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5th ICP - Endo > Role Tricalcium Silicates > Flashcards

Role Tricalcium Silicates Flashcards

1
Q

Examples of tricalcium silicates?

A

MTA

Biodentine

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2
Q

What is MTA

A

Mineral trioxide aggregate

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3
Q

What is Portland cement?

A

Cement hardens on reaction with water - from water-resistant product

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4
Q

What is MTA like?

A

Portland cement

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5
Q

How does MTA vary from Portland cement?

A

No trace arsenic/ lead
Bismuth oxide added
Smaller and more uniform size particles

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6
Q

What is purpose of bismuth oxide?

A

Radiopacity

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7
Q

Adv of MTA?

A

Can have contact w/ PDL/ cementum - doesn’t cause low grade inflammatory reaction

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8
Q

Characteristics MTA

A 
Biocompatible
Non-toxic
Non-resorable
No leakage
Compressive strength = IRM 
Bactericidal
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9
Q

Use MTA?

A 
Root-end restoration - after surgery 
Repair perforation
Pulp cap
Apexification in immature roots
Repair resorption defect
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10
Q

Why can MTA not be used for bulk restoration?

A

Not strong enough

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11
Q

How use MTA?

A

Mix w/ sterile water glass pad
Add water to maintain correct handling properties
Deliver using appropriate instrument

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12
Q

What to do if placing MTA internally?

A

Place cotton wool pellet to allow to set

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13
Q

How long does MTA take set?

A

On hydration = colloidal gel that solidifies in 3-4 hours

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14
Q

Disadvantages of MTA?

A

Hours set
Can be washed away prior set
Acidic environment will interfere w/ setting process (can’t have infection)
Cost

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15
Q

MTA vs Dycal as pulp capping?

A

Dycal causes inflammation initially followed by inconsistent dentine bridge

MTA - absence of inflammation and consistent bridge formation

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16
Q

Conclusion MTA as pulp capping material?

A

Higher success rate
Less pulpal inflammatory response
More predictable hard dentine bridge formation

17
Q

How long does it take for biodentine to set?

A

9-12 minutes

18
Q

Properties of biodentine?

A

High compressive strength - same as dentine after 28 days

Similar flexural modulus to dentine

19
Q

How differentiate biodentine to dentine?

A

Will cut the same

Differentiate due shade and opacity

20
Q

How does biodentine adhere?

A

Into dentinal tubules and creates tags = micro-mechanical Anchorage

21
Q

Uses biodentine?

A

Similar MTA

22
Q

Indication for biodentine and not MTA?

A

As a bulk restorative material

23
Q

Main adv of tricalcium silicates?

A

When material contacting vital tissues

5th ICP - Endo (7 decks)

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