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EFDA(midterm) > Amalgam > Flashcards

Amalgam Flashcards

1
Q

How many lingual pits preparation shapes are there

A

3 an oval, circle, triangle

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2
Q

What are the 1st 3 steps for placing amalgam restorations

A

Mixing, placing, and condensing

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3
Q

What are the Advantages to using composite material in posterior teeth

A

Esthetics and marginal integrity

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4
Q

After removing the band from a class ll prep with composite. What do you do next.

A

Cure the buccal and lingual surfaces to make sure it has hardened (polymerization)

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5
Q

What’s the proper matrix technique for restoring a posterior prep with composite

A

Prewedge, dead soft metal band/tofflemire holder

Wedge, ring matrix system(garrison)

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6
Q

What is part of the correct placement of composite while filling the prep.

A

Place and cure increments of no more than 2mm at a time

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7
Q

Anatomy can be placed in a completed posterior composite, with which rotary instrument

A

Finishing diamond burs & multi fluted carbide finishing burs

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8
Q

The finishing process should correct what on a composite filling

A

Flash

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9
Q

Post op sensitivity experienced after a composite posterior restoration is a result of what.

A

Premature occlusion
Etch was not rinsed correctly
Saliva contamination

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10
Q

What bur should be used to define central grooves on posterior composite.

A

Tapered shape finishing bur

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11
Q

What is the photochemical initiator in composite that causes it to harden

A

BIS-GMA(Resin)

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12
Q

How will the tooth shade appear if the shade is chosen while the tooth is isolated

A

Lighter in color than the tooth structure

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13
Q

What is the function of pit and fissure sealants.

A

Acts as a barrier to prevent caries.

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14
Q

What is the most common reason for sealant failure

A

Saliva contamination

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15
Q

When using partially filled sealant material. The efda has to consider what.

A

Occlusal adjustment

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16
Q

What is the 1st step in the placement of a pit and fissure sealant

A

Flour of pumice to smooth the surface.

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17
Q

If saliva contamination occurs after etching but before sealant placement. What should you do.

A

The enamel must be re-etched

18
Q

Coronal polishing involves removing what

A

Supragingival extrinsic strain from the clinical crown

19
Q

Does bevelse need to be placed on the occlusal surface for increased retention?

A

No

20
Q

What is the hardest tissue in the body and is very brittle

A

Enamel

21
Q

What purposes does contact areas serve. (Teeth touching)

A

Keeps food from packing between the teeth and to help stabilize the dental arches

22
Q

What area does the anatomical crown of tooth consist of

A

The portion that extends from the incisal or occlusal surface to the enamel junction with the cementum of the root

23
Q

What area of the tooth does the clinical crown consist of

A

The visible portion of the anatomical crown from the occlusal or incisal to the Crest of the soft tissue. (Gingiva)

24
Q

What class restoration needs a tofflemire and band.

A

Class ll

25
Q

Which cell is responsible for the formation of dentin tissue

A

Cementoblast

26
Q

Which tooth identification system utilizes two digits. With one digit representing the quadrant and the other representing the tooth.

A

FDI. Federal Dentaire International ( 18) Quadrant 1. Tooth 8

27
Q

What tissue is covering the roots of teeth

A

Cementum

28
Q

What part of the tooth contains tubules

A

Dentin

29
Q

What type of dentin is formed by the odontoblast due to excessive stimulus or perceived threat

A

Repairative dentin.(tertiary)

30
Q

What is the term to indicate the junction of three surfaces inside a cavity preparation

A

Point angle

31
Q

What part of the tooth allows for slight movement

A

Periodontal ligament

32
Q

On what tooth is the cusp of carabelli found

A

ML cusp area of maxillary 1st molar.

33
Q

In what direction does the oblique ridge traverse across the occlusal surface

A

Distobuccal cusp to the mesiolingual cusp

34
Q

Which fossae is found in the central portion of a molar

A

Central fossae

35
Q

What is Amalgam

A

It is combination of metals and is referred to as an alloy

36
Q

What is the composition of dental alloys in an amalgam

A

Silver (40%-60%) adds strength and decreases expansion
Copper (low5% or high 13%-30%)
Tin (22%30%) helps in combining the mercury with alloy
Zinc (0%-2%)prevents oxidation. Reduces brittleness

37
Q

What is the purpose of inorganic fillers in composite

A

To increase strength

38
Q

Composites are categorized based on which of the following about fillers.

A

Amount, size, composition

39
Q

Which of the following makes up the organic resin matrix of composite

A

Bis-gma

40
Q

Conventional types of composite have large hard filler particles making it more susceptible to what

A

Staining

41
Q

Which size of fillers do hybrid type composites contain

A

Small and large size filler particles

42
Q

When are bevels placed on an anterior tooth prep.

A

To improve marginal deal and retention. Removes the outer layer of fluoride rich enamel. Provides more surface area for bonding

EFDA(midterm) (1 decks)

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