12 Questions
What is the primary reason alginate is more popular than agar for dental impressions?
Alginate is simpler to use
Which of the following is NOT a recommended use of alginate impressions?
Cavity preparation
What is the purpose of the potassium sulphate in the composition of alginate?
To counteract the inhibiting effect of the alginate on the setting gypsum
What is the role of the calcium sulphate dihydrate in the composition of alginate?
To provide calcium ions for the reaction
What is the purpose of the sodium sulphate in the composition of alginate?
To control the working time
What is the primary purpose of the fillers in the composition of alginate?
To control the consistency of the mixed alginate
What is the purpose of the quaternary ammonium compound in alginate impression materials?
To provide antimicrobial properties and self-disinfection
What is the purpose of the organic glycol in alginate impression materials?
To act as a wetting agent and reduce dust during dispending
What is the purpose of the reactive indicator in some alginate impression materials?
To provide a color change when the impression is fully set
What is the recommended technique for mixing alginate impression material?
All of the above
What is the purpose of the sudden, snap removal of the alginate impression from the patient's mouth?
To minimize distortion of the impression during removal
What is the recommended time frame for pouring the cast from an alginate impression?
Within 15 minutes of making the impression
Explore the characteristics and uses of alginate, an irreversible hydrocolloid widely used in dental impressions. Learn why it is preferred over agar, its applications for dental prosthesis and orthodontics, and its limitations. Test your knowledge on alginate in dentistry with this quiz!
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