10 Questions
What is the primary function of H+ ions in the provided process?
To break down alumino-silicate particles
What is the significance of Ca++ ions in the reaction?
They react with H+ ions to form a byproduct
What is the role of AS in the reaction?
It is a reactant that reacts with Ca++ ions
What is the net result of the reaction between H+ ions and alumino-silicate particles?
Breakdown of alumino-silicate particles
What is the significance of the 22 label in the diagram?
It represents the pH level of the reaction
What is the purpose of the Al+++ ions in the reaction?
None of the above
What is the relationship between H+ ions and alumino-silicate particles?
H+ ions break down alumino-silicate particles
What is the significance of the W symbol in the diagram?
It represents the reactant AS
What is the net result of the reaction between Ca++ ions and AS?
Formation of a new compound
What is the significance of the Fl symbol in the diagram?
It represents the byproduct of the reaction
Study Notes
Glass Ionomer Cement (GIC)
- Developed in 1965 by Dr. Alan Wilson and Dr. Brian Kent at the British Laboratory of the Government Chemist
- First synthesized in 1969 by Wilson and Kent
- First GIC product, ASPA (Alumino-Silicate-Poly-Acrylate), was introduced in 1971
- GIC gained popularity in 1972 due to its adhesion to enamel and dentin and fluoride release for anticariogenic effect
History and Development
- 1975: Dr. John McLean developed clinical techniques and demonstrated the material's resistance to caries
- 1983: To improve the abrasive resistance, GIC was modified by adding silver to develop Miracle Mix or Silver Cermet by Simmons
Setting Reaction
- Acid attack: calcium ions (Ca++) are released, and alumino-silicate particles are attacked by H+ ions
- Gelation: calcium ions react with polyacrylic acid to form a gel
- Maturation: the gel transforms into a solid matrix
Properties
- Acid-base reaction
- Adhesion to enamel and dentin
- Fluoride release for anticariogenic effect
- Resistance to caries
Types and Classifications
- Not specified in the text
Advantages and Disadvantages
- Not specified in the text
Indications and Contraindications
- Not specified in the text
Test your knowledge of pre-clinical operative dentistry with this quiz, covering various aspects of dental care and treatment.
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