Chapter 27 Taking impressions and pouring dental casts

Question 1

What type of patients do you not take impressions on?

Answer 1

• Braces
• Fixed ortho retainers (Okay)
• Mobile teeth
• A temp crown

Question 2

How long do you wait to disinfect your bowl and spatula?

Answer 2

• Let soak for 1 minute
• rinse with tap water and dry

Question 3

What are some steps for taking impressions?

Answer 3

• Lubricate patients lips with vaseline prior
• estimate tray size
• be careful of mandibular tori
• flulff alginate powder (tumble then wait 30 seconds)

Question 4

What type of water should be used?

Answer 4

COLD water because warm water will cause alginate to set very quickly

Question 5

Mixing time ?

Answer 5

Gently moisten powder
mix for smooth product
use side of bowl to press mixture eliminate bubbles

Question 6

How do you load tray?

Answer 6

• load from back
• continue to fill tray
• use finger and cold water to smooth the top
• spread alginate over occlusal surfaces (reduce bubbles)