In getting an accurate impression result, there are some factors to be concerned about such as the type of impression tray, the impression technique and the
impression material. [1-9] Final impression for FPG usually taken out using elastomer material.
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Impression material, Irreversible hydrocolloid, Impression faults.
When impressions are usually made the patient is in the reclined or semi-supine position and this increases the likelihood of gagging because the intraoral space is reduced as the tongue drops back and the
impression material flows towards the back of the mouth.
The type of
impression material and impression technique used will affect the internal fit of a prosthetic restoration.
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Polyvinyl siloxane putty
impression material was mixed and loaded impression tray was seated in child's mouth until the
impression material adequately covered the upper gum pads completely.
The latter is more reliable because of the accuracy with which we can achieve variable thickness in the
impression material (because of variable thickness of wax spacer) and thereby achieve variable compression of tissues at different areas (selective pressure at selected areas).
Remove
impression material and if necessary a portion of the tray to expose the stone from the first pour, and create a V-shaped notch and flat land area in the stone to index the opposing cast.
Then instead of a messy tray of
impression material, your tooth is dusted with a reflective powder and we will take pictures of the tooth with a special camera which uses light reflected from the powder to create a 3D image of the prepared tooth.
Although most patients who are fitted for a hearing aid experience no adverse outcomes, ear mold
impression material does occasionally impact the ear.