Restorative and Laboratory Materials (Restorative Materials and Matrix and Wedge) Flashcards
What is the main material of amalgam?
mercury
Where is amalgam used and why?
posterior teeth bc it looks buns
What is a low-copper alloy?
comminuted and spherical particles
What is a high-copper alloy?
comminuted, speherical, or combination (admiz)
What are spherical alloys?
smoother srufaces that need less mercury
What are combination alloys?
adapt better to the cavity prep and produce better contacts
Mercury is the only metal that is?
liquid state and vaporizes at a low temp
What is trituration?
combining dental alloy and mercury mechanically
What is amalgamation?
chemical reaction between the alloy and mercury that forms amalgam
What are the steps for a complete amalgam procedure?
Administer anesthetic.
Place the rubber dam.
Apply liners, bases, and bonding agents.
Assemble the matrix and wedge.
Mix, place, condense, and finish the amalgam restoration.
What is a composite reso material composed of?
organic polymer matrix
inorganic filler particles
organic siliane-coupling agent
What filler particle size are in macrofilled composite?
1-3 microns
What filler particle size are in microfilled composite?
0.01-0.1 microns
What filler particle size are in hybrid composite?
both macro and micro filled
What is a packable composite sometimes called?
condensable composite
What is a Class I restoration?
posterior restoration with no matrix because only occlusal is involved
What is a Class II restoration?
posterior restoration with a clear matrix band, retainer, and wedges
What is a Class IV restoration?
anterior restoration with proximal surface and incisal edge
What is a Class V restoration?
gingival or root, one-third restoration that may not require a matrix
