click below
click below
Normal Size Small Size show me how
DA 160
Alginates, Chapter 35
| Question | Answer |
|---|---|
| Potassium Alginate | Main ingredient, comes from sea kelp (seaweed) and acts as a thickener |
| Setting time | Time required for chemical action to be completed and when impression to be removed from patients mouth. |
| Working time | Time allowed for mixing, loading trays and positioning in the mouth |
| Undercuts | Recessed areas that are wider on the bottom than on top |
| Irreversible Hydrocolloid | Material that is not able to return to the sol state after becoming a gel. Like cake mix, once cake is cooked it can't go back to the powder mix |
| Single pour | One mix for both portions |
| Double pour | Pouring anatomic portion first then the art portion for base. |
| Anatomic portion | Natural anatomy portion of negative impression. (teeth, gingival ect) |
| Art portion | Base portion of cast; 1/3 overall ht) |
| Box method | Creating a secure base/box with wax and pouring plaster into it; 1 mix for both portions |