dental materials final

what does aqueous mean?

contains H2O

all dental cements can be mixed on _____ or _____ with a dental mixing spatula

mixing pad or glass slab

flouride and calcium is released from _____ cement for ____ years and is used primarily in ortho and pedodontics

glass ionomers, 2-5 years

what is the smear layer?

protect prepared dentinal tubules

what is the purpose of fabricating a custom tray?

to create a custom fit for the patient. they can be created for bleaching trays, retainers, snap on smiles and invisalign

etchant is made of:

phosphoric acid

when fabricating a mouth protector, what is considered to be the first step taken in its fabrication?

take an alginate impression

another name used to describe a permanent cement is:

luting agent

the purpose of a composite dental bonding material is to:

bond restorative materials to the tooth surface

what is the purpose of a protective base?

protect the pulp from any type of irritation or thermal change

which of the following cements have exothermic properties?

ZnP

which filler type of composite resin material has the strongest particles and has been used most commonly for posterior restorations but posses NO shine?

macro-filled

which of the following provides “STOPS” within a custom tray?

three to four holes cut into the baseplate wax

select the mixture of metals that help make up the allow powder of amalgam

silver, tin, copper, zinc

the chemical process of combining a monomer and a polymer is called:

polymerization

which of the following dental cements MUST be mixed on a glass slab?

zinc phosphate (ZnP)

when a cement is classified as an intermediate cement it is expected to last ___ in the oral cavity

6 months

when triturating amalgam, if the freshly mixed amalgam material is dull and crumbly and cannot be manipulates, the amalgam is said to be:

undermixed

what is the name of a liquid material used in dentistry that is highly toxic because it begins to evaporate and release dangerous vapors and fumes in the air in room temp?

mercury

polycarboxylate cement is also known as:

polyacrylic

what is the liquid component of acrylic?

methylmethacrylate

what is the purpose of eugenol as a medicament in ZOE

to soothe the irritated pulp

which of the composite materials is most used today due to its versatile use?

hybrid type

what is excess amalgam called?

scrap amalgam

what does ZOE stand for?

zinc oxide eugenol

acrylic in dentistry can be used to fabricate:

custom trays, dentures, retainers

what does ZnP stand for?

zinc phosphate

what does IRM stand for?

intermediate restorative material

name (3) dental materials that have an exothermic reaction

acrylic resin, polycarboxylate, zinc phosphate, stone

how does an auto-cures material harden and set?

a chemical reaction

what does SDS stand for?

safety data sheet

what is the name of the federal regulatory agency that deals with the issues of concern to the environment and the disposal of hazardous chemical and materials in dentistry?

EPA

what is the ideal temperature for glass slab use in order to maintain a correct mix?

68 degrees

when mixing a self curing acrylic, the order it cures is:

sandy, sticky, doughy, hard

the weakest silver alloy is:

spherical

_____ is a gelatin-type material derived from seaweed found in a reversible hydrocolloid material

agar