Glass Ionomer Setting Reaction
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Questions and Answers

What is the benefit of Glass Ionomer in patients with high caries index?

  • It has good radio-opacity
  • It provides anti-cariogenic effect (correct)
  • It has high dimensional stability
  • It provides good thermal insulating capacity

    • Why are Glass Ionomers highly biocompatible with the pulp?

  • Due to its low pH when mixed
  • Due to its high acid concentration
  • Due to its high molecular mobility
  • Due to its weak acid and high molecular weight (correct)

    • What is the result of the formation of fluoroapatite and Calcium fluoride crystals in Glass Ionomer?

  • Increased plaque accumulation
  • Leakage and recurrent caries
  • No recurrent caries (correct)
  • Recurrent caries

    • What is the main reason for fluoride release in Glass Ionomer?

    <p>To arrest the remaining caries left in the cavity and avoid pulp exposure</p> Signup and view all the answers

    What is the advantage of low setting contraction of Glass Ionomer?

    <p>Decreased marginal leakage</p> Signup and view all the answers

    Why is Glass Ionomer used as a base and lining material?

    <p>Due to its good thermal insulating capacity</p> Signup and view all the answers

    What is the purpose of surface conditioning in Glass Ionomer?

    <p>To improve the bonding of the restoration</p> Signup and view all the answers

    What is a major disadvantage of Glass Ionomer?

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

    What are the three main properties of Glass Ionomer that dictate the type selected?

    <p>Fluoride release, chemical bond, and esthetics</p> Signup and view all the answers

    What is the purpose of removing undermined enamel in the cavity?

    <p>To allow for a stronger bond between the restoration and the tooth</p> Signup and view all the answers

    What is the type of joint recommended for the cavity preparation?

    <p>CSA à butt joint (90o) without any bevels</p> Signup and view all the answers

    What is the recommended duration for surface conditioning and rinsing in Glass Ionomer?

    <p>10 seconds conditioning and 10 seconds rinsing</p> Signup and view all the answers

    What is the purpose of adding various acids such as itaconic acid, tartaric acid, maleic acid, and tricarbollic acid to glass ionomer?

    <p>To increase the reactivity of the material</p> Signup and view all the answers

    What is the problem that is countered by freeze-vacuum drying the liquid and adding it to the powder?

    <p>Gelation of the liquid</p> Signup and view all the answers

    What is the type of reaction involved in the setting of glass ionomer?

    <p>Acid-base reaction</p> Signup and view all the answers

    What is the primary purpose of using Glass Ionomer as a lining and dentin substitute in the Sandwich technique?

    <p>To act as a thermal insulator below metal</p> Signup and view all the answers

    Which of the following is an indication for using Glass Ionomer in pediatric restoration?

    <p>Pit and Fissure sealant in mixed dentition</p> Signup and view all the answers

    What is the purpose of the ion leaching phase in the setting reaction of glass ionomer?

    <p>To allow migration of ions to the surrounding aqueous solution</p> Signup and view all the answers

    What is the significance of C Factor in Glass Ionomer placement?

    <p>It describes the relation between bonded to unbonded surfaces</p> Signup and view all the answers

    When is the initial clinical set achieved in the setting reaction of glass ionomer?

    <p>After 5-10 minutes of the start of the mix</p> Signup and view all the answers

    What is the purpose of the maturation phase in the setting reaction of glass ionomer?

    <p>To lead to a more rigid cross-linking of the material</p> Signup and view all the answers

    What is the primary advantage of using the Atraumatic Restorative Treatment (ART) technique?

    <p>It allows for treatment of caries with minimal instrumentation</p> Signup and view all the answers

    What is the purpose of excavating the caries in the Atraumatic Restorative Treatment (ART) technique?

    <p>To relieve pain</p> Signup and view all the answers

    What is the type of lesion that is associated with mechanical wear with an external object, such as a toothbrush?

    <p>Abrasive lesion</p> Signup and view all the answers

    What is the proportion of liner/luting cement to base/restoration according to the manufacturer's instructions?

    <p>1.5:1</p> Signup and view all the answers

    What is the recommended way of mixing glass ionomer powder and liquid?

    <p>Mechanical mixing with capsules</p> Signup and view all the answers

    Why is it important to mix the glass ionomer powder and liquid on a cool, clean glass slab?

    <p>To prevent the loss of glossy appearance and hinder its adhesive potentials</p> Signup and view all the answers

    What is the purpose of coating the glass ionomer with a water-proof sealant after matrix removal?

    <p>To develop the physical properties of the glass ionomer</p> Signup and view all the answers

    When should the finishing of the glass ionomer restoration be accomplished?

    <p>After 24 hours of restoration placement</p> Signup and view all the answers

    What is the purpose of using Nanocoat in glass ionomer restorations?

    <p>To improve the physicomechanical properties of the glass ionomer</p> Signup and view all the answers

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