Border Molding

Question 1

The custom tray should extend to ____ mm short of the depth of the vestibule.

Answer 1

2

Question 2

Which area is typically under-recorded in the impression?

Answer 2

lingual frenum

Question 3

Over-extension of the impression will result in ______.

Answer 3

overextended flanges and sore spots

Question 4

What should the patient do with their tongue during the impression?

Answer 4

Raise it to the roof of the mouth, then stick in out in all directions

Question 5

How do you mark frenums in the patient’s mouth?

Answer 5

with an indelible transfer stick

….indelible? something that will not be removed easily

Question 6

If using green compound (we used PVS), you must ____ the compound over a broad area.

Answer 6

Heat

Question 7

After heating the compound, how do you place it into the custom tray?

Answer 7

allow it to “sag into the tray”

-do HALF THE MOUTH at a time-

Question 8

Before inserting the tray with compound into the patient’s mouth, what should you do?

Answer 8

TEMPER the compound to ensure that is just above the fusion temperature (140 degrees)

Question 9

What is the fusion temperature of green compound?

Answer 9

140 degrees F

Question 10

When inserting the tray, you should stand at ____o’clock and pull the lips up/over the tray.

Answer 10

7

Question 11

What do you look for when inspecting the tray/compound?

Answer 11

no show-throughs
adequate thickness
trim away any excess after border-molding is complete

Question 12

True or False: Compound will not stick to a wet tray.

Answer 12

True

Question 13

Before trimming excess compound, you must _____ it.

Answer 13

chill

Question 14

After trimming: heat compound with torch, temper in hot water, and then ________.

Answer 14

reinsert in the mouth….chill…dry

Question 15

What do you do after border molding?

Answer 15

1. apply adhesive to custom tray

2. take the final impression

Question 16

How do you prepare the impression material (if you’re not using PVS material)?

Answer 16

3 strips of base + 3 strips of catalyst

• use three tongue blades
• use the tip of the blade and swirl the base and catalyst
• toss the first blade
• fill the custom tray from one side to the other, avoid air bubbles by adding small increments and pushing the material in front of the blade (not dragging it)

Question 17

True or False: you must hold the tray firmly in place during the entire impression.

Answer 17

True

Question 18

What does “tray movement” cause?

Answer 18

folds and flash

Question 19

What is impregum?

Answer 19

the polyether tray impression material

-we used medium body for the border and light body for the impression

Question 20

When making the custom tray, how many layers of base plate wax did we place?

Answer 20

two

Question 21

What goes on top of the wax?

Answer 21

• First Triad model releasing agent (vaseline)

- Then Triad Material

Question 22

The triad material should be trimmed to _______.

Answer 22

match the wax beneath it

Question 23

Place a _______ handle for the mandibular tray.

Answer 23

vertical

Question 24

How thick should the custom tray be?

Answer 24

1.0-1.5 mm thick all the way around and 1.0-2.0 mm short of the depth of the vestibule

Question 25

How do you check for buccal over-extension of the tray?

Answer 25

Place in the patient’s mouth and pull on cheeks/lips, if the tray is displaced, look in the mouth to figure out where it was caught

Question 26

How do you check for lingual over-extension of the tray?

Answer 26

Place the tray in the patient’s mouth and have him/her stick out their tongue (up, down, side to side)

Question 27

When you see displacement of the tray, how far back should you trim?

Answer 27

1 to 2 mm from the reflection

Question 28

Besides sticking their tongue out, what other facial movements might you have the patient make?

Answer 28

“Pucker” in order to assist in keeping the tray seated until material sets

Question 29

What is the setting time for “Impregum Penta Soft Quick Step Medium Body?” What is the working time?

Answer 29

4 min setting time

1 min working time

Question 30

What is the setting time for “Impregum Soft Quick Step Tray?” What is the working time?

Answer 30

4 min setting time

1 min working time

Question 31

Both Polyether impression materials (medium and soft), are considered _______ setting material.

Answer 31

quick

Question 32

How long do you allow the tray adhesive to dry before apply the tray material?

Answer 32

30-60 seconds (or longer…up to 15 mins)

Question 33

Prepare a cast from the impression with a commercial specialized stone plaster no earlier than _______ and no later than ______ after taking the impression

Answer 33

30 minutes

14 days