Lecture 2

Question 1

what is important to tell the patient went making a denture

Answer 1

Let them know the shortcominges

Question 2

what are the characteristics of an Ideal MAxillary ridge

Answer 2

Abundant keratinized attached tissue
Square arch form
Firm, broad and tall residual ridges
Moderate Palatal vault
Low frena attachments

Question 3

what are the characteritisc of an ideal mandibular ridge

Answer 3

Well-defined retromolar pad
abundant attached keratinized mucosa
Firm, braod and tall residual ridges
Deep retromylohyoid space
Low frena attachments

Question 4

what is the problem with high frena attachments

Answer 4

will pull denture away

Question 5

what can be done if you have poor retentive features in a patient for a denture

Answer 5

Place implants to aid in holding

Question 6

what do you tell paitent to do when selecting an edentulous stock stray

Answer 6

Direct patient to pucker and smile after seating tray and alginate
- then relax while material sets

Question 7

where should a maxillary edentulous stock tray extend

Answer 7

Beyond the pterygomaxillary (hamular) notch and vibrating line onto the soft palate

Question 8

what do you tell the pateient to do when selecting a mandibular edentulous stock tray

Answer 8

Have patient protrude tongue and touch upper lip while material sets

Question 9

what must a mandubular impression tray cover

Answer 9

Retromolar pads

extend to capture retromylohyoid fossa

Question 10

how should a well-made preliminary impression lok

Answer 10

must have proper border extensions and all relevent anatomy captured

Question 11

Diagnostic cast requirements

Answer 11

4-5mm land area
2-3mm deth of peripheral roll
15mm thickness

Question 12

why should a diagnositic cast be a certain thickness

Answer 12

To avoid breaking

Question 13

what is a custom impression tray

Answer 13

An individualized tray specific to eachpatient used for final impression purposes

Question 14

what is the purpose of a custom tray

Answer 14

• Minimize impression material distortion (uniform thickness= accuracy
• Prevent tissue distortion (less viscous material = more accurately adapted tray)
• allow for accuracy by molding the borders resulting in better retention

Question 15

how should a custom impression tray be addapted

Answer 15

to the contours of the preliminary cast with the borders approximating the outline of the complete denture

Question 16

what is the goal of border molding

Answer 16

Allows for formation of the peripheral seal

Question 17

what does a custom impression tray need to capture

Answer 17

Borders and movements

Question 18

how far should a Custom tray go into the vestibule

Answer 18

2-3 mm short of the dept of the vestibule

Question 19

goal of wax thickness for a custom tray

Answer 19

minimal wax thickness

Question 20

how thick should a custom tray be

Answer 20

2-3mm tray thickness

Question 21

how should the handle be shapped

Answer 21

45 degree handle

- not impinge on the vestible or distort the lipd

Question 22

presence of finger rests on custom impression trays

Answer 22

on the 1st molar and 2nd premolar as to not distort the vestibule when border molding and making the mandibular final impression

Question 23

how many layers of wax should be used on edentuous patients

Answer 23

1 layer just short of the vestible

Question 24

why leave tray 2-3mm above the vestible

Answer 24

to allow for movements

Question 25

what is the purpose of the wax spacer

Answer 25

Provide room for the impression material and ensure a consistently repeatable positioning during tray placement

Question 26

what is the problem with a too large handle

Answer 26

Can hurt border molding

Question 27

what is the other way of providing tray relief

Answer 27

Placing stops in the custom tray maxilla: posterior alveolar ridge Mandible: buccal shelves and posterior alveolar ridge

Question 28

how many layers of triad tray material should you use

Answer 28

1 layer

Question 29

size of the handle

Answer 29

9mm height 10mm wide - a small roll of material over the incisive papila region

Question 30

why place stops on mandibular trays

Answer 30

hold the tray inplace when border molding

Question 31

should the wax spacer be melted

Answer 31

No

Question 32

what is the advantage of using a wax spacer/tissue stop

Answer 32

- creates tissue relief for impression material - center and stabilize the tray on an edentulous ridge - clinician has predictable positing on tray reinsertion to prevent over seating during border molding

Question 33

should wax come all the way to edge of the custom tray

Answer 33

no, 2mm away from the edge of the custom tray

Question 34

why shouldn't wax come all the way to the edge of the custom tray

Answer 34

allow for border molding amterial to overlap the edge o the tray and form a U shaped joint -holds the impression material in tray

Question 35

how should a custom impression tray look

Answer 35

No shap edges Tray is stable on preliminary cast Flat edges of tray Uniform tray and wax spacer thickness

Question 36

should a tray touch the depth of the vestible

Answer 36

No

Question 37

what should the first border molding account for

Answer 37

The movements of the mouth