![]() Once set, retract cheeks to loosen and roll out.Ask patient to breath thru their nose and till chin down. ![]() Standing behind the patient enter with one corner of tray, seat posterior first then roll anterior.Use fast set alginate or water that is not to cold.Spray the impression with a disinfectant and drain, before pouring with stone or plaster.įor taking upper impressions the operator’s position should be at 9 or 12 o’clock if you are right handed and dental chair should be raised so you are not bending over. Wrap impression in a wet paper towel until you can pour it up.You should have a lip roll and all of the teeth and no bubbles in the impression.To remove tray pull out the cheeks to break seal, protect the opposing teeth, snap it out rolling it out the same as you put it in one side then the other.Roll it in the mouth one side then the other, seat in a even motion pulling lips out around the tray, once seated, ask patient to lift their tongue, hold tray with your fingers until material is set. Take the impression from in front of the patient.Should be the same height as the patients shoulders. It is recommended to wipe alginate on occlusal surfaces before seating tray to help prevent occurrence of trapping bubbles in impression.įor taking lower impressions the operator’s position should be at 8 to 9 o’clock, your elbow.Set time is three minutes from start of mix.Collect alginate from sides of bowl with spatula and place the impression material evenly in the tray. ![]() At this point, the mix should be a smooth, creamy consistency that does not fall off spatula.
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