Dentin Sealer vs Bonding Systems in Dentistry
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Questions and Answers

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?

<p>Eliminates the adhesive potential and biocompatibility of the cement (B)</p> Signup and view all the answers

What is the function of solution liners in dentistry?

<p>Providing chemical protection by sealing dentinal tubules (B)</p> Signup and view all the answers

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

<p>Hinders mechanical interlocking of resin with tooth structure (D)</p> Signup and view all the answers

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

<p>Solution liner only (D)</p> Signup and view all the answers

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

<p>Dentin bonding agent (C)</p> Signup and view all the answers

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

<p>Extensive dentin loss (RDT ≤ 0.5mm) (D)</p> Signup and view all the answers

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

<p>Glass Ionomer Cement (GIC) restoration (A)</p> Signup and view all the answers

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

<p>Cement base and solution liner (A)</p> Signup and view all the answers

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

<p>Adhesive potential enhancement (B)</p> Signup and view all the answers

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

<p>To seal dentinal tubules and desensitize dentin (A)</p> Signup and view all the answers

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

<p>It does not produce micromechanical bonding (C)</p> Signup and view all the answers

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

<p>To stimulate odontoblasts for reparative dentin formation (A)</p> Signup and view all the answers

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

<p>High calcium ion concentration, alkalinity, and antibacterial potential (A)</p> Signup and view all the answers

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

<p>When exposed pulpal tissue is present and the remaining dentin bridge is ≤0.5mm (D)</p> Signup and view all the answers

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

<p>It interferes with the chemical bonding process of the cement (D)</p> Signup and view all the answers

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