Making of diagnostic Casts

| January 18, 2012 | 0 Comments

Making of diagnostic Casts

Pouring a Modelhttp://i2.wp.com/1.bp.blogspot.com/-8-niA1mqNgU/TxaKGKtsXjI/AAAAAAAABVM/357B9LYHiKQ/s320/diagnostic-cast.jpg
1. Weigh powder, measure water
2. Vacuum mix (less time, stronger cast)
3. Use a two pour technique
4. Modulate speed of pouring by tilting back and forth or pressing the tray more firmly onto the vibrator
5. Make sure the model is moist during trimming soak in slurry water, or soak with base of cast in water
6. Casts should be a minimum of 12 mm (.5 inch) in thinnest part
7. Separate the alginate impression from the stone cast after 45 minutes

Trimming
1. Trim the base on the model trimmer parallel to the residual ridges
2. Leave the mucous membrane reflection intact for making a custom tray. Remove extensive areas of the cheek or lip reflection which create undercuts and which will make it difficult to make or remove the custom tray
3. All anatomical surfaces should be included with minimum voids

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Category: Prosthodontics, WIKI

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