Complete Metal Cast Crown Preparation and Tooth Reduction Quiz
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Questions and Answers

Which type of stone is recommended for opening proximal contacts?

  • Tapered with round end stone
  • Fine Tapered (needle) stone (correct)
  • Wheel stone
  • Football stone

What is the recommended thickness for the chamfer finish line?

  • 0.5-0.8 mm
  • 1.0-1.5 mm
  • 0.1-0.3 mm
  • 0.3-0.5 mm (correct)

At what angle should the tapered with round end stone be slanted at the buccal incline of the buccal cusp?

  • 30°
  • 45° (correct)
  • 90°
  • 60°

What is the purpose of the functional cusp bevel?

<p>Retention, Resistance &amp; Structural durability (B)</p> Signup and view all the answers

What should be the position of the chamfer finish line?

<p>Supragingival (D)</p> Signup and view all the answers

In the context of crown preparation, what is the recommended occlusal reduction following anatomy?

<p>1.5mm at both cusps and 1mm at fossae and marginal ridges. (C)</p> Signup and view all the answers

What is the purpose of the 45Ëš incisolingual bevel in crown preparation for all ceramic crowns?

<p>To oppose forces on incisal edge and prevent Porcelain shearing. (B)</p> Signup and view all the answers

What is the recommended degree of convergence between opposing surfaces in functional cusp bevel preparation?

<p>6º (C)</p> Signup and view all the answers

What does the term 'partial veneer crown (metal)' refer to in crown restoration?

<p>An extra-coronal restoration that covers only part of the clinical crown with metal. (D)</p> Signup and view all the answers

What is the recommended facial reduction in crown preparation for structural durability?

<p>2 planes, 1mm reduction - cervical half, 1mm reduction - incisal half. (A)</p> Signup and view all the answers

What should be the position of the chamfer finish line in crown preparation?

<p>Supragingival (B)</p> Signup and view all the answers

What type of stone is recommended for opening proximal contacts in crown preparation?

<p>Fine Tapered (needle) stone (C)</p> Signup and view all the answers

What is the recommended degree of convergence between opposing walls in crown preparation for structural durability?

<p>6° (D)</p> Signup and view all the answers

What is the purpose of the 45Ëš incisal-lingual bevel in crown preparation for all ceramic crowns?

<p>Preventing damage to adjacent teeth (D)</p> Signup and view all the answers

What is the recommended thickness for the chamfer finish line in crown preparation?

<p>0.3-0.5 mm (C)</p> Signup and view all the answers

What does the term 'partial veneer crown (metal)' refer to in crown restoration?

<p>Retention, Resistance &amp; Structural durability (C)</p> Signup and view all the answers

What is the recommended incisal reduction for all ceramic crown preparation?

<p>1.5mm (C)</p> Signup and view all the answers

What is the purpose of the 45Ëš incisolingual bevel in crown preparation for all ceramic crowns?

<p>To oppose forces on incisal edge (D)</p> Signup and view all the answers

What is the recommended degree of convergence between opposing surfaces in functional cusp bevel preparation?

<p>45Ëš (B)</p> Signup and view all the answers

What should be the thickness of the chamfer finish line in crown preparation?

<p>0.5mm (C)</p> Signup and view all the answers

What type of stone is recommended for opening proximal contacts in crown preparation?

<p>Tapered stone with round end (A)</p> Signup and view all the answers

What is the purpose of the functional cusp bevel in crown preparation?

<p>To ensure proper functional adaptation and durability (A)</p> Signup and view all the answers

What is the recommended facial reduction in crown preparation for structural durability?

<p>1mm reduction -cervical half, 1mm reduction -incisal half (B)</p> Signup and view all the answers

What should be the angle of the tapered stone with round end slanted at the buccal incline of the buccal cusp?

<p>45Ëš (B)</p> Signup and view all the answers

In crown preparation, what is the recommended occlusal reduction following anatomy?

<p>1.5mm at both cusps, 1mm at fossae and marginal ridges. (C)</p> Signup and view all the answers

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