18 Questions
Why are anterior extra-coronal restorations in primary teeth more complex?
Due to the larger pulp chamber and thinner enamel and dentin layers
What is a common reason for choosing extraction over restoration in primary teeth?
Poor aesthetics of stainless steel crowns
What is a characteristic of stainless steel crowns in primary teeth restorations?
They are not affected by hemorrhage or moisture
What is a type of crown commonly used in primary teeth restorations?
All of the above
Why may pulpectomy be necessary in primary teeth?
To treat necrotic teeth
What is a benefit of using stainless steel crowns in primary teeth restorations?
They are easy to apply
What is the major drawback of the polycarbonate crown preparation?
Easily removed from the tooth
What is the purpose of creating holes in the palatal surface or incisal edge during crown preparation?
To allow excess material to flow out
What is a common challenge when adjusting the margin of pre-veneered stainless steel crowns?
Chipping off of the white layer
What is the primary consideration for selecting the size of anterior extra-coronal restorations?
Mesio-distal width of the tooth
What is a common issue with the esthetic of pre-veneered stainless steel crowns?
Metallic margin visibility
What is a characteristic of Contemporary restorations, such as Nusmile crowns?
Flexible and durable
What was a major disadvantage of polycarbonate crowns in the 1970s?
They were brittle and prone to fracture and dislodgement
What led to the resurgence in the use of polycarbonate crowns in the 1990s?
New manufacturing techniques that made them thinner and more flexible
What is a major advantage of polycarbonate crowns compared to composite strip crowns?
They are less technique sensitive
Why are polycarbonate crowns not recommended for certain patients?
Because they are not suitable for heavy bruxers
How do polycarbonate crowns compare to stainless steel crowns in terms of placement time?
They take about the same amount of time to place
What is a necessary consideration when preparing a tooth for a polycarbonate crown?
Greater tooth reduction
This quiz covers the characteristics and limitations of polycarbonate as a dental restoration material, including its compromised durability and moisture control. It also outlines the preparation requirements for anterior extra-coronal restorations and cellulous crowns.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
