Chapter 14

Question 1

What is the most frequent error in the preparation of study models?

Answer 1

A delay in pouring them

Question 2

_____________ is the process of making a cast smooth and glossy, usually by friction.

Answer 2

Polishing

Question 3

True or False. The mandibular impression should be made first to introduce the patient to the procedure in an area where discomfort or gagging may be least likely.

Answer 3

True

Question 4

List everything that should be done after a maxillary impression is completed

Answer 4

• Remove the impression from the patient’s mouth
• Rinse the impression to remove blood, saliva, and bacteria
• Repeat procedure if substandard impression is present
• Disinfect the impression

Question 5

Suggested documentation for preparation of impressions for study casts include…

Answer 5

• Date
• Patient positioning and special advice
• Materials used; trays; size, plastic or metal
• Problems; patient comments; recommendations

Question 6

When trimming the mandibular cast, what teeth are used as the endpoints of the anterior border?

Answer 6

Canines

Question 7

The cast should be separated from the impression material _____ hour(s) after pouring to preserve accuracy and prevent damage to the surface of the cast.

Answer 7

1

Question 8

How should the mandibular cast be trimmed in the anterior region?

Answer 8

Rounded

Question 9

Which of the following teeth are used in relation to the extremities for trimming the anterior border of the maxillary cast.

Answer 9

Canines

Question 10

After rinsing and evaluating a mandibular impression, what should be completed for a satisfactory impression?

Answer 10

Wrap the mandibular impression in a wet towel while making the maxillary impression

Question 11

What can NOT be used to assist forming the base of a cast?

Answer 11

Mass of stone on a paper towel

Question 12

How should the maxillary cast be trimmed in the anterior region?

Answer 12

To a point