Dental Materials

Question 1

When doing two tone impressions, what’s viscosity of impression material is used where

Answer 1

First use High viscosity to get the bite and general impression of mouth

Next, use Low viscosity around each individual tooth to capture details of each tooth then place the impression tray with original high viscosity material back in to create a Two tone impression

Question 2

Low viscosity more or less accurate

Answer 2

More accurate

Question 3

What characteristics does restorative need

Answer 3

Thermal expansion to prevent micro leakage

Question 4

What is the name of dental stone

Answer 4

Gypsum

Question 5

What is a common material of dentures

Answer 5

Acrylic resin and porcelain

Question 6

Rigidity definition

Answer 6

Rigidity is defined as little chnage in shape when large forces are applied

Question 7

Viscosity definition

Answer 7

Ability to flow

Question 8

Elasticity definition

Answer 8

Ability to return to original shape after removal from the mouth using force

Question 9

Compressive strength vs hardness

Answer 9

Compressive strength is the ability to withstand compression without fracturing

Hardness is the ability of a surface to withstand indentation