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
5. Avoid excessive trimming
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.