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Question 1

Problem with alginate impression - viscosity.

Answer 1

Because of their high viscosities, these impression materials will often displace the soft tissues ofthe vestibules, resulting in an overextended impression and resulting cast

Question 2

Prior to making the impression, the patient is instructed to

Answer 2

rinse his or her mouth with water to reduce the \iscosit' of the saliva

Question 3

Prior to inserting the impression tray, the patient should be asked to

Answer 3

swallow to elim- inate excess saliva

Question 4

Figure 6-8 Note that a “fatty” pad of tissue (A) is often

Answer 4

present in the distobuccal area of the mandibular arch and may fold over the retromolar pad (B) and become trapped in an impression.This fold can be minimized by lifting this tissue upward and away from the retromolar pad while seating the impression.

Question 5

An irreversible hydrocolloid impression should be poured in dental .stone within

Answer 5

10 minutes

Question 6

Retention nodules for a cast

Answer 6

stone “mountains” on the bottom of the cast that are then used to prop up the initial die in another blob of wet stone so as to create a good land area.

Question 7

Wlicn properly shaped, the cast sbould also exhibit land areas around the vestibules and a base of approx- imately

Answer 7

12-13 mm (1/2 inch) in tliickness

Question 8

The land area shotild be approximately

Answer 8

2-3 mm (1/8 inch) wide on the buccal and labial

Question 9

land area should be about

Answer 9

5-6 mm (1/4 inch) wide in the posterior

Question 10

For most patients, the labial and lingual flange lengths will be of

Answer 10

equal length unless the patient has had a surgical extension of the vestibular notch or severe bone loss.

Question 11

When border molding before you trim

Answer 11

chill in ice water **only when using wax/heated material

Question 12

VPS does not have the viscosity or rigidity of modeling compound and therefore cannot be used to

Answer 12

correct borders that are underextended by more than 4-5 mm.

Question 13

Also if not supported by the impression tray, VPS cannot be depended on to form

Answer 13

tray fianges 2-3 mm in thickness

Question 14

The buccal shelf areas are initially border molded and must be completed

Answer 14

individ- ually

Question 15

The minimum thickness of a master cast should be

Answer 15

12-15 mm in the thinnest area.

Question 16

.The land areas should be trimmed so that the vestibules are no more than

Answer 16

3 mm In depth

Question 17

Following the block out of the master cast, the cast is

Answer 17

soaked in room-temperature water for five tninutes in order to expel air from within the stone, which will help mini- mize the formation of bubble-like deiccts in the completed record base.

Question 18

Tbe soaking of the cast must be completed after the cast has been blocked out with wax because

Answer 18

the wax will not stick to a wet surface.

Question 19

Max record base; plane of occlusion is

Answer 19

parallel with the base of the cast

Question 20

max record base: anterior portion of the occlusion rim is at approximately a

Answer 20

15° angle to offer lip support

Question 21

support.The poste- rior ofthe maxillary occlusion rim should slope occlusally at approximately a

Answer 21

45 degree angle

Question 22

Blocking out can

Answer 22

lead to more lip support than is necessary.

Question 23

In the posterior, wax should be added or removed to achieve a bilateral

Answer 23

buccal corridor. This space is created by sloping the maxillaiA occltision rim inward in the posterior area

Question 24

For photos use interpupillary distance ratios relative to teeth to

Answer 24

get size for denture teeth relative to current interpupillary distance.

Question 25

Posterior denture teeth are not set on the slope leading from the residual ridge to the retromolar pad because of its tendency to act as an

Answer 25

inclined plane when the patient chews food - irritant.

Question 26

Generally the teeth are arranged in the following order:

Answer 26

(1) maxillary anterior teeth—following the maxillary occlusion rim, (2) mandibular anterior teeth—using the occlusion rims and maxillary teeth as guides, (3) mandibular posterior teeth—using the anterior teeth, retromolar pads, and residual ridges as guides and (4) maxillar)' posterior teeth—using the mandibular posterior teeth as guides.

Question 27

The position of the incisai edge of a maxillary anterior tooth generally provides for

Answer 27

phonetics and esthetics, whereas the cervical portion,or necks, of the teeth and the fullness of the denture base determine lip support.

Question 28

Christensen's phenomena, lhe space that occurs between opposing occlusal surfaces during excursive movements, is

Answer 28

not acceptable for complete denture patients

Question 29

For improved masticatory function, it is generally better to eliminate the

Answer 29

first premolar rather than the second molar

Question 30

the mandibular posterior teeth are arranged on a

Answer 30

flat occlusal plane with the long axes of the posterior teeth arranged perpendicular to the plane of occlusion for a nonbalanced occlusion

Question 31

for a balanced tooth arrangement, a

Answer 31

curved template is used

Question 32

The labial frenulum area is often

Answer 32

prominent and easily displaced. Care must be taken when making an impression of this structure.

Question 33

Wet a cast before trimming to prevent

Answer 33

slurry material from sticking.

Question 34

The retromylohyoid areas receive minimal

Answer 34

wax relief (C) in order to have good adaptation of this area

Question 35

A second guide that can be used to estimate the canine-to-canine measurement Is to measure between the

Answer 35

centers of the left and right hamular notches (A) and add 10 mm.