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Final (crown) impression setup

Also called: VPS impression setup, final impression

Setup for an accurate impression of a crown prep with VPS material.

For a crown or bridge, the lab needs a very accurate impression. Retraction cord is placed, then light-body material is put around the prepared tooth through a small tip while heavy-body material fills a tray (often a triple tray). The patient bites or the tray is held until it sets. Every office's tray list is a little different; this is a common example. Follow your office's tray card.

How to spot it

  1. Impression gun with two cartridges, mixing tips and a triple tray.

On the tray, in order

  1. 1. Retraction cord and cord packer
  2. 2. Impression gun with light-body cartridge, mixing tip and intraoral tip
  3. 3. Heavy-body material (gun or mixer) and tray or triple tray
  4. 4. Bite registration material
  5. 5. Air-water syringe tip, HVE, gauze
  6. 6. Disinfectant and labeled lab bag

Safety and care

  1. Mixing tips are single-use.
  2. Disinfect before sending to the lab.

Related

Sources: Premier Dental. Alfa Triple Tray instructions for use, Spear Education. 7 Steps to Using Retraction Cord When Making Impressions