Impression Techniques Flashcards
Why doe accurate impressions matter?
Ensures proper fit of prosthetic components
Minimizes complications like misfits and occlusal issues
Enhances patient satisfaction with long-term outcomes
What to look for in a impression material
Dimensional stability over time
Tear resistance for multiple pours
Compatibility with implant components
What impression material do we use for implants
Polyvinyl Siloxane
Importance of accurate impressions in implant dentistry
Accurate implant impression records the three-dimensional position of the implant in the oral cavity
The benefits of impression in implant dentistry are to record:
Position
Depth
Angulation
Soft tissue contour (emergence profile)
2 types of impression techniques
Abutment level
Implant level
Impression techniques - Abutment level
Impression of an abutment either directly using conventional techniques or indirectly using an abutment impression coping
(Picture)
Impression techniques - Implant level
Impression of the implant platform using an implant impression coping
Types of Implant level impression techniques
Open tray or closed tray
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 for closed tray impression
Single units
Limited interarch distance
Sufficiently parallel implants
When have a mixture of implant and natural crown teeth for one impression
Complications of closed tray impression
Inaccuracy when repositioning the impression copings
Less reliable for multiple implants or angulated cases
In the closed tray technique, align the flat sides of IC to
mesial and distal
(Picture)
Place the __ on top of the IC
cap (it needs to hear a click)
(Look at pictures of closed tray process)
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 for open tray direct impressions
Single units
Multiple units that need to be splinted
Implants with no sufficient parallel to allow the impression to be withdrawn
Complications for open tray direct impressions
Difficulty when positioning the tray
“Locked in” if you do not expose the impression coping
Look at pictures for walk through of open tray technique
Pictures in powerpoint
Soft tissue material
Look at pictures on how to apply
DO not load interproximal areas with material
Build up to approximately 3mm -1 cm
Use gauze and ligate floss around the __
implant screwdriver for ease of access of recovery if it were to fall into the oral cavity to avoid swallowing
