30 Questions
What is the benefit of Glass Ionomer in patients with high caries index?
It provides anti-cariogenic effect
Why are Glass Ionomers highly biocompatible with the pulp?
Due to its weak acid and high molecular weight
What is the result of the formation of fluoroapatite and Calcium fluoride crystals in Glass Ionomer?
No recurrent caries
What is the main reason for fluoride release in Glass Ionomer?
To arrest the remaining caries left in the cavity and avoid pulp exposure
What is the advantage of low setting contraction of Glass Ionomer?
Decreased marginal leakage
Why is Glass Ionomer used as a base and lining material?
Due to its good thermal insulating capacity
What is the purpose of surface conditioning in Glass Ionomer?
To improve the bonding of the restoration
What is a major disadvantage of Glass Ionomer?
Opacity
What are the three main properties of Glass Ionomer that dictate the type selected?
Fluoride release, chemical bond, and esthetics
What is the purpose of removing undermined enamel in the cavity?
To allow for a stronger bond between the restoration and the tooth
What is the type of joint recommended for the cavity preparation?
CSA à butt joint (90o) without any bevels
What is the recommended duration for surface conditioning and rinsing in Glass Ionomer?
10 seconds conditioning and 10 seconds rinsing
What is the purpose of adding various acids such as itaconic acid, tartaric acid, maleic acid, and tricarbollic acid to glass ionomer?
To increase the reactivity of the material
What is the problem that is countered by freeze-vacuum drying the liquid and adding it to the powder?
Gelation of the liquid
What is the type of reaction involved in the setting of glass ionomer?
Acid-base reaction
What is the primary purpose of using Glass Ionomer as a lining and dentin substitute in the Sandwich technique?
To act as a thermal insulator below metal
Which of the following is an indication for using Glass Ionomer in pediatric restoration?
Pit and Fissure sealant in mixed dentition
What is the purpose of the ion leaching phase in the setting reaction of glass ionomer?
To allow migration of ions to the surrounding aqueous solution
What is the significance of C Factor in Glass Ionomer placement?
It describes the relation between bonded to unbonded surfaces
When is the initial clinical set achieved in the setting reaction of glass ionomer?
After 5-10 minutes of the start of the mix
What is the purpose of the maturation phase in the setting reaction of glass ionomer?
To lead to a more rigid cross-linking of the material
What is the primary advantage of using the Atraumatic Restorative Treatment (ART) technique?
It allows for treatment of caries with minimal instrumentation
What is the purpose of excavating the caries in the Atraumatic Restorative Treatment (ART) technique?
To relieve pain
What is the type of lesion that is associated with mechanical wear with an external object, such as a toothbrush?
Abrasive lesion
What is the proportion of liner/luting cement to base/restoration according to the manufacturer's instructions?
1.5:1
What is the recommended way of mixing glass ionomer powder and liquid?
Mechanical mixing with capsules
Why is it important to mix the glass ionomer powder and liquid on a cool, clean glass slab?
To prevent the loss of glossy appearance and hinder its adhesive potentials
What is the purpose of coating the glass ionomer with a water-proof sealant after matrix removal?
To develop the physical properties of the glass ionomer
When should the finishing of the glass ionomer restoration be accomplished?
After 24 hours of restoration placement
What is the purpose of using Nanocoat in glass ionomer restorations?
To improve the physicomechanical properties of the glass ionomer
This quiz covers the setting reaction of Glass Ionomer, including the role of acids and the acid-base reaction involved. It also explores ways to counteract the problem of gelation that occurs in the liquid.
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