Before Midterm: Survey Crown

Question 1

Structures that must be captured in impression for RDP:

Answer 1

teeth, residual ridges,

Question 2

Factors to be considered when making an impression

Answer 2

materiall, technique

Question 3

Most common reason for lack of accuracy of impression:

Answer 3

distortion of material

Question 4

Tray for 1’ impression:

Answer 4

stock

Question 5

How to get functional form for RPD:

Answer 5

pour up as master cast, send to lab, framework comes back, another impression of distal extended area,

Question 6

Step for impression making for RPD:

Answer 6

stock tray: diagnostic impression, dx cast, custom tray: secondary impression, master cast prep, corrected impression when indicated in distal extension RPF

Question 7

Pt positioning for alginate impressions:

Answer 7

upright, occlusal plane parallel to the floor

Question 8

Where to stand for mandibular impressions;

Answer 8

to R and infront of pt

Question 9

Where to stand for maxillary impressions:

Answer 9

to R and behind pt

Question 10

4 types of stock impression trays for dentate and partially edentulous arches:

Answer 10

non-perforated or plastic, perforated metal or plastic

Question 11

Clearance needed for maxillary or mandibular trays:

Answer 11

4-5mm facial and lingual

Question 12

How thick should the alginate be?

Answer 12

4-5mm

Question 13

What to tell pt when taking max impression:

Answer 13

relax your jaw

Question 14

How to modify impression trays:

Answer 14

wax or modeling plastic

Question 15

The tray should cover these landmarks in the max arch:

Answer 15

tuberosities, vibrationg line

Question 16

This may need to be extended to get the retromolar pad in the retromylohyoid region:

Answer 16

lingual flange, esp for distal extended RDP

Question 17

Ideal temp for mixing alginate:

Answer 17

70F

Question 18

Have pt do this while mixing alginate:

Answer 18

rinse with water

Question 19

How to impress the anterior vestibule an get all anterior teeth:

Answer 19

retract lip when seating tray and drape lip over the tray

Question 20

TF? Tray should be seated all the way when taking impressions.

Answer 20

F. leave 4-5mm space

Question 21

How long should the tray set?

Answer 21

3m

Question 22

Where to apply light pressure while alginate is setting:

Answer 22

L and R premolar areas

Question 23

Direction to remove the ray:

Answer 23

with the long axis of tooth (to avoid tearing or distortion

Question 24

Adv of making individual trays:

Answer 24

more accurate tray adaptation, even thickness of material, helps w adjustments of tray extension, border molding procedures, and accurate recording of functional vestibular depth

Question 25

The outline of the tray on the cast should be __ shorter in the distal extension area

Answer 25

2mm

Question 26

How many layers of wax on teeth and tissue surfaces to create space for material when making custom trays:

Answer 26

1 over tissue, 2 over teeth

Question 27

These allow for adequate material space in the custom tray:

Answer 27

ant and pos stops

Question 28

Type of material we use for custom trays:

Answer 28

VLC resin

Question 29

Beware of this when making handle for custom tray:

Answer 29

should not interfere w lip

Question 30

Initial cure time for custom tray:

Answer 30

2m

Question 31

Second cure duration for custom tray:

Answer 31

5m

Question 32

How to get border molding more accurate for complete dentures

Answer 32

rim instead of handle

Question 33

What are we doing to the custom tray we when curing it?

Answer 33

polymerizing

Question 34

Paint custom tray w this material after initial 2m cure:

Answer 34

air barrier coating

Question 35

Thickness of custom tray:

Answer 35

2-3mm overall

Question 36

Are modifications easier to make on the stock tray or custom?

Answer 36

custom

Question 37

Areas of custom tray most likely in need of trimming:

Answer 37

DB area and area of lingual and sublingual frenum

Question 38

Adhesive to use for stick compound (modeling plastic?):

Answer 38

none

Question 39

Areas of mandibular tray to border mold:

Answer 39

lingual border, edentulous areas, for major connectors

Question 40

Take note of this when taking secondary impression:

Answer 40

height from lingual vestibule to the gingival margin

Question 41

Material we use for 2’ impressions:

Answer 41

heavy body PVS

Question 42

start borde molding here:

Answer 42

lingual side, maxillary - tuberosity and posterior region

Question 43

Don’t forget to do this in areas that you will be placing PVS or border molding

Answer 43

place adhesive on custom tray first

Question 44

When to block out interproximal area:

Answer 44

if it helps w removal of impression, need for stronger dentate area on the master cast (perio pts), ues soft, sticky peripheral wax

Question 45

When should you block out PRDP framework area before taking secondary impression?

Answer 45

never

Question 46

Materials to block out interproximal areas in clinic:

Answer 46

soft periphery wax or oraseal caulking and putty material

Question 47

TF? Desicate teeth before placing oraseal into interproximal areas.

Answer 47

F. adheres in wet environment

Question 48

PVS sf:

Answer 48

polyvinyl siloxane

Question 49

Where to place light body for secondary impression:

Answer 49

stopped at slide #45