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Biomaterials Quiz 2
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Biomaterials Quiz 2

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Questions and Answers

Which of the following is true about tooth enamel?

  • It is a soft biomineral
  • It is not involved in biomineralization
  • It is composed mostly of organic components
  • It is composed of apatite fibers (correct)
  • What is biomineralization?

  • The process of replacing organic components with minerals
  • The process of producing minerals to harden or stiffen existing tissues (correct)
  • The process of removing minerals from living organisms
  • The process of breaking down biominerals
  • What is adhesion or adhesive strength in dentistry?

  • The measure of the hardness of an adhesive
  • The measure of the load-bearing capability of an adhesive joint (correct)
  • The measure of the time it takes for an adhesive to set
  • The measure of the amount of adhesive used in a restoration
  • What is microleakage in dentistry?

    <p>The process of creating microporosities in enamel and dentine</p> Signup and view all the answers

    What is dentine?

    <p>A biological composite made up of apatite crystal filler particles in a collagen matrix</p> Signup and view all the answers

    What are dental ceramics used for?

    <p>Tooth repair and replacement</p> Signup and view all the answers

    What are the properties of ceramics used in dentistry?

    <p>Good aesthetics and high compressive strength</p> Signup and view all the answers

    What is zirconia?

    <p>A dense and hard material that is highly biocompatible</p> Signup and view all the answers

    What are the methods used for surface conditioning in dentistry?

    <p>Acid etching with hot acids and abrasion with specific burs</p> Signup and view all the answers

    Which of the following is true about tooth enamel?

    <p>It is composed of apatite fibers</p> Signup and view all the answers

    What is biomineralization?

    <p>The process of producing minerals to harden or stiffen existing tissues</p> Signup and view all the answers

    What is adhesion or adhesive strength in dentistry?

    <p>The measure of the load-bearing capability of an adhesive joint</p> Signup and view all the answers

    What is microleakage in dentistry?

    <p>The process of creating microporosities in enamel and dentine</p> Signup and view all the answers

    What is dentine?

    <p>A biological composite made up of apatite crystal filler particles in a collagen matrix</p> Signup and view all the answers

    What are dental ceramics used for?

    <p>Tooth repair and replacement</p> Signup and view all the answers

    What are the properties of ceramics used in dentistry?

    <p>Good aesthetics and high compressive strength</p> Signup and view all the answers

    What is zirconia?

    <p>A dense and hard material that is highly biocompatible</p> Signup and view all the answers

    What are the methods used for surface conditioning in dentistry?

    <p>Acid etching with hot acids and abrasion with specific burs</p> Signup and view all the answers

    Which of the following materials is used in orthopedics and can become harder when zirconia particles are added to it?

    <p>Alumina</p> Signup and view all the answers

    What is microleakage in dentistry?

    <p>A problem when considering adhesion in dentistry</p> Signup and view all the answers

    What is biomineralization?

    <p>The process by which living organisms produce minerals to harden or stiffen existing tissues</p> Signup and view all the answers

    What is the composition of tooth enamel?

    <p>A hard biomineral composed of apatite fibers and is almost fully deprived of organic components</p> Signup and view all the answers

    What is the measure of the load-bearing capability of an adhesive joint called?

    <p>Adhesion</p> Signup and view all the answers

    What is dentine?

    <p>A porous biological composite made up of apatite crystal filler particles in a collagen matrix</p> Signup and view all the answers

    What are dental ceramics used for?

    <p>Tooth repair and replacement</p> Signup and view all the answers

    What is zirconia?

    <p>A material that is used for tooth repair and replacement and has high aesthetics</p> Signup and view all the answers

    What surface conditioning method is used to modify zirconia surface properties for durable and hydrolytically stable adhesion?

    <p>Selective infiltration etching</p> Signup and view all the answers

    Study Notes

    Dental Materials and Techniques: Biomineralization, Adhesive Restorations, and Dental Ceramics

    • Tooth enamel is a hard biomineral composed of apatite fibers and is almost fully deprived of organic components.
    • Biomineralization is the process by which living organisms produce minerals to harden or stiffen existing tissues.
    • Adhesion or adhesive strength is the measure of the load-bearing capability of an adhesive joint, and it involves the contact between the adhesive and adherend surface, reduced stress concentration at the interface, and protection from the oral environment.
    • Microleakage is a problem when considering adhesion in dentistry, and phosphoric acid demineralizes enamel and dentine by removing calcium, creating microporosities, and increasing surface free energy.
    • Dentine is a porous biological composite made up of apatite crystal filler particles in a collagen matrix, and it can be bonded using etch and rinse adhesives or self-etch adhesives.
    • Dental ceramics are used for tooth repair and replacement, are biocompatible, and have high aesthetics, but they require etching prior to adhesion and can be classified according to their firing temperature.
    • Ceramics have properties such as high compressive strength, low tensile strength, a coefficient of thermal expansion that matches that of enamel and dentine, and good aesthetics, but they can be affected by the hostile oral environment.
    • Ceramic materials used in dentistry include glass-ceramics, hybrid ceramics, and polycrystalline ceramics, which have different qualities and indications.
    • Alumina is a hard and crystalline material that is used in orthopedics and can become harder when zirconia particles are added to it.
    • Zirconia is dense and hard, highly biocompatible, slightly soluble in water, and has a higher bending strength than alumina.
    • Surface conditioning methods such as grit blasting, pyrochemical silica coating, tribochemical silica coating, hydrofluoric acid etching, and zirconia surface treatment are used to modify surface properties for durable and hydrolytically stable adhesion.
    • Zirconia surface treatment involves acid etching with hot acids, abrasion with specific burs, coating with porcelain micro pearls, selective infiltration etching, air abrasion with alumina, and lasers.

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    Description

    Test your knowledge on dental materials and techniques with this quiz! From the biomineralization of tooth enamel to the use of adhesive restorations and dental ceramics, this quiz covers a range of topics related to dental materials and techniques. You'll learn about the properties of different ceramic materials used in dentistry, surface conditioning methods for durable adhesion, and the challenges posed by the oral environment. Take this quiz to see how much you know about the science behind dental restorations and replacements.

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