Wax Distortion

Question 1

Is the most serious problem one can experience in forming and removing the pattern from a tooth or die.

Answer 1

Distortion of wax patterns

Question 2

True or false.

Distortion of wax pattern results from ocluded air in the pattern physical deformation (during, molding, carving or removal) release of stresses “trapped” during previous cooling, excessive storage time, and extreme temperature changes during storage.

Answer 2

True

Question 3

True or false.

A newly made wax pattern tends to change its shape and size over time.

Answer 3

True

Question 4

True or false.

It is important that the wax pattern be retained on the die for several hours to avoid distortion and ensure that the equilibrium conditions are established.

Answer 4

True

Question 5

Waxes tend to return partially to their original shape after manipulation this is known as?

Answer 5

Elastic memory

Question 6

True or false.

Storage of a wax pattern for too long can lead to a distortion of its form because of stress relaxation effects a casting will fit most accurately when the pattern is invested immediately after its removal from the preparation.

Answer 6

True