Weeks 11, 12, 13 Flashcards
What are some contraindications to taking an alginate impression?
Upper respiratory problems
Lung problems
Eye problems
What is the mixing time for regular set alginate?
1 minute
What is the setting time for regular set alginate?
3 minutes, 30 seconds
What is the total working time for regular set alginate?
4 minutes, 30 seconds
What do you do immediately after taking alginate impression?
Rinse with water, then birex. Wrap in a moist paper towel and let set form 10 minutes, then place in a plastic bag
Imhibition
Impression takes in water
Syneresis
Water evaporates from the impression
How soon do you want to pour stone into the impression?
ASAP
How long does casting stone take to set?
45 minutes
How wide should a cast be?
20mm from occlusal surface to base
Protrusive movement
The mandible moves forward until the incisors are touching
Lateral excursive movement
Mandible moves laterally until the canine cusp tips are touching
How to manipulate a patient into CR?
Deprogram pt by inserting cotton roll between anteriors for 5 minutes. Then gently manipulate pt’s mandible to open and close tightly to find CR. Place thumbs on pt’s chin and hold them downwards while using fingers to hold the body of the mandible superiorly