Amalgam Flashcards
Formula for dental amalgam
Silver alloy + mercury
Dental amalgam? (4)
Qualified under restorative material Used to fill up class 1&2 cavities Some instances, class 3 distal cuspids Select class 5 posterior
Formula for silver alloy
Silve + copper + tin
Manual mix instrument
Mortar & pestle
Mechanical mix instrument
Amalgamator
Freshly mix amalgam appears?
Putty like for 1st 4-5 mins
Final set?
24 hours
Advantages of amalgam (4)
Low cost
Easy to manipulate
Ease placement technique
Ideal longevity
Color of low copper content
Dark gray
Color of high copper content
Light gray
Material used for high copper content
Euginole amalgam
Advantages of high copper content
Higher strength
Less corrosion
Longer life
Types of silver alloy (3)
Irregular/ laphe cut
Spherical
Spheroidal
(Admixed) - irregular + spherical
___ has faster setting than irregular.
Spherical
Steps of mixing amalgam (manual mix)
Mix silver alloy + mercury via mortar & pestle
Place it on squeeze cloth/ cheesecloth
Wring out excess mercury
Apply amalgam mask to the cavity using amalgam carrier
Types of amalgam carrier
Lever type
Push type
Disadvantages of alternatives of amalgam
Expensive
Limited longevity
Difficulty in placement
It uses trituration machine / amalgamator
Amalgamation method/ trituration technique
Amalgamation?
Reaction of mixing alloy & mercury
Trituration?
Process of mixing silver alloy + mercury to form dental amalgam
2 types of capsule
Premeasured capsule
Empty capsule w/ pestle inside
Premeasured capsule?
Contains alloy + mercury
Disposable
Advantages of Premeasured capsule (3)
Proper ratio of alloy to mercury
Limits handling pure mercury
Keeps mercury clean
