Dental Restoration Materials and Preparation
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Questions and Answers

Why are anterior extra-coronal restorations in primary teeth more complex?

  • Because of the smaller pulp chamber
  • Due to the larger pulp chamber and thinner enamel and dentin layers (correct)
  • Due to the hard enamel and dentin layers
  • Because of the smaller dentin layer

    • What is a common reason for choosing extraction over restoration in primary teeth?

  • Higher cost of composite resin crowns
  • Difficulty in etching the enamel
  • Poor aesthetics of stainless steel crowns (correct)
  • Inability to use pre-veneered stainless steel crowns

    • What is a characteristic of stainless steel crowns in primary teeth restorations?

  • They are aesthetically pleasing
  • They are expensive
  • They are not affected by hemorrhage or moisture (correct)
  • They are difficult to apply

    • What is a type of crown commonly used in primary teeth restorations?

    <p>All of the above</p> Signup and view all the answers

    Why may pulpectomy be necessary in primary teeth?

    <p>To treat necrotic teeth</p> Signup and view all the answers

    What is a benefit of using stainless steel crowns in primary teeth restorations?

    <p>They are easy to apply</p> Signup and view all the answers

    What is the major drawback of the polycarbonate crown preparation?

    <p>Easily removed from the tooth</p> Signup and view all the answers

    What is the purpose of creating holes in the palatal surface or incisal edge during crown preparation?

    <p>To allow excess material to flow out</p> Signup and view all the answers

    What is a common challenge when adjusting the margin of pre-veneered stainless steel crowns?

    <p>Chipping off of the white layer</p> Signup and view all the answers

    What is the primary consideration for selecting the size of anterior extra-coronal restorations?

    <p>Mesio-distal width of the tooth</p> Signup and view all the answers

    What is a common issue with the esthetic of pre-veneered stainless steel crowns?

    <p>Metallic margin visibility</p> Signup and view all the answers

    What is a characteristic of Contemporary restorations, such as Nusmile crowns?

    <p>Flexible and durable</p> Signup and view all the answers

    What was a major disadvantage of polycarbonate crowns in the 1970s?

    <p>They were brittle and prone to fracture and dislodgement</p> Signup and view all the answers

    What led to the resurgence in the use of polycarbonate crowns in the 1990s?

    <p>New manufacturing techniques that made them thinner and more flexible</p> Signup and view all the answers

    What is a major advantage of polycarbonate crowns compared to composite strip crowns?

    <p>They are less technique sensitive</p> Signup and view all the answers

    Why are polycarbonate crowns not recommended for certain patients?

    <p>Because they are not suitable for heavy bruxers</p> Signup and view all the answers

    How do polycarbonate crowns compare to stainless steel crowns in terms of placement time?

    <p>They take about the same amount of time to place</p> Signup and view all the answers

    What is a necessary consideration when preparing a tooth for a polycarbonate crown?

    <p>Greater tooth reduction</p> Signup and view all the answers

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