Week 3

Dental Amalgam

100

When two different metals touch each other in the mouth.

Galvanic Shock

200

A combination of several metal elements.

Dental Alloy

300

The RESULT of mixing approximately equal parts by weight of powdered alloy and liquid mercury is called _______ ______?

Dental Amalgam

400

The process of mixing up an amalgam is called?

Amalgamation or Trituration

Using an Amalgamator or a Triturator 

500

The kind of retention amalgam restoration is held together by _____

Macro-Mechanical Retention

Dental Amalgam ...continued

100

Silver+ Tin powdered metal BEFORE mixed with liguid Mercury is ______ ______. 

Amalgam Alloy

200

This metal is added to improve the clinical performance of an Amalgam, to increase strength, reduce corrosion, and break down.

Copper (Cu)

300

The mixture phase of dental amalgam that is the weakest and most corrosion prone is _____. 

Tin+Mercury phase

400

Two kinds of corrosion that leads to recurrent decay are _____ and _____ corrosion. 

1. Surface- discolors that lead to pitting

2. Internal- Interior of restoration, leading to arginal brad down, and sometimes fracture.

500

Small change in shape when an object is under continuous compression is called _____.

Creep

Amalgam+Gold

100

Speherical alloy

200

Lathe-cut alloy, irregular alloy

300

Admixed or blended alloys

400

What GV classification is this gold filling?

Class V

500

Gold foil restoration is also called :

1. Direct Gold

2. Cohesive Gold

Due to cost and aesthetics, direct gold is rarely used. 

Polishing Amalgam+Composites

100

1st stone to use in Amalgam Polishing 

use _____ stone. 

Green Stone

200

2nd stone to use for amalgam polishing is to use 

_____ Stone.

White stone, on slow speed to define occlusal anatomy.

300

3rd stone to use in amalgam polishing is to use

_____ point. 

Brown Point, to minimize scratches.

400

4ths stone to use when polishing amalgam is to use 

_____ point. 

Greenie Point to further polish.

500

Result of poor carving of Amalgam: Name A: B. C

A. Overextension/Flash- extending beyond cavosurface.

B. Submarginal 

C. Openmargin

Polishing Amalgam+Composites

100

What is the purpose of amalgam polishing: 

To produce a restoration that can be easily cleaned by the patient and more compatible with oral health

200

List a benefit of amalgam polishing:

-Smooth and flash cavosurface margins

-Re-creation of defined anatomy

-Decreased plaque retention

-Healthier surrounding tissue

-Higher resistance to tarnish and corrosion

-Increased longevity of the restoration

-Improved esthetics

300

Fill in stone for composite polishing:

1. Dura-___ silicone carbide stones for adjusting

2. Dura-____aluminum oxide stones for finishing

3. CompoSite silicone _____is impregnated with aluminum oxide for polishing

1. Green-for adjusting

2. White-for finishing 

3. CompoSite Silicone Points for polishing

400

____ is produced when using hand piece at high speed with firm pressure. 

HEAT, use low speed and light, intermittent pressure when polishing.

500

___ is the process of abrading a surface to reduce the size of scratches until the surface appears shiny.

 POLISHING

Abrasion

100

Name 1-2 types of Abrasives: 

1. Emery- like (nail file)

2. Silex-quartz -powder form

3. Tin Oxide-Powder form

4. Aluminum Oxide-  bonded to disk and strips

5. Cuttle-

6. Garnet

7. Chalk-mineral form of calcite, can polish teeth, gold, amalgam restorations, and plastic materials.

8. Pumice- used on enamel, gold foil, amalgam, and acrylic denture bases in the laboratory.

9. Sand- form of mineral quartz, bonded to a disk for grinding metals and plastics.

200

List 1-2 factors that influence the rate of abrasion:

•Hardness

•Size

•Shape

•Pressure

•Speed

•Lubrication

300

1. The process of producing the final shape and contour of a restoration _____.

2. Removing materials by shearing off process using dental burs, chisel, spoon, excavator, hoe, hatchet is called _____. 

3. A material is considered ____ when it "wearing away" at a surface. Using disk, stones, wheels, strips, paste...

4. ___ wearing away a surface by grinding producing small scratches. 

1. Finishing

2. Cutting

3. Abrasive

4. Abrasion

400

___ polishing is to polish only the teeth that are stained. 

Selective Polishing, 

**follow manufacturer's recommendations. 

**Enamel is in a constant state of "mineralization flux". Demineralizing at times and remineralizing. 

**If a microscopic layer of enamel is removed from polishing, it will be remineralized by saliva minerals and fluoride exposure. esp if pt gets fluroide tx after polishing. 

500

List some Air Polishing Powders :

1. Sodium Bicarbonate (special processed), uses kinetic energy to propel powder polishingthe tooth surface ideal for heavy stains. (contraindicated for high-blood- pressure, renal disease)

2. Aluminum trihydroxide- alt to Sodium Bicarbonate

3. Glycine powder

4. Calcium Carbonate

5. Calcium Sodium Phosphosilicate

6. Erythritol