Boxing and Pouring Final Impression for edentulous jaw

| April 21, 2012 | 0 Comments

Boxing and Pouring Final Impression for edentulous jaw

Boxing of a final impression should be:
1. Quick and easy with consistent results
2. Provide support and preserves flange contours
3. Compatible with cast material and impression material
4. Inexpensive
5. Avoid excessive trimming

 

The right side at the arrow is prepared correctly, with a 6 mm land area which is horizontal, with approximately 2-3mm of the periphery expose. The left side at the arrow is prepared incorrectly so that stone will lock around the rigid tray. Don’t cut the alginate back too deeply below the peripheral role, or the impression will be difficult to remove.
 

At the posterior border of the impression, make sure the denture is cut back to the vibrating line (recheck before cutting). The edge of the posterior border should show about 1 mm above the alginate in this area to ensure that the posterior border can be detected on the master cast. If the impression is perfectly continuous with the alginate, it will not be possible to discern the posterior border of the denture.

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Category: Prosthodontics, WIKI

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