Fundamentals of Adhesion Quiz

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Questions and Answers

Which mechanism of adhesion involves interlocking of the adhesive with irregularities in the surface of the substrate?

  • Adsorption adhesion
  • Cohesion
  • Mechanical adhesion (correct)
  • Electrostatic adhesion

What is the term for the attachment of molecules of one substance to the molecules of a different substance when brought into intimate contact?

  • Adsorption adhesion (correct)
  • Electrostatic adhesion
  • Cohesion
  • Mechanical adhesion

What are the primary forces of bonding in adsorption adhesion?

  • Dipole interaction
  • Van der Waals forces
  • Hydrogen bonds
  • Covalent bonds (correct)

What type of interaction is electrostatic adhesion based on?

<p>Electrostatic interaction (B)</p> Signup and view all the answers

Which tooth substrate has a high surface energy allowing good wettability?

<p>Enamel (C)</p> Signup and view all the answers

Which component is considered as the adhesive material that is applied to the tooth substrate?

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

What is the purpose of enamel etching in adhesive dentistry?

<p>Increase the surface energy and dissolve mineral content (D)</p> Signup and view all the answers

What is the role of smear layer in tooth substrate?

<p>Produces high microporosities containing saliva, bacteria, and microorganisms (B)</p> Signup and view all the answers

How does a good adhesive system in dentistry achieve wetting?

<p>By flowing easily over the substrate to produce good wetting (B)</p> Signup and view all the answers

What is the main characteristic of dentinal fluid in tooth substrate?

<p>It is always under constant pulpal pressure (D)</p> Signup and view all the answers

What is the function of adhesive material in dentistry?

<p>To produce a strong initial bond to resist resin shrinkage (D)</p> Signup and view all the answers

What is the primary purpose of etching in etch-and-rinse adhesives systems?

<p>To increase the surface energy and dissolve mineral content (D)</p> Signup and view all the answers

In dental adhesives classification, what is the characteristic of self-etch adhesives systems?

<p>'All-in-one' adhesives that combine self-etching primer and adhesive in one step (D)</p> Signup and view all the answers

What is the effect of new dentin bonding systems in relation to the smear layer?

<p>They remove or greatly alter the smear layer before bonding (A)</p> Signup and view all the answers

What is the purpose of phosphoric acid etching in etch-and-rinse adhesives systems?

<p>Increase the surface energy and dissolve mineral content (B)</p> Signup and view all the answers

What are the indications for using resin composites?

<p>Full veneers and diastema closures (B)</p> Signup and view all the answers

What is the role of smear plugs in tooth substrate?

<p>Loosely attached to the dentin contains microorganisms (B)</p> Signup and view all the answers

What is a disadvantage of resin composites?

<p>High polymerization shrinkage leading to gap formation (B)</p> Signup and view all the answers

When are resin composites contraindicated?

<p>Patients with bad oral hygiene and high caries index (B)</p> Signup and view all the answers

What is the role of resin composites in periodontal splinting and bonding of orthodontic brackets?

<p>Used for bonding of orthodontic brackets (B)</p> Signup and view all the answers

What is an advantage of resin composites?

<p>Minimum interfacial staining (D)</p> Signup and view all the answers

What is the function of the stabilizer or inhibitor system in resin composites?

<p>Maximize the product’s storage life (D)</p> Signup and view all the answers

In what type of cavity preparation are resin composites simple and easy to use?

<p>Class I restorations (C)</p> Signup and view all the answers

What is the primary function of the coupling agent in resin composites?

<p>Allow proper stress distribution between resin and fillers (C)</p> Signup and view all the answers

What is the role of the inorganic filler in resin composites?

<p>Decrease water sorption (C)</p> Signup and view all the answers

Which type of composite contains photo-sensitive chemical such as camphorquinone?

<p>Light cured composite (A)</p> Signup and view all the answers

What is the primary purpose of the activator/initiator system in resin composites?

<p>Initiate the polymerization process (B)</p> Signup and view all the answers

In resin composites, large amounts of inorganic fillers cause a marked increase in what property?

<p>Viscosity (B)</p> Signup and view all the answers

What is the main characteristic of macro-filled composites?

<p>Fulfilling 75-80% of filler loading (B)</p> Signup and view all the answers

What type of resin contains both high and low molecular weight monomers?

<p>$Bis-GMA$ or $UDMA$ system (B)</p> Signup and view all the answers

Which type of filler is present in micro-filled composites?

<p>$Small$ particles of silica (micro-filler) (B)</p> Signup and view all the answers

What do hybrid resins contain?

<p>$Both$ large and small particles of silica (macro and micro-filler) (C)</p> Signup and view all the answers

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