secondary impressions

Question 1

When you receive your tray from the lab what should you check for

Answer 1

Check it follows the specification you’ve asked for eg stops, handle, perforated or unperforated

Question 2

In regards to the sulcus depth what should our secondary impression be

Answer 2

Should be 2mm short of the full depth of the sulcus

Question 3

What are the purposes of stops in our special tray

Answer 3

To hold the tray away from the model/ tissues so that impression material has got room to flow

Question 4

Where do you usually start doing your border moulding on your second tray

Answer 4

Post dam

Question 5

What should w be careful of when adding our post dam

Answer 5

Careful not to extend the tray too far distally

Question 6

What can be used to record the functional sulcus and post dam

Answer 6

Greenstick or pink stick

Question 7

Describe green Stick

Answer 7

Flowable when warm but hardens quickly at mouth temperature

Question 8

Talk through how we would record the post dam using green stick

Answer 8

1. Dry the tray
2. Warm green stick careful and slowly
3. Apply green stick along the back of the tray on fitting surface
4. Try not to extend to distally
5. TEMPER IN WATER TO DISSIPATE HOT SPOTS
6. Place in mouth
7. Apply firm pressure to back of tray making sure tray is centrally positioned

Question 9

How do we record the functional sulcus depth

Answer 9

1. Dry the tray and heat green stick
2. Apply 2-3 cm sections trying to keep to the outside of the tray
3. Correct positioning with wet hands
4. TEMPER IN WATER TO DISSIPATE HOT SPOTS
5. Once seated in mouth carry out border moulding
6. Remove any material that has gone onto fitting surface with a hot wax knife