Dentin Sealer vs Bonding Systems in Dentistry

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What is the main purpose of a varnish under amalgam restorations?

Increasing microleakage space with amalgam

Enhancing the mechanical interlocking of resin with tooth structure

Preventing pulpal irritation and tooth discoloration (correct)

Sealing dentinal tubules

What is the contraindication of using varnish under resin composite restorations?

Preventing pulpal irritation

Enhancing the mechanical interlocking of resin with tooth structure (correct)

Sealing dentinal tubules

Affecting the adhesive potential of the resin

What is the composition of varnish used under amalgam restorations?

90% organic solvent and 10% natural gum (correct)

70% natural gum and 30% synthetic resin

90% synthetic resin and 10% organic solvent

70% organic solvent and 30% synthetic resin

Why should varnish not be used under glass ionomer cement?

Eliminates the adhesive potential and biocompatibility of the cement Signup and view all the answers

What is the function of solution liners in dentistry?

Providing chemical protection by sealing dentinal tubules Signup and view all the answers

Why is it illogical to use varnish under resin composite restorations?

Hinders mechanical interlocking of resin with tooth structure Signup and view all the answers

What is required in case of shallow tooth excavation (RDT ≥ 2mm) for amalgam restorations?

Solution liner only Signup and view all the answers

In case of moderately-deep caries excavation (RDT=1-2mm), what is needed for resin composite restorations?

Dentin bonding agent Signup and view all the answers

What is the main indication for pulpal protection with Ca(OH)2 according to the text?

Extensive dentin loss (RDT ≤ 0.5mm) Signup and view all the answers

What type of restorative material does not need any pulpal protection according to the text?

Glass Ionomer Cement (GIC) restoration Signup and view all the answers

What is necessary for amalgam restorations in moderately-deep caries excavation (RDT=1-2mm)?

Cement base and solution liner Signup and view all the answers

What is the primary purpose of using a solution liner with amalgam restorations?

Adhesive potential enhancement Signup and view all the answers

What is the purpose of using a dentin sealer in dental procedures?

To seal dentinal tubules and desensitize dentin Signup and view all the answers

Why is a dentin sealer not indicated with resin composite restorations?

It does not produce micromechanical bonding Signup and view all the answers

What is the role of calcium hydroxide when used as a liner in dental procedures?

To stimulate odontoblasts for reparative dentin formation Signup and view all the answers

What are the properties of calcium hydroxide that contribute to its effectiveness as a liner material?

High calcium ion concentration, alkalinity, and antibacterial potential Signup and view all the answers

In what situations is calcium hydroxide generally applied for pulpal medication?

When exposed pulpal tissue is present and the remaining dentin bridge is ≤0.5mm Signup and view all the answers

Why is a dentin sealer not suitable for use with chemically bonded glass ionomer cements?

It interferes with the chemical bonding process of the cement Signup and view all the answers