25 Questions
Which type of stone is recommended for opening proximal contacts?
Fine Tapered (needle) stone
What is the recommended thickness for the chamfer finish line?
0.3-0.5 mm
At what angle should the tapered with round end stone be slanted at the buccal incline of the buccal cusp?
45°
What is the purpose of the functional cusp bevel?
Retention, Resistance & Structural durability
What should be the position of the chamfer finish line?
Supragingival
In the context of crown preparation, what is the recommended occlusal reduction following anatomy?
1.5mm at both cusps and 1mm at fossae and marginal ridges.
What is the purpose of the 45˚ incisolingual bevel in crown preparation for all ceramic crowns?
To oppose forces on incisal edge and prevent Porcelain shearing.
What is the recommended degree of convergence between opposing surfaces in functional cusp bevel preparation?
6º
What does the term 'partial veneer crown (metal)' refer to in crown restoration?
An extra-coronal restoration that covers only part of the clinical crown with metal.
What is the recommended facial reduction in crown preparation for structural durability?
2 planes, 1mm reduction - cervical half, 1mm reduction - incisal half.
What should be the position of the chamfer finish line in crown preparation?
Supragingival
What type of stone is recommended for opening proximal contacts in crown preparation?
Fine Tapered (needle) stone
What is the recommended degree of convergence between opposing walls in crown preparation for structural durability?
6°
What is the purpose of the 45˚ incisal-lingual bevel in crown preparation for all ceramic crowns?
Preventing damage to adjacent teeth
What is the recommended thickness for the chamfer finish line in crown preparation?
0.3-0.5 mm
What does the term 'partial veneer crown (metal)' refer to in crown restoration?
Retention, Resistance & Structural durability
What is the recommended incisal reduction for all ceramic crown preparation?
1.5mm
What is the purpose of the 45˚ incisolingual bevel in crown preparation for all ceramic crowns?
To oppose forces on incisal edge
What is the recommended degree of convergence between opposing surfaces in functional cusp bevel preparation?
45˚
What should be the thickness of the chamfer finish line in crown preparation?
0.5mm
What type of stone is recommended for opening proximal contacts in crown preparation?
Tapered stone with round end
What is the purpose of the functional cusp bevel in crown preparation?
To ensure proper functional adaptation and durability
What is the recommended facial reduction in crown preparation for structural durability?
1mm reduction -cervical half, 1mm reduction -incisal half
What should be the angle of the tapered stone with round end slanted at the buccal incline of the buccal cusp?
45˚
In crown preparation, what is the recommended occlusal reduction following anatomy?
1.5mm at both cusps, 1mm at fossae and marginal ridges.
Test your knowledge on the preparation of complete metal cast crowns and reduction of posterior and anterior teeth. This quiz covers important aspects such as occlusal surface guiding grooves, axial surfaces, finish line alignment grooves, functional cusp bevel, and evaluation criteria.
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