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</p> Signup and view all the answers

    Which component contributes to the adhesive properties?

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

    Which component could potentially improve the strength of the adhesive?

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

    Why should heat be absorbed during mixing?

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

    What is the function of water in this context?

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

    Why is it recommended to use a cold glass slab?

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

    How might adding more carboxylic acid impact the adhesive properties?

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

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