Fundamentals of Adhesion Quiz

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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?

Electrostatic interaction Signup and view all the answers

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

Enamel Signup and view all the answers

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

Adhesive bonding agent Signup and view all the answers

What is the purpose of enamel etching in adhesive dentistry?

Increase the surface energy and dissolve mineral content Signup and view all the answers

What is the role of smear layer in tooth substrate?

Produces high microporosities containing saliva, bacteria, and microorganisms Signup and view all the answers

How does a good adhesive system in dentistry achieve wetting?

By flowing easily over the substrate to produce good wetting Signup and view all the answers

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

It is always under constant pulpal pressure Signup and view all the answers

What is the function of adhesive material in dentistry?

To produce a strong initial bond to resist resin shrinkage Signup and view all the answers

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

To increase the surface energy and dissolve mineral content Signup and view all the answers

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

'All-in-one' adhesives that combine self-etching primer and adhesive in one step Signup and view all the answers

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

They remove or greatly alter the smear layer before bonding Signup and view all the answers

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

Increase the surface energy and dissolve mineral content Signup and view all the answers

What are the indications for using resin composites?

Full veneers and diastema closures Signup and view all the answers

What is the role of smear plugs in tooth substrate?

Loosely attached to the dentin contains microorganisms Signup and view all the answers

What is a disadvantage of resin composites?

High polymerization shrinkage leading to gap formation Signup and view all the answers

When are resin composites contraindicated?

Patients with bad oral hygiene and high caries index Signup and view all the answers

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

Used for bonding of orthodontic brackets Signup and view all the answers

What is an advantage of resin composites?

Minimum interfacial staining Signup and view all the answers

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

Maximize the product’s storage life Signup and view all the answers

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

Class I restorations Signup and view all the answers

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

Allow proper stress distribution between resin and fillers Signup and view all the answers

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

Decrease water sorption Signup and view all the answers

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

Light cured composite Signup and view all the answers

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

Initiate the polymerization process Signup and view all the answers

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

Viscosity Signup and view all the answers

What is the main characteristic of macro-filled composites?

Fulfilling 75-80% of filler loading Signup and view all the answers

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

$Bis-GMA$ or $UDMA$ system Signup and view all the answers

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

$Small$ particles of silica (micro-filler) Signup and view all the answers

What do hybrid resins contain?

$Both$ large and small particles of silica (macro and micro-filler) Signup and view all the answers