DASLE STATE EXAM 2024-2025 NEWEST!!! ACTUAL COMPLETE
EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS )
ALREADY GRADED A+.
Why and where is it necessary to add wax (wax trimming) to an
alginate tray? - ANSWER -- Protects tissue from injury and provides
pt. comfort
- Extends the length of tray
- Add to palate (Pt. with high palate)
- Extends to borders to aid in obtaining muscle attachments
What type of wax is used for wax trimming? - ANSWER -Utility wax
What is the correct operator position when taking maxillary
impressions? Mandibular? - ANSWER -Maxillary: 11-12 (right handed)
12-1 (left handed)
Mandibular: 7:30-8 (right handed) 4:30-5 (left handed)
Why is the patient instructed to lift and extrude their tongue when
taking a mandibular impression? - ANSWER -Ensures the lingual
aspect of the alveolar process (lingual flange) is defined
What types of trays are used during an alginate impression and why?
- ANSWER -- Rimlock/Perforated
-Locks the alginate material into the tray
How is the setting time of alginate lengthened? Shortened? -
,ANSWER -Lengthened: by using cold water
Shortened: by using warmer water
Why is mouthwash used in an alginate impression? - ANSWER --
Removes food debris
- Helps prevent air bubbles
- Cuts the viscosity of saliva
- 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? - ANSWER -- 2 scoops
- Load the tray lingually in two increments
How many increments of powder are used in a maxillary impression
and how do you load the tray? - ANSWER -- 3 scoops
- Load the tray in one mass starting on the posterior bringing to the
anterior
What is imbibition? - ANSWER -Uptake of water in an alginate
impression
What is syneresis? - ANSWER -Loss of water in an alginate
impression
How is an alginate tray seated? - ANSWER -Posterior to anterior
,Which alginate impression is taken first? Why? - ANSWER -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? - ANSWER -Wrapped in a slightly moist paper towel
What is muscle trimming called on an edentulous patient? - ANSWER
-Border molding
How should an impression be removed from the mouth? - ANSWER -
With a snap
What is the purpose of taking a bite registration/interocclusal record?
- ANSWER -- Record the alignment of the teeth
- Relate the MX. and MD. casts correctly
- Placed between the casts during trimming and storage
List the materials that can be used to obtain bite registration? -
ANSWER -- Base plate wax
- U-shaped wax (bite wafer)
- Polysiloxanne paste (gun dispensed)
- ZOE paste
List the ingredients of alginate - ANSWER -- Potassium alginate
(seaweed)
- Calcium sulfate (forms of gel)
- Trisodium phosphate (slows reaction)
- Zinc oxide
, - Potassium Titanium Fluoride
Structures of a Maxillary impression - ANSWER -- Hard palate
- Tuberosities
Structures of a Mandibular impression - ANSWER -- Retromolar pad
- Lingual frenum
- Tongue space
- Mylohyoid ridge
Describe the motion/pressure when performing a mechanical polish
(coronal polish) - ANSWER -- Short, overlapping, intermittent, wiping
and lifting motion (no scrubbing) - work from gingival to
occlusal/incisal
- Cup flares
- Fulcrum on same arch with ring finger
- Cup should be moving before touching tooth
- Apply slow to moderate pressure
- Turn handpiece to adapt interproximally
What should be done first if a patient has esthetic or porcelain
restorations? - ANSWER -Esthetic or porcelain restorations should be
polished first
What is the purpose of selective polishing? - ANSWER -To polish only
the teeth with stains
- less unnecessary removal of tooth enamel
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