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DA 140
Chapter 35 Lab materials & techniques
Term | Definition |
---|---|
Articulator | Replicate the movement of the jaw/joints. Used with models to study malocclusion |
Spacer and stopper | Thin liner/divider between maxillary and mandibular arches for custom fit. Can be wax, foil or wax paper |
Undercut | Recessed areas in the model that make it impossible to seat or remove custom tray properly; caused by bubbles in plaster, cavities or shape of arch or dentition |
Final Impression | Silicone impression that is sent to the lab |
Custom tray | Molded and fit specific for one person |
Die | Positive replica of the prepared tooth made from stone/plaster |
Triple tray | |
Dimensional stability | Durability and strength |
Preliminary impression | Done by assistant, poor dimensional quality and stability |
Alginate impressions | Make a negative mold |