Which model is poured/trimmed after the rubber base impression (or alginate if preliminary impression was sufficient) has been taken?

Which model is poured/trimmed after the rubber base impression (or alginate if preliminary impression was sufficient) has been taken?

• A. Model
• B. Impression
• C. Custom Tray
• D. Final Model

Answer: (D)

After taking the impression, the next step is to pour it with dental stone to create a positive cast. That poured cast is initially just called a model, but once it’s trimmed to remove excess material and to establish a clean, stable base, it becomes the final model. This final model is the finished, ready-to-use replica used for fabrication and evaluation in the lab. The impression is the negative replica, the custom tray is the tool used to take the impression, and the model becomes final only after trimming.

After taking the impression, the next step is to pour it with dental stone to create a positive cast. That poured cast is initially just called a model, but once it’s trimmed to remove excess material and to establish a clean, stable base, it becomes the final model. This final model is the finished, ready-to-use replica used for fabrication and evaluation in the lab. The impression is the negative replica, the custom tray is the tool used to take the impression, and the model becomes final only after trimming.