In case of drifting teeth, why is it preferable to use a cement-retained crown rather than a screw-retained crown?
- Ensures better resistance and retention form
- Reduces the chances of crown fracture during placement
- Provides immediate and perfect seating of the crown
- Allows for angulation adjustment to prevent gaps between teeth (correct)
How does the use of an abutment in cement-retained crowns contribute to proper crown placement?
How does the use of an abutment in cement-retained crowns contribute to proper crown placement?
- Increases the chances of crown fracture during placement
- Corrects the angulation for optimal crown seating (correct)
- Compromises the resistance and retention form
- Reduces the longevity of the crown
What limits the ability to correct angulation when using screw-retained crowns?
What limits the ability to correct angulation when using screw-retained crowns?
How does cement-retained crown placement help prevent the formation of black triangles between teeth?
How does cement-retained crown placement help prevent the formation of black triangles between teeth?
According to the information provided, which of the following statements is true regarding screw-retained crowns?
According to the information provided, which of the following statements is true regarding screw-retained crowns?
What is the primary reason cited for the difficulty in placing crowns in the posterior region?
What is the primary reason cited for the difficulty in placing crowns in the posterior region?
Which of the following statements about cement-retained crowns is true based on the information provided?
Which of the following statements about cement-retained crowns is true based on the information provided?
What is the primary consideration when adjusting occlusion for dental crowns?
What is the primary consideration when adjusting occlusion for dental crowns?
What is one reason why working with a cement-retained crown can be challenging according to the text?
What is one reason why working with a cement-retained crown can be challenging according to the text?
According to the information provided, which of the following statements about resistance and retention form is true?
According to the information provided, which of the following statements about resistance and retention form is true?
Based on the text, what does historical literature suggest about screw loosening for cement-retained crowns?
Based on the text, what does historical literature suggest about screw loosening for cement-retained crowns?
What is highlighted as a major disadvantage of cement-retained crowns in the text?
What is highlighted as a major disadvantage of cement-retained crowns in the text?
How does the size of a cement-retained crown affect the difficulty of placement according to the text?
How does the size of a cement-retained crown affect the difficulty of placement according to the text?
Why does the text mention that occlusion adjustments play a critical role in the performance of cement-retained crowns?
Why does the text mention that occlusion adjustments play a critical role in the performance of cement-retained crowns?
Which of the following is NOT a disadvantage of screw-retained crowns?
Which of the following is NOT a disadvantage of screw-retained crowns?
What is the primary advantage of cement-retained crowns over screw-retained crowns?
What is the primary advantage of cement-retained crowns over screw-retained crowns?
If a patient reports that a screw-retained crown is getting loose a week after placement, what is the most likely reason?
If a patient reports that a screw-retained crown is getting loose a week after placement, what is the most likely reason?
Which of the following statements about resistance and retention form is correct?
Which of the following statements about resistance and retention form is correct?
What is the primary concern with leaving residual cement behind for cement-retained crowns?
What is the primary concern with leaving residual cement behind for cement-retained crowns?
Why is it important to consider the long axis of the dental implant when designing crown placement?
Why is it important to consider the long axis of the dental implant when designing crown placement?
What is the main concern associated with a large degree of deviation in dental implant placement?
What is the main concern associated with a large degree of deviation in dental implant placement?
How does tilting the implant affect the lingual area of the crown?
How does tilting the implant affect the lingual area of the crown?
What is a significant disadvantage of a screw-retained crown compared to a cement-retained one?
What is a significant disadvantage of a screw-retained crown compared to a cement-retained one?
How does improper crown placement increase the risk of restorative complications?
How does improper crown placement increase the risk of restorative complications?
Why is it important for the transition from the implant platform to the gingival margin to be at least three millimeters?
Why is it important for the transition from the implant platform to the gingival margin to be at least three millimeters?
Why is it ideal for dental implants to be placed parallel to the long axis of the tooth?
Why is it ideal for dental implants to be placed parallel to the long axis of the tooth?
What type of profile is preferable for the emergence of crowns in dental implants?
What type of profile is preferable for the emergence of crowns in dental implants?
Why is it crucial for the implant placement to be directly underneath the central fossa of the tooth?
Why is it crucial for the implant placement to be directly underneath the central fossa of the tooth?
What is the purpose of ensuring that the crown has a height of contour?
What is the purpose of ensuring that the crown has a height of contour?
Which type of crown is more likely to lead to plaque and food accumulation around the implant?
Which type of crown is more likely to lead to plaque and food accumulation around the implant?
In what scenario would a concave transition from the implant platform to the gingival margin be acceptable?
In what scenario would a concave transition from the implant platform to the gingival margin be acceptable?
Why should all implants ideally be placed parallel to the long axis of the tooth?
Why should all implants ideally be placed parallel to the long axis of the tooth?
Why is it important for a crown to have a convex height of contour?
Why is it important for a crown to have a convex height of contour?
What type of dental crown is most suitable for preventing plaque buildup around an implant?
What type of dental crown is most suitable for preventing plaque buildup around an implant?
What is the primary reason the speaker emphasizes the difficulty in ensuring all cement is removed when placing a cemented crown?
What is the primary reason the speaker emphasizes the difficulty in ensuring all cement is removed when placing a cemented crown?
According to the speaker, what is a key limitation of using two-dimensional X-rays to evaluate the fit of a cemented crown?
According to the speaker, what is a key limitation of using two-dimensional X-rays to evaluate the fit of a cemented crown?
What is a key advantage of using a screw-retained crown over a cement-retained crown, as implied by the speaker?
What is a key advantage of using a screw-retained crown over a cement-retained crown, as implied by the speaker?
According to the speaker, what is a potential consequence of leaving behind cement when placing a cemented crown?
According to the speaker, what is a potential consequence of leaving behind cement when placing a cemented crown?
What does the speaker suggest as a solution to the difficulty in ensuring complete cement removal when placing a cemented crown?
What does the speaker suggest as a solution to the difficulty in ensuring complete cement removal when placing a cemented crown?
Flashcards
Screw Retention and Microfractures
Screw Retention and Microfractures
When a screw is used to retain a dental crown, having a hole in the center can weaken the surrounding area, making it prone to tiny fractures and eventually breaking.
Cement Retention and Fracture Prevention
Cement Retention and Fracture Prevention
Using cement to hold a crown in place eliminates the risk of fractures and tiny fractures associated with screw retention.
Jaw as a Lever
Jaw as a Lever
The jaw operates like a class three lever, with the back (posterior) region having less space compared to the front (anterior).
Posterior Crown Placement
Posterior Crown Placement
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Screw Retention for Posterior Crowns
Screw Retention for Posterior Crowns
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Cement Retention and Aesthetics
Cement Retention and Aesthetics
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Cement Retention and Restorative Failure
Cement Retention and Restorative Failure
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Advantages of Cement Retention
Advantages of Cement Retention
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Disadvantages of Cement Retention
Disadvantages of Cement Retention
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Disadvantages of Screw Retention
Disadvantages of Screw Retention
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Ideal Implant Placement
Ideal Implant Placement
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Angulation Deviation and Complications
Angulation Deviation and Complications
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Cantilever Structure
Cantilever Structure
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Concave Emergence Profile
Concave Emergence Profile
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Cement and Peri-implantitis
Cement and Peri-implantitis
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Cement Removal Challenges
Cement Removal Challenges
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Importance of Clean Cement Removal
Importance of Clean Cement Removal
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Cement Retention
Cement Retention
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Screw Retention
Screw Retention
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Cantilever
Cantilever
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Emergence Profile
Emergence Profile
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Peri-implantitis
Peri-implantitis
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Abutment
Abutment
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Posterior Region
Posterior Region
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Angulation
Angulation
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Class Three Lever
Class Three Lever
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Crown
Crown
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Dental Implant
Dental Implant
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Long Axis of a Tooth
Long Axis of a Tooth
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Bone Loss
Bone Loss
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Study Notes
Porcelain Fractures and Screw Retention
- Having a hole in the middle of the crown can lead to compromised areas around the screw, making them prone to micro fractures and eventual fractures.
- Cement retention eliminates the risk of micro fractures and fractures.
Posterior Region and Jaw Lever
- The jaw is a class three lever, with the least amount of room in the posterior region and the most amount in the front.
- Fitting a crown in the posterior region can be challenging due to limited space and the need for precise angulation.
Screw vs. Cement Retention
- Screw retention allows for easier manipulation in the posterior region.
- Cement retention provides better esthetic results, but can be more difficult to correct angulation.
- Cement retention reduces the risk of screw loosening, but may lead to restorative failure before the abutment shows any signs of failure.
Advantages and Disadvantages of Cement Retention
- Advantages: easier to correct angulation, better esthetic results, and reduced risk of screw loosening.
- Disadvantages: difficulty in retrieving the crown, potential for cement to be left behind, and compromised esthetics.
Disadvantages of Screw Retention
- Difficulty in correcting angulation, potential for screw loosening, and compromised esthetics.
- Advantages: easy to retrieve, and less risk of cement being left behind.
Implant Placement and Angulation
- Ideally, implants should be placed parallel to the long axis of the tooth to direct forces favorably and reduce bone loss and restorative complications.
- Large degrees of deviation can lead to unfavorable forces, less restorative material, and compromised esthetics.
Cantilever and Emergence Profile
- A cantilever is a bridge-like structure that requires at least three millimeters of space from the implant platform to the gingival margin.
- The emergence profile should be concave to allow for cleaning and to prevent plaque and food accumulation.
Leaving Cement Behind
- Leaving cement behind is a major cause of peri-implantitis.
- It can be difficult to identify and remove excess cement due to its opacity and 2D representation on x-rays.
- It is essential to ensure that all cement is removed to prevent complications.
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