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Dental Materials > Chapter 10 > Flashcards

Chapter 10 Flashcards

1
Q

Definition of alloy

A

mixture of two or more metals

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2
Q

Definition of high-noble alloy

A

alloy containing at least 60% noble metals, 40% of which must be gold

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3
Q

Definition of base-metal alloy

A

alloy composed of non-noble metals (corrodes more readily)

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4
Q

Definition of noble alloy

A

alloy composed of metals that do not corrode readily

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5
Q

Definition of precious metal

A

classification of metal based on its high cost

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6
Q

Definition of porcelain bonding alloys

A

special casting alloys manufactured for their compatibility with porcelain that has been bonded to them at high temperatures

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7
Q

Definition of coping

A

thin covering like a thimble that serves as substructure for a porcelain-bonded-to-metal crown

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8
Q

Definition of firing

A

process of heating porcelain at high temperature until it fuses

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9
Q

Definition of sintering

A

process whereby particles are heated to the point that they fuse together at their borders but do not clump into one solid mass

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10
Q

Definition of yield strength

A

amount of stress at which a substance deforms

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11
Q

Definition of glazing

A

firing porcelain at high temperature to achieve a smooth, shiny surface

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12
Q

Definition of solder

A

alloy used to join two metals together or two repair cast metal restorations

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13
Q

Definition of wrought metal alloy

A

alloy that has been mechanically changed into another form to improve its properties

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14
Q

Definition of anneal

A

modify physical properties of a metal by heating it

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15
Q

Definition of nitinol

A

alloy of nickel and titanium often used for orthodontic wires

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16
Q

Definition of gauge

A

measure of the thickness of a wire; lower the gauge, thicker the wire

17
Q

Definition of post

A

metal or nonmetal dowel placed within the root canal to retain a core buildup

18
Q

Definition of active post

A

post that engages the root canal surface like a screw

19
Q

Definition of passive post

A

post that sits in the prepared canal space but does not actively engage the root surface

20
Q

Definition of custom post

A

post cast to fit precisely in the root canal space

21
Q

Definition of pre-formed post

A

factory-made post supplied in several sizes

Dental Materials (16 decks)

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