Which of the following Gold casting alloys are available: A. Medium alloy “Type II” B. ard alloy “Type III” C. Extra ard alloy “Type IV” D. All of the above

Which of the following Gold casting alloys are available:
A. Medium alloy “Type II”
B. ard alloy “Type III”  
C. Extra ard alloy “Type IV”
D. All of the above
by

1 Answer

Answer :

D. All of the above
by

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Titanium is used in dentistry A. In a very pure form in implants B. In an alloy with aluminium in casting for crowns and bridges C. In an alloy with nickel in orthodontic wires D. A and B E. A, B and C

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A large amalgam core is to be condensed around several pins in a vital molar tooth; what type of amalgam mix would you prefer: A. A large mix to ensure homogeneity B. A large with extra mercury to give easier manipulative qualities C. Several small mixes, sequentially triturated D. Several small mixes with varying mercury/alloy ratios E. A basic mix to which additional mercury is added as needed

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The contraction of gold alloys on solidifying is approximately: A. 0.5% B. 2.5% C. 1.40% D. 3%

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Two alloys contain platinum and gold in the ratio of 1:2 and 1:3 respectively. A third alloy C is formed by mixing alloys one and alloy two in the ratio of 3:4. Find the percentage of gold in the mixture a) 79.2/7% b) 71.2/7% c) 73.2/7% d) 71.3/7% e) None of these

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Marginal leakage at the proximal gingival cavosurface of a recently restored class II can be caused by: I. Insufficient condensation II. First proximal increment was too large III. Neglecting to wedge the matrix IV. Hand manipulation instead of mechanical V. Debris contamination A. I, II, III B. II, III, IV C. I, II, V D. None of the above E. All of the above

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