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Module 3 Dental Materials > Protecting the Pulp > Flashcards

Protecting the Pulp Flashcards

1
Q

What are phosphoric acid based cements made up of?

A

Zinc oxide (powder) and phosphoric acid (liquid)

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2
Q

What type of reaction for phosphoric acid based cements?

A

exothermic

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3
Q

Why do you introduce powder incrementally into liquid?

A

increase working time

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4
Q

How long after phosphoric acid based cements go hard?

A

4-7 minutes

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5
Q

Do phosphoric acid based cements have a high or low pH and molecular weight?

A

low pH and molecular weight

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6
Q

Is phosphoric acid based cement radiolucent or radiopaque?

A

radiopaque

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7
Q

What is zinc oxide eugenol cement made up of?

A

eugenol and zinc oxide

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8
Q

What does zinc acetate do?

A

create ionic medium to foster set

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9
Q

How is zinc oxide eugenol cement set?

A

chelation

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10
Q

Is zinc oxide eugenol cement radiolucent or radiopaque?

A

radiopaque

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11
Q

What is zinc oxide eugenol cements incompatible with?

A

resin composites

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12
Q

What are the two pastes in calcium hydroxide cement?

A

glycol salicylate and zinc oxide with calcium hydroxide

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13
Q

In calcium hydroxide cements, what does the high pH give?

A

beneficial irritancy and renders it bactericidal

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14
Q

Is calcium hydroxide radiopaque or radiolucent?

A

radioapaque

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15
Q

What can calcium hydroxide cement not withstand?

A

Insufficient strength to withstand amalgam condensation

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16
Q

Components of polycarboxylates?

A

zinc oxide (powder) and polyacrylic acid (liquid)

17
Q

What kind of reaction for polycarboxylates?

A

acid base reaction

18
Q

What does polycarboxylates have a strong bond to?

A

stainless steel

19
Q

What do polycarboxylates have a weak bond to?

A

gold and non-existent to porcelain

20
Q

In polycarboxylates, what render them bacteriostatic?

A

fluroride

21
Q

What do polcarboxylates have a strength for?

A

amalgam

22
Q

What does the high mw parent acid render in GI?

A

mildly irritant

23
Q

GI are bacteriostatic due to what?

A

fluoride release

24
Q

New development for composite bulk fill?

A

smart dentin replacement

25
Q

What feature does smart dentin replacement have?

A

flowable composite with delayed and reduced shrinkage

26
Q

What is a Bulk Dentine replacement?

A

Biodentine

27
Q

What does Biodentine do?

A

formation of reparative dentine

Module 3 Dental Materials (8 decks)

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