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P3 > MATERIALS USED IN THE MANAGEMENT OF EDENTULOUS PATIENTS (j) > Flashcards

MATERIALS USED IN THE MANAGEMENT OF EDENTULOUS PATIENTS (j) Flashcards

1
Q

physical attraction of unlike molecules, such as saliva and mucous membrane

A

Adhesion

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2
Q

the physical attraction of like molecules for each other, such as within the saliva layer

A

Cohesion

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3
Q

is the attraction between the molecules of two different substances

A

adhesion

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4
Q

is the attraction between the molecules or atoms of the same substance

A

cohesion

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5
Q

also called a “suction” or “negative pressure”

A

ATMOSPHERIC PRESSURE

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6
Q

may act to resist dislodging forces applied to dentures if the dentures have an effective seal around their borders

A

ATMOSPHERIC PRESSURE

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7
Q

may act as a retentive force for the mandibular denture but as a displacing force for the maxillary denture

A

GRAVITY

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8
Q

T/ F

Upon removal from the mouth, the set impression should show adequate elastic recovery with no permanent
deformation

A

T

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9
Q

means it has high resistance to flowing

A

high viscosity

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10
Q

used as a mucostatic impression because it does not compress and displace tissues during seating of the tray

A

IMPRESSION PLASTER

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11
Q

→ recommended as it is very brittle
→ can undergo virtually no compressive or tensile strength without
fracturing

A

IMPRESSION PLASTER

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12
Q

applications of ZOE impression:

o mainly used for final impressions of edentulous ridges with
minor or no undercuts

o wash impression

A

ZINC OXIDE EUGENOL IMPRESSION PASTE

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13
Q

impression material for edentulous patients

A

Cakes

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14
Q

as border molding material for the custom tray; the material is used before making the final impression

A

Sticks

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15
Q

Type 1

A

Sticks

Cakes

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16
Q

→ used as a tray adaptation material
→ used for making a primary impression of the soft tissues and
then used as a tray to support a thin layer of a second impression material (ex.: ZOE pastes)

A

Type 2

17
Q

can be stretched or compressed slightly and still rebound without significant permanent deformation

A

ELASTIC IMPRESSION MATERIALS

18
Q

agar is considered one of the most accurate impression material because of their low viscosity and great degree of recovery after deformation around undercuts

A

REVERSIBLE HYDROCOLLOID

19
Q

T/ F

REVERSIBLE HYDROCOLLOID is hydrophilic

A

T

20
Q

expulsion of water or other liquid molecules hence, the impression shrinks a little

A

Syneresis

21
Q

dimensional change if stored in water; absorption

A

Imbibition

22
Q

alginates are the most widely used impression material in dentistry

A

IRREVERSIBLE HYDROCOLLOID

23
Q

T/ F

to avoid tears in the impression, a minimum of 3 mm of impression material should be present between the tray and oral tissues

A

T

24
Q

are indicated for making accurate final impressions for edentulous patients when used in custom trays

A

ELASTOMERIC IMPRESSION MATERIALS

25
Q

also known as “mercaptan” or “thiokol”

A

POLYSULFIDE RUBBER IMPRESSION MATERIAL

26
Q

emits a foul odor due to lead dioxide

A

POLYSULFIDE RUBBER IMPRESSION MATERIAL

27
Q

a byproduct of this condensation reaction

A

ethyl alcohol

28
Q

→ supplied as a two-paste or a base paste and low-viscosity liquid catalyst
→ has a large polymerization shrinkage

A

CONDENSATION SILICONE IMPRESSION MATERIAL

29
Q

also known as polyvinyl siloxanes

A

ADDITION SILICONE IMPRESSION MATERIAL

30
Q

in the presence of impurities or moisture, a secondary reaction may occur between the residual hydrides and moisture which
leads to gaseous voids in the gypsum casts

A

ADDITION SILICONE IMPRESSION MATERIAL

31
Q

→ has a high degree of wettability of the oral tissues (hydrophilic)

→ stiffness of the original polyether made the material quite
difficult to remove from the undercuts

A

POLYETHER IMPRESSION MATERIAL

32
Q

VLC visible light-activated dimethacrylate

A
33
Q

the technique in processing heat-activated PMMA

A

DOUGH TECHNIQUE

P3 (7 decks)

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