1. Which of the following is incorrect for the die model? a. The part that imitates the crown of the prepared tooth shou

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1 Which Of The Following Is Incorrect For The Die Model A The Part That Imitates The Crown Of The Prepared Tooth Shou 1 (69.58 KiB) Viewed 15 times

1. Which of the following is incorrect for the die model? a. The part that imitates the crown of the prepared tooth should be the same size and volume as the tooth to be restored. b. Root pin sizes need to be similar to a normal tooth root. c. The most commonly used material in die model making is stone. d. The pin should extend to the collum of the tooth to be restored, and should be at the same distance from all surfaces. e. The most applied method in practice is the pin technique. 2. Which of the following statements about impression materials are correct? I. Calcium sulfate hemihydrate, calcium sulfate, dihydrate is obtained by calcining in various ways. Type 1 zinc oxide eugenol impression paste hardens faster than type 2 and has a more rigid structure. III. The lower the temperature of the impression compound at the time of taking the impression, the greater the error that occurs. IV. The curing time is extended by adding a drop of water during mixing of the zinc oxide eugenol impression material. II. V. a. I, IV I. II. III. Impression plaster is used in mucocompressive impression technique. b. II, III c. I, II d. III, V 3. What can be done to compensate partially for the casting shrinkage of the alley? To add silica e. III, IV Increase t/r ratio Use of thermal expansion of the investment.