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Dental Materials 164
unit 2 PIMA
Question | Answer |
---|---|
The combination of two metals... | Alloy |
Discoloration of amalgam restoration... | Tarnish |
Combination of any metal or alloy... | Amalgam |
An instrument for carrying small masses of freshly mixed amalgam to place in cavity... | Amalgam Carrier |
An instrument for carving a freshly placed amalgam... | Amalgam Carver |
Uniting liquid mercury with alloy... | Amalgamation |
A devise for mixing alloy with mercury to produce amalgam... | Amalgamator |
An instrument for packing amalgam in cavity prep... | Amalgam plugger or condensor |
Metal stainless steel, adapted to a prep cavity to supply missing wall... | Amalgam Matrix |
Mixing of alloy with mercury... | Trituration |
Placing of amalgam into prep cavity... | Condensation |
What is the process by which acrylic resins hardens... | Polymerization (curing) |
Ideally the set amalgam should do what... | Have little dimensional change |
What fillers may be added to composites to make them radiopaque on a radiograph... | Barium glass or Zirconium |
Anticariogenic properties of silicate is due to _____ present.... | Flouride |
What solution is used to acid etch... | Phosphoric acid |
Bonding agents placed under restoration have been found to... | Reduce microleakage |
TorF? A stift metal spatula is used to mix most composites... | False |
Acid etching of enamel by 30% to 50% solution or gel of phosphoric acid improves... | The retention of resin restoration and sealants to the tooth |
Etched emamel appears... | Dull and frosty and whiter than the rest of the tooth |
Estnetic matenals developed to restore severaly eroded cervical areas include... | Glass Ionomers |
The mercury/alloy ratio is_______ spill mercury to one pallet of alloy if the minimal mercury technique... | one |
Amalgam failures may occur in the form of... | recurrent caries fracture dimensional change |
Amalgam that fractures usually do so... | during the first 24hrs after insertion |
The purpose of trituration is to... | mix each alloy particle to mercury |
Moisture contamination of amalgam may cause... | void in final restoration |
If, after the alloy and mercury has been triturated, it is crumbly and dull appearance it may have been... | under mixed |
___________ is toxic, is liquid at room temp and changes to vapor if heated... | mercury |
A health hazard of handling mercury is... | absorption of mercury through skin inhalation vapors inhalation airborne inhalation particles |
Preventive selants placed on... | occlusal surface |
TorF? Use of non-flouride prophy paste is preferred to a flounde prophy paste when cleansing the tooth before placing a pit and fissure sealant... | True |
Contradiction for pit and fissure sealants includes... | deep caries smooth tooth surfaces restrictions in occlusal surfaces |
Application of a sealant requires all of the following except... | Application of fluoride immediately before etching |
TorF? The sealant must have a high viscosity to easily flow into the fissure... | False |
TorF? If salivary contamination of tooth surfaces occurs after etching, or if the etched enamel is not frosty or whiter than non etched enamel, re-etch and rinse the area... | True |
TorF? If salivary contamination of tooth surfaces occur after etching, or if etched enamel is not frosty or whiter than non etched enamel, re-etch and rinse area... | True |
The most common cause of overhangs on a class II amalgam restoration is... | Improper contouring placement of matrix band and wedge |
The primary reason for polishing an amalgam restoration is to... | Reduce surface irregulation |
Amalgam is condensed into a prep tooth by using following dental instrument... | Amalgam plugger |