CON-B tutorial 12: important factors to consider when placing direct composite resin restorations Flashcards

1
Q

If caries is deep and the pulp may be stressed, what should we place?

A

Provisional restorative material i.e glass ionomer/calciu silicate cement

This can help re-mineralise the dentine and encourage pulpal healing.

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2
Q

What is dentine hybridisation?

A

Resin materials infiltrate and bond with exposed collagen network WITHIN the dentine

-Creating a hybrid layer

-Hybrid layer enhances bond strength between the tooth structure and the restorative material.

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3
Q

What is enamel resin tag formation?

A

-Resin material penetrates the etched enamel surface.

-Etched enamel = micropores/roughened surface allows resin to seep through creating resin tags.

-Establishes strong mechanical bond between enamel and resin

image on doc

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4
Q

What do we need for good dentine bonding?

A

-Dissolved smear layer
-High quality hybrid layer

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5
Q

What is MDP?

A

-10-Methhacryloyloxydecyl Dihydrogen Phosphate

-Has affinity for hydroxyapatite. When applied, MDP forms chemical bonds with Ca2+ in the tooth structure, leading to a durable bond.

-Has a hydrophillic group- allows it to interact with dentine

-Hydrophobic group - allows it to interact with resin.

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6
Q

Why is the addition of an intermediate flowable composite layer a good idea?

A

-Increased adhesion for all tested materials

-good for small cavities

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7
Q

Why is it crucial that the correct flowable composite is used?

A

Flowable composite can reduce gap formation if it has high elastic modulus.

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8
Q

What technique should you use when placing a conventional composite?

A

Incremental filling technique

WITH GOOD MOISTURE CONTROL

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9
Q

Why is it important to use incremental filling?

A

-Less shrinkage

-Stronger bonding to the cavity floor

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10
Q

What can a CR with higher diffuse transmission result in

A

Superior shade bledning in the margin, without bevels

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