Waxes Tutorial

Quiz
•
Other
•
University
•
Hard
zira yusof
Used 5+ times
FREE Resource
14 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which of the following is true of residual stress?
Is developed in wax when it is cooled under stress
Results in a uniform dimensional change that can be compensated for in the casting process
Can be minimized by the manipulation of a wax at a temperature as high as is practical
Can cause warpage that increases at higher storage temperatures and during longer storage times
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A pattern wax might be used to do which of the following?
Make a corrective impression
Form a mold around an impression
Form the general size and contour of a restoration
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Casting waxes possess useful properties, such as which of the following?
Tackiness
No residue other than carbon
Minimum values of flow at mouth temperaturemperature
Specified values of coefficient of thermal expansion
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which of the following statements are true?
Boxing wax is used for forming a mold around an impression before a gypsum cast is poured
Utility wax must stick to itself
Utility wax is used to prevent sad and distortion of alginate impression
Sticky wax is used to assemble metallic or resin pieces in a fixed temporary position and is brittle at room temperature
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which of the following statements apply to bite-registration waxes?
They are used to articulate models of opposing quadrants accurately.
Formulations are made from carnauba wax.
The flow of these waxes at 37O C if from 5% to 80%.
These waxes may distort when removed from the mouth.
6.
OPEN ENDED QUESTION
3 mins • 1 pt
You are treating a patient on a hot day, and the office temperature is significantly higher than normal. You notice that when you use a wax bite record to mount cast on your articulator, the occlusal relationship is not correct. Which properties of wax were most likely to be responsible for this problem?
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Answer explanation
Flow and residual stress
7.
OPEN ENDED QUESTION
3 mins • 1 pt
Described the techniques that can be used to limit the problems of residual-stress incorporation in wax?
Evaluate responses using AI:
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Answer explanation
Carve at warm temperature
Add wax in small increments
Redo critical areas if time passes
Avoid elevated temperatures
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