11/16/2023 0 Comments Closed tray impression copingMany older patients have pontics in contralateral quadrants, large embrasures, etc. I don't use a putty, but medium viscosity tray material or heavy body depending on arch configuration, bridge undercuts, length of remaining teeth, pontics, embrasures, etc. This is a very old technique dating back to the 70's and 80's. It is quick and easy.įor incredible accuracy I wrap floss in a figure 8 fashion and lute all the impression copings with Duralay. I simply drill where the putty has told me to drill. This way I know exactly where to drill the holes for the impression copings. Then I mix a putty, place it in the tray, pump it up and down on the impression posts and immediately remove it prior to setting. I absolutely agree that an open tray technique is far superior when multiple implants are being impressioned. Keep the screws organized if you have different sizes.Īll the above comments are great. Once the impression sets, pick the material out of the hex holes and use a short hex drive to back out all the screws. One or two fixtures, the transfer should be fine, but when you talk about eight fixtures, I feel better with the open tray for the following reasons:ġ- I have less chance of introducing inaccuracies by trying to fit the impression coping back in the impressionĢ- I feel better knowing that I won't lock the impression in the mouth in cases with divergent implantsģ- I know there is less chance of distortion of the impression because the impression coping stays in itĪ good tip is to try the tray in the mouth and make sure you can feel the top of the impression posts with your finger, then when you take the impression, wipe your finger again to expose the top of the impression posts before the material sets. You are correct in going to an open tray (or pick-up)impression technique versus the closed tray (or transfer) technique.
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