MN LDA DASLE EXAM 2024-2025 NEWEST!!! COMPLETE
ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS
100% CORRECT ANSWERS ) ALREADY GRADED A+.
Why and where is it necessary to add wax (wax trimming) to an
alginate tray?
Protect tissue from injury and provide pt. comfort
Extend the length go the try
Add to palate (Pt. with high palatal vault)
Extends borders to aid obtaining bu muscle attachment
What type of wax is used for wax trimming?
Utility Wax
Brainpower
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What is the correct operator position when taking a maxillary
impression? Mandibular?
Stand at 11:00-12:00 (right hand operator) and 12:00-1:00 (Left hand
operator)
Stand at 7:30-8:00 (right hand operator) 4:30-5:00 (left hand operator)
Why is the patient instructed to lift and extrude their tongue when
taking a mandibular impression?
Ensure the lingual aspect of the alveolar process (lingual flange) is
defined
What type of tray/trays are used during an alginate impression and
why?
,Rimlock and/or Perforated
Locks the alginate material into the tray
How is the setting time of alginate lengthened? Shortened?
By using cold water (never change the material ratios)
By using warmer water
Why is mouthwash used in an alginate impression?
1. Remove food debris
2. Help prevent air bubbles
3. Cuts the viscosity of the saliva
4. Helps prevent gagging on the maxillary impression
How many increments of powder are used in a mandibular impression
and how do you load the tray?
Two scoops
With two increment on the lingual of the tray
How many increments of powder are used in a maxillary impression
and how do you load the tray?
Three scoops
With one mass on the posterior of the tray (and then bring most to the
anterior)
What is imbibition?
Uptake of water in an alginate impression
What is syneresis?
Loss of water in an alginate impression
How is an alginate tray seated?
Posterior to anterior
Which alginate impression is taken first and why?
, The mandibular because it is easier (less gagging than the maxillary)
How should an alginate impression be stored if it cannot be poured
up immediately?
Wrapped in slightly moist paper towel, placed in a bag.
What is muscle trimming called on an edentulous patient?
Border molding
How should an impression be removed from the mouth?
With a snap
What is the purpose of taking a bite registration/interocclusal record?
Record the alignment of the teeth
Relate the Mx and Mn cast correctly
Placed between the casts during trimming and storage
List materials that can be used to obtain bite registration?
Base Plate Wax
U-Shaped Wax (Bite Wafer)
Polysiloxanne Paste (Gun dispensed)
ZOE Paste
List the ingredient of alginate
Potassium Alginate-seaweed
Calcium Sulfate-forms gel
Trisodium Phosphate-slows reactions
Zinc Oxide
Potassium Titanium Fluoride
Know the structure found in either or both a Mx and Mn impression
Lingual frenum (Both)
Rague, tuberosity (mx)
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