Dental Impressions: Materials and Preparation

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What is the primary reason for taking impressions in dentistry?

To create a prescription

To improve communication

To maintain records

All of the above (correct)

What type of impression material is Zinc oxide?

Elastomer

Reversible hydrocolloid

Compound (correct)

Irreversible hydrocolloid

How should the tray be loaded for an impression?

Load the tray with the alginate syringe

Mix the powder and water, then load the tray (correct)

Add Vaseline to the tray before loading

Mix the alginate and then add the powder

What is the recommended way to handle the patient during a maxillary impression?

The operator should be standing Signup and view all the answers

What is the purpose of using Vaseline in an impression?

To remove wax undercuts Signup and view all the answers

How should the tray be selected for an impression?

Based on the anatomy of the teeth Signup and view all the answers

What is the purpose of desinfection in an impression?

To prevent the spread of infection Signup and view all the answers

What is the recommended storage method for irreversible hydrocolloid impressions?

In a 100% humidity environment Signup and view all the answers

What should be reviewed after taking an impression?

The impression for air bubbles, tears, and drags Signup and view all the answers

What is the primary objective of taking impressions in dentistry?

To create a precise model of the patient's mouth Signup and view all the answers

What type of silicone is commonly used in dentistry for impression taking?

Addition silicone Signup and view all the answers

What is the ideal depth for an alginate buccal impression?

3mm Signup and view all the answers

Why is it essential to mix alginate powder and water accurately?

To achieve the correct consistency for impression taking Signup and view all the answers

What is the primary purpose of using wax undercuts in an impression?

To improve the retention of the impression material Signup and view all the answers

What is the recommended method for disinfecting an irreversible hydrocolloid impression?

Disinfecting with a 100% humidity label Signup and view all the answers

What should be checked during the review of an impression?

Air bubbles, tears, and drags Signup and view all the answers

What is the primary advantage of using an anatomy-led tray selection?

Increased accuracy of the impression Signup and view all the answers

What type of impression material is polysulfide?

Elastomer Signup and view all the answers

What is the primary consideration when selecting an impression tray?

The anatomy of the mouth Signup and view all the answers

Why is it important to measure the powder and water accurately when mixing alginate?

To achieve a consistent impression quality Signup and view all the answers

What is the primary purpose of using a reversible hydrocolloid impression?

Not mentioned in the content Signup and view all the answers

What should be done to the teeth before taking an impression?

Clean and dry Signup and view all the answers

What is the primary purpose of reviewing an impression after it has been taken?

All of the above Signup and view all the answers

What is the ideal temperature for mixing alginate?

Not mentioned in the content Signup and view all the answers

Why is it important to communicate with the laboratory during the construction of casts?

To ensure the correct prescription is followed Signup and view all the answers

What should be done to the impression after it has been removed from the mouth?

Disinfect and rinse Signup and view all the answers

What is the primary purpose of using an irreversible hydrocolloid impression?

To create a permanent record Signup and view all the answers