Impression techniques
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This document discusses impression techniques and materials for dental implants. It notes that closed tray impressions may be less accurate for multi-unit cases, while open tray impressions may be more accurate but require custom trays due to angulations. Polyvinyl siloxane is recommended as it is very stable in multiple viscosities, while polyether and rubber-base materials are more toxic to bone. The document also discusses managing patient issues during impressions and what information to provide to the dental lab, such as implant level and abutment level impressions and necessary components.
Impression techniques
- 1. Level II: Advanced Implant Placement and Restoration Course Dr. David Dalise Dr. Gary McCabe Ross
- 3. Impression Techniques Closed Tray May be least accurate for multi unit cases. Stock Trays Custom Trays Open Trays May be more accurate for multi unit impressions May be required due to implant/abutment angulations and path of insertion withdrawal. Stock Trays Modifications required Custom Trays
- 4. Impression Materials PVS Minor bone toxicity Very stable Multiple viscosities available Polyether Toxic to bone Very rigid Very Stable Most hydrophilic Rubber base Toxic to bone Relatively Stable Slow set Unpleasant taste to patient Others (hydrocolloids) Least stable Low tear strength Least desirable to use due to limitations of material
- 5. Considerations, Complications, and Solutions What material and why Use a material suitable to situation and operator familiarity Managing difficult patients or situations High anxiety/apprehension IV sedation Non-IV conscious sedation Gag reflex Salt on tongue Non-IV conscious sedation Medical complications Have emergency kit in office and appropriate training for use for doctor and staff Bleeding Direct pressure Vasoconstrictor Vessel ligation Appropriate referral/911
- 6. What to send to the Lab? Lab prescription Detailed with all required prosthetic design and case details. Appropriate and accurate impressions Implant level Abutment level Preoperative mounted models Diagnostic wax up Necessary restorative components for implant Implant analog Impression analog Necessary abutment screws Temporary abutments
- 7. Pre Op X-ray
- 13. #8 HS Bur
- 15. Pilot Drill w/out Drill Stops
- 19. Periapical X-ray
- 20. Tissue Punch
- 21. Removal of Tissue Plug
- 24. 3.3mm Osteotome
- 27. 3.5mm Osteotome
- 30. ISI 4mm x 12mm CB
- 31. Placement of ISI with Ultem Cap
- 32. Ratchet Wrench Seating ISI Implant
- 33. ISI Ratcheted to Final Seating
- 34. Torqued to 40+ N/Cm
- 36. Periapical X-ray
- 37. 4.0 TRIP and 4.0 AC
- 38. TRIP “Snapped” Into Margin