16 Questions
What can cause an irregularly shaped void in an alginate impression?
Moisture or debris on tissue
Which rubber impression material has the longest setting time?
Polysulfide rubber
What can lead to the formation of a rough or chalky stone cast?
All of the above
Which factor does NOT contribute to tearing in an alginate impression?
Prolonged mixing
What causes a flat lingual area in an acceptable cast?
A land area of 2 to 3 mm
How should a patient be prepared for impression making?
Informing about the procedure and mouth preparation
What is the recommended patient position for an upper arch impression?
Patient seated in an upright position
What is the dentist's position for taking a lower arch impression?
8 o'clock position, instructing patient to bring tongue up and forward
What should be done immediately after taking the impression?
Rinsing the impression, disinfecting, and drying with air stream
What are the qualities of a good impression?
Smooth surface and well-rounded borders
How should a perforated rim lock tray be used?
Applying tray adhesive to secure it in place
What are the properties of irreversible hydrocolloid (alginate) as mentioned in the text?
Accurate, easy to manipulate, does not require custom tray
What is the composition of alginate as stated in the text?
Potassium alginate 15%, calcium sulfate 16%, zinc oxide 4%, potassium titanium fluoride 3%, diatomaceous earth 60%, sodium phosphate 2%
What is the spatulation time for irreversible hydrocolloid (alginate) mentioned in the text?
45 seconds to 1 minute with a vigorous figure – 8 motion
What does a good diagnostic work up involve as per the text?
Evaluate soft tissue contour and bony contour
What is the gelation time for irreversible hydrocolloid (alginate) as mentioned in the text?
3-4 minutes
Test your knowledge on impression making and diagnostic cast fabrication in dentistry. Questions cover topics like nature of disease process determination, elements of a good diagnostic workup, and components of a fixed partial denture. Evaluate your understanding of irreversible hydrocolloid (alginate) properties.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
