Implants - Lecture 8: Impression Techniques Flashcards
Accurate impressions ensure the _________ ______ of prosthetic components
proper fit
Accurate impressions minimize complications like what?
Misfits
Occlusal issues
Accurate impressions enhance pt _____________ with long-term outcomes
satisfaction
When taking an impression, look for a material that has _____________ _________ over time
dimensional stability
The impression material should have _________ resistance for multiple pours
tear
The impression material should be ___________ with implant components
compatible
What impression material do we use for implant impressions?
PVS (polyvinyl siloxane)
Accurate implant impressions record the _______ position of the __________ in the oral cavity
3D; implant
The benefits of impressions in implant dentistry are to record what 4 things?
Position
Depth
Angulation
Soft tissue contour (emergence profile)
What are the 2 impression techniques?
Abutment level
Implant level
Impression of an abutment either directly using conventional techniques or indirectly using an abutment impression coping
Abutment level
Impression of the implant platform using an implant impression coping
Implant level
Technique where impression copings remain in the mouth during tray removal
Closed tray (indirect impression)
Relies on replacing copings into the impression after removal
Closed tray (indirect impression)
Indications:
Single units
Limited interach distance
Sufficiently parallel Implants
When have a mixture of implants and natural crown teeth for one impression
Closed tray (indirect impression)
Complications:
Inaccuracy when repositioning the impression copings
Less reliable for multiple implants or angulated cases
Closed tray (indirect impression)
Align the flat sides of the impression coping to the ____________ and ____________
mesial; distal
T/F: Take an X-Ray of the impression coping to verify seating
True
What should you do to the tray before taking an impression?
Paint it with adhesive
Before taking the closed tray impression, place the ________ on top of the impression coping (make sure you hear a click)
cap
What should you load around the impression coping?
Light body
What should you load in the tray?
Heavy body
After taking the closed tray impression, connect the _____________ to the impression coping before snapping it to the cap on the tray
analog
Technique where impression copings protrude through a hole in the tray
Open tray (direct impression)
Direct pickup of the copings
Open tray (direct impression)
Indications:
Single units
Multiple units that need to be splinted
Implants with unsufficient parallel to allow the impression to be withdrawn
Open tray (direct impression)
Complications:
Difficulty when positioning the tray
“Locked in” if you do not expose the impression coping
Open tray (direct impression)
Before taking the open tray impression, verify where you will need to cut the _________ on the tray
hole
Before taking the open tray impression, you want to cut a hole wide enough to have access to the _________
screw
After taking the open tray impression, verify the screw is free of any ___________ ____________
impression material
(be sure to pick out the impression material from the screw)
After taking the open tray impression, ___________ before removing the tray from the pt’s mouth
unscrew
After taking the open tray impression and removing the tray from the pt’s mouth, connect the ____________ to the impression coping in the tray
analog
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 _____________ __________
separating agent
After painting on a thin coat of separating agent, syringe the _________ __________ material around the analog and surrounding areas
soft tissue
T/F: Do NOT load interproximal areas with soft tissue material
True
How high should you build up the soft tissue material?
3mm - 1cm
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?
Floss
(and use gauze in the pt’s mouth)
T/F: Soft tissue material is used after closed tray AND open tray impressions
True
