Which term is the material used to make a stone or plastic replica of an arch?

Which term is the material used to make a stone or plastic replica of an arch?

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

Answer: (C)

The term you’re looking for is the impression material—the stuff used to capture an exact negative imprint of the dental arch. This negative impression is then used to pour a stone (or other casting material) to create the positive replica, which many technicians refer to as the model or cast. So the material that records the arch’s anatomy is the impression; the resulting model is the stone or plastic replica. The other options describe the replica itself (model) or things related to taking impressions (custom tray) or a specific type of impression, not the material used to capture the arch.

The term you’re looking for is the impression material—the stuff used to capture an exact negative imprint of the dental arch. This negative impression is then used to pour a stone (or other casting material) to create the positive replica, which many technicians refer to as the model or cast. So the material that records the arch’s anatomy is the impression; the resulting model is the stone or plastic replica. The other options describe the replica itself (model) or things related to taking impressions (custom tray) or a specific type of impression, not the material used to capture the arch.