Dental Materials Quiz #1

How can a chemical enter our bodies ?

Ingestion, Inhalation, invasion directly through a break in the skin, direct contact with skin or eyes

What should be on SDS sheets ?

First aid, chemical list, manufactures

What does stress mean ?

Force exerted from within an object

What is corrosion ?

Deterioration from acid exposure

What are three qualities of the oral environment that can affect dental material ?

PH, moisture, stress

What is hardness ?

Resistance of an object to penetration

What is dual set ?

When both UV light and a chemical reaction are used

What is microleakage ?

Expansion and contraction of dental material

What is chronic chemical toxicity ?

Repeated chemical exposure over a long period of time

What does compressive mean

The force applied to squeeze an object

What is initial set ?

When the material can no longer be manipulated

What are three ways to manipulate setting time ?

Temperature, mixing technique, ratio

What does the ADA have to do with dental materials ?

Responsible for setting standard of materials

What does strain mean ?

The amount of change a force produces

What is mixing time ?

The time required to bring both parts to a homogenous mix

Is fluoride gel a thixotropic liquid ?

Yes

What is final set ?

When material has reached its ultimate state

What labels are needed if a chemical is not in its original container ?

Name, manufacture, hazard info, expiration date

What does shearing mean ?

The force of two surfaces sliding over one another

What does stiffness mean ?

Resistance to deformation

How do we protect the public with lab cases ?

By disinfecting incoming and outgoing lab cases

What does the FDA have to do with dental materials ?

Responsible for setting standard of materials

What is malleability ?

The ability to be formed without fracture

What does light activated mean ?

This is when UV light is used to initiate a reaction

What is OSHA ?

The organization that protects employees

What is acute chemical toxicity ?

High levels of chemical exposure over a short period of time

What is PPE ?

Personal Protective Equipment

What is ductility ?

The amount of dimensional change withstood

What does biocompatibility mean ?

The ability of a material to not harm tissue

What does this image show ?

Mechanical retention

What does elasticity mean ?

The ability of a material to stretch and return to original state

What does resilience mean ?

The ability to absorb energy without deformation

What does tensile mean ?

The force applied to stretch an object

What is chemical set ?

This is when a chemical reaction is used to set material

What is working time ?

This is the amount of time used to manipulate material in the mouth

What is torsion ?

The amount of force to twist an object

What does viscosity mean ?

The ability of a liquid to resist flow