State Exam (DASLE) exam with
complete solutions
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
complete solutions
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
