Implants - Lecture 8: Impression Techniques

Question 1

Accurate impressions ensure the _________ ______ of prosthetic components

Answer 1

proper fit

Question 2

Accurate impressions minimize complications like what?

Answer 2

Misfits
Occlusal issues

Question 3

Accurate impressions enhance pt _____________ with long-term outcomes

Answer 3

satisfaction

Question 4

When taking an impression, look for a material that has _____________ _________ over time

Answer 4

dimensional stability

Question 5

The impression material should have _________ resistance for multiple pours

Answer 5

tear

Question 6

The impression material should be ___________ with implant components

Answer 6

compatible

Question 7

What impression material do we use for implant impressions?

Answer 7

PVS (polyvinyl siloxane)

Question 8

Accurate implant impressions record the _______ position of the __________ in the oral cavity

Answer 8

3D; implant

Question 9

The benefits of impressions in implant dentistry are to record what 4 things?

Answer 9

Position
Depth
Angulation
Soft tissue contour (emergence profile)

Question 10

What are the 2 impression techniques?

Answer 10

Abutment level
Implant level

Question 11

Impression of an abutment either directly using conventional techniques or indirectly using an abutment impression coping

Answer 11

Abutment level

Question 12

Impression of the implant platform using an implant impression coping

Answer 12

Implant level

Question 13

Technique where impression copings remain in the mouth during tray removal

Answer 13

Closed tray (indirect impression)

Question 14

Relies on replacing copings into the impression after removal

Answer 14

Closed tray (indirect impression)

Question 15

Indications:

Single units
Limited interach distance
Sufficiently parallel Implants
When have a mixture of implants and natural crown teeth for one impression

Answer 15

Closed tray (indirect impression)

Question 16

Complications:

Inaccuracy when repositioning the impression copings
Less reliable for multiple implants or angulated cases

Answer 16

Closed tray (indirect impression)

Question 17

Align the flat sides of the impression coping to the ____________ and ____________

Answer 17

mesial; distal

Question 18

T/F: Take an X-Ray of the impression coping to verify seating

Answer 18

True

Question 19

What should you do to the tray before taking an impression?

Answer 19

Paint it with adhesive

Question 20

Before taking the closed tray impression, place the ________ on top of the impression coping (make sure you hear a click)

Answer 20

cap

Question 21

What should you load around the impression coping?

Answer 21

Light body

Question 22

What should you load in the tray?

Answer 22

Heavy body

Question 23

After taking the closed tray impression, connect the _____________ to the impression coping before snapping it to the cap on the tray

Answer 23

analog

Question 24

Technique where impression copings protrude through a hole in the tray

Answer 24

Open tray (direct impression)

Question 25

Direct pickup of the copings

Answer 25

Open tray (direct impression)

Question 26

Indications: Single units Multiple units that need to be splinted Implants with unsufficient parallel to allow the impression to be withdrawn

Answer 26

Open tray (direct impression)

Question 27

Complications: Difficulty when positioning the tray “Locked in” if you do not expose the impression coping

Answer 27

Open tray (direct impression)

Question 28

Before taking the open tray impression, verify where you will need to cut the _________ on the tray

Answer 28

hole

Question 29

Before taking the open tray impression, you want to cut a hole wide enough to have access to the _________

Answer 29

screw

Question 30

After taking the open tray impression, verify the screw is free of any ___________ ____________

Answer 30

impression material (be sure to pick out the impression material from the screw)

Question 31

After taking the open tray impression, ___________ before removing the tray from the pt's mouth

Answer 31

unscrew

Question 32

After taking the open tray impression and removing the tray from the pt's mouth, connect the ____________ to the impression coping in the tray

Answer 32

analog

Question 33

After taking the impression and the analog has been connected to the impression coping, verify that the components are seated completely, and then paint on a thin coat of _____________ __________

Answer 33

separating agent

Question 34

After painting on a thin coat of separating agent, syringe the _________ __________ material around the analog and surrounding areas

Answer 34

soft tissue

Question 35

T/F: Do NOT load interproximal areas with soft tissue material

Answer 35

True

Question 36

How high should you build up the soft tissue material?

Answer 36

3mm - 1cm

Question 37

What should you tie around the implant screwdriver for ease of access of recovery if it were to fall into the oral cavity to avoid swallowing?

Answer 37

Floss (and use gauze in the pt's mouth)

Question 38

T/F: Soft tissue material is used after closed tray AND open tray impressions

Answer 38

True