Chemistry Lab Techniques
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Questions and Answers

What is the recommended mixing time for incorporating the powder when making a mixture?

  • 15 seconds
  • 45 seconds (correct)
  • 2 minutes
  • 1 minute

What role does diacrylate monomer play in the context provided?

  • Contributes to adhesion (correct)
  • Enhances flexibility
  • Provides color
  • Increases viscosity

How should the mixing motion be described when incorporating the powder in a mixture?

  • Employing stropping motion with broad strokes (correct)
  • Stirring gently
  • Vigorously shaking
  • Using circular motions

How can the setting reaction be slowed down when mixing?

<p>By using a broad spatula and a cold glass slab (A)</p> Signup and view all the answers

Which component contributes to the adhesive properties?

<p>Carboxylic acid (D)</p> Signup and view all the answers

What would be the consequence of mixing the powder for only 15 seconds instead of the recommended time?

<p>The mixture will be too thin (B)</p> Signup and view all the answers

What happens if the powder is added gradually instead of all at once as recommended?

<p>The mixture will become lumpy (C)</p> Signup and view all the answers

Why is it important to mix using broad strokes during the last 30 seconds of incorporating the powder?

<p>To ensure even distribution of ingredients (D)</p> Signup and view all the answers

Which component could potentially improve the strength of the adhesive?

<p>Multifunctional acrylate-phosphate monomer (D)</p> Signup and view all the answers

Why should heat be absorbed during mixing?

<p>To slow down the setting reaction (C)</p> Signup and view all the answers

What is the function of water in this context?

<p>Increases reactivity (C)</p> Signup and view all the answers

Why is it recommended to use a cold glass slab?

<p>To slow down the setting reaction (B)</p> Signup and view all the answers

Which component of temporary crown materials is responsible for protecting the pulp from acidic, toxic, or resin materials?

<p>The low strength bases and liners (D)</p> Signup and view all the answers

How might adding more carboxylic acid impact the adhesive properties?

<p>Decrease adhesion (D)</p> Signup and view all the answers

What function does the barrier created by low strength bases and liners serve in temporary crown materials?

<p>Safeguarding the pulp from chemical exposure (A)</p> Signup and view all the answers

What is the purpose of using temporary cementation?

<p>To check if the patient is comfortable with the restoration (A)</p> Signup and view all the answers

What is the primary purpose of using low strength bases and liners in temporary crown materials?

<p>Form a barrier to protect the pulp from chemicals in restorative materials (D)</p> Signup and view all the answers

What is the purpose of using a broad spatula when mixing?

<p>To slow down the setting reaction (C)</p> Signup and view all the answers

What is the role of the low strength bases and liners in temporary crown materials?

<p>Protect the pulp from chemical damage (A)</p> Signup and view all the answers

Why is it important to see if the patient feels comfortable with a temporary restoration?

<p>To ensure patient satisfaction and comfort before finalizing (B)</p> Signup and view all the answers

What might happen if a patient is not comfortable with a temporary restoration?

<p>The patient might experience discomfort with the final restoration (A)</p> Signup and view all the answers

What would happen if a warm glass slab is used during mixing?

<p>The mixture will set faster (D)</p> Signup and view all the answers

How does shade try-in contribute to quality dental care?

<p>By involving patients in decision-making for their restorations (D)</p> Signup and view all the answers

Why are low strength bases and liners considered essential components in temporary crown materials?

<p>To shield the pulp from harmful substances found in restorative materials (A)</p> Signup and view all the answers

What is one of the main reasons for conducting a shade try-in?

<p>To determine if the patient likes the color of the restoration (B)</p> Signup and view all the answers

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