Direct impression
Modify a stock tray by creating a hole cut in to the tray in the area where the impression coping will be located. Use appropriate platform diameter, direct impression coping (also called transfer coping) from the same manufacturer as the implant. Utilizing the correct impression coping will give the technician important information about the manufacturer and platform diameter to avoid any confusion on what parts to use.
Open tray
Sometimes the implant will be quite far below the tissue and once the healing abutment is removed the tissue will start to collapse over the implant, making the seating of the transfer difficult. Therefore, working efficiently and expediently is essential.
Verified seat
Once the impression coping is seated and the retaining screw is hand tightened take an x-ray to verify accurate placement of the transfer on to the implant. The x-ray needs to be taken perpendicular to the long axis of the implant to ensure a clear picture of the mating surface of the implant and impression coping.
Incorrect seat
Full arch impression of the opposing and a bite record also are needed. Send impressions, bite, transfer coping and a copy of the x-ray to the laboratory. Sending a copy of the x-ray to the lab serves as proof the impression coping was seated accurately at the time of impression taking. This might come in handy later on, if there are problems with the restoration supplied by the laboratory and a decision needs to be made where the mistake occurred.