Impression Techniques 2.0

Question 1

Fixture/Implant level vs Abutment Level Impressions

Answer 1

• Fixture/Implant:
  
  • Retraction cord not required
  • Open Tray
  • Closed Tray
  • Custom
• Abutment Level:
  
  • Closed Tray Technique for solid Abutments
  • Direct
  • Indirect

Question 2

Open Tray Technique

Answer 2

Implant Level

• Aka Pick-up impression
• Copings have retaining screws that protrude from tray
  
  • unscrew when impression is set
  • coping comes off in tray (Direct Transfer)
  • Analog screwed on coping
• Splinted or Non-Splinted Coping
  
  • Splinted
    
    • connect w/resin or composite
• Hard to do in posterior

Question 3

Closed Tray Technique

Answer 3

• Implant Level
• Aka Transfer Impression
• Coping stays on implant after impression
  
  • analog is attached to it
  • coping placed back in impression
  • soft tissue moulage applied
    
    • simulate soft tissue
    • remove to allow access to platform
• Disadvantage:
  
  • recreate exact orientation of coping in impression
    
    • inaccurate

Question 4

Custom Tray Technique

Answer 4

Implant Level

• AKA customized impression transfer technique
• Uses in anterior esthetic zone
  
  • creates good emergence profile
• Done w/rigisil in a cup

Question 5

Direct Impression Technique

Answer 5

Abutment Level

• Impression directly on abutment
  
  • pour stone model
  • send to lab

Question 6

Indirect Impression Technique

Answer 6

• Abutment Level
• Attach impression sleeves
  
  • add transfer die in plastic sleeve
  • add soft tissue moulage on impression
  • send to lab

Question 7

Digital Impressions

Answer 7

• Can be abutment or implant level