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RPD > Miscellaneous > Flashcards

Miscellaneous Flashcards

1
Q

PRE-PROSTHETIC SURGERY
surgical removal of the following should be evaluated before the fabrication of the new RPD: (4)

A

max and maand tori
extoses
sharp prominent mylohyoid ridges
epulis fissuratum

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2
Q

DENTURE STOMATITIS

A

localized or generalized chronic inflam of the denture bearing mucosa

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3
Q

DENTURE STOMATITIS
clinically

A

there is redness and a burning sensation w or w/o discomfort

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4
Q

DENTURE STOMATITIS
most likely causes

A

trauma
secondary fungal inf

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5
Q

DENTURE STOMATITIS
tx (5)

A

improved oral hygiene
tissue rest
antigunfal therapy (nystatin)
resilient tissue conditioners
new, well fitting dentrues

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6
Q

ACUTE ATROPHIC CANDIDIASIS
presents as (2)

A

red patch of atrophic
erythmeatous red and painful mucosa

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7
Q

ACUTE ATROPHIC CANDIDIASIS
antibiotic sore mouth, COMMON FORM of atrophic candidiasis should be suspected on a pt that develops symptoms of
(3)

A

oral burning
bad taste
sore throat during or after therapy w broad spectum antibiotics

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8
Q

ACUTE ATROPHIC CANDIDIASIS
pts with — may also develop

A

chronic iron def anemia`

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9
Q

ACUTE ATROPHIC CANDIDIASIS includes

A

denture stomatitis

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10
Q

PAPILLARY HYPERPLASIA
found in

A

palatal vault

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11
Q

PAPILLARY HYPERPLASIA
causes (4)

A

local irritation
poor fitting dentures
poor oral hygiene
leaving dentures in 24 hr/day

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12
Q

PAPILLARY HYPERPLASIA
tx (5)

A

educate pt in oral hygeine
advise pt to leave denture out at nigh
soak dentures for 30 min /day 1% sodium hypocholorite and rinse
use tissue conditioner
brush irritated area lightly w soft brush

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13
Q

EPULIS FISSURATUM

A

chronically ill fitting denture may cause inflam fibrous hyperplasia adjacent to its border. it is a reactive growth in relation to an overextended or ill fitting denture flange. these cleft like lesions are known as EPULIS FISSURATUM

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14
Q

EPULIS FISSURATUM
causes (2)

A

long term neglect or settling subsequent to residual ridge resorption
traumatic occlusion of natural teeth opposing an artificial denture

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15
Q

EPULIS FISSURATUM
tx

A

surgical removal of the hyperplastic tissue

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16
Q

HYPERPLASTIC TISSUE

A

surgically removed before construction of RPD

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17
Q

HYPERPLASTIC TISSUE
tx (4)

A

tissue rest
soft reline of existing dentures
change in denture habits
surgical removal of tissue

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18
Q

HYPERPLASTIC TISSUE
the best impression tech for patient w loose HYPERPLASTIC TISSUE is to

A

register the tissue in its passive position

there must be intimate contact of the impression material w the tissue in its passive position

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19
Q

HYPERPLASTIC TISSUE
the most important reason for tx before construction of a complete or RPD is to provide a

A

firm, stable base for the denture

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20
Q

KELLY’S COMBINATION SYNDROME

A

specific pattern of bone resorption in the anterior portion of edentulous max

generally observed when a mand partial denture is opposed by a max complete denture

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21
Q

KELLY’S COMBINATION SYNDROME
in most instances, the prosthesis lose some degree of — as a result of alveollar resorption

A

support

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22
Q

KELLY’S COMBINATION SYNDROME
as this resorption occurs beneath the mand extension bassed,

A

support for the psoterior prosthetic teeth is diminished

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23
Q

KELLY’S COMBINATION SYNDROME
occlusal forces are concentrated within the anterior sextants. increased forces in anterior max may result in resorption w accompanying

A

DOWNWARD GROWTH OF THE TUBEROSITIES AND TIPPING OF
THE OCCLUSAL PLANE

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24
Q

KELLY’S COMBINATION SYNDROME
* CONTINUOUS RELINE OR PLACEMENT OF IMPLANTS in mand posterior locaitons may combat the effects of combo syndrome by

A

stabilzing the mand post occlusal surfaces

this results in more stable occlusal plane and a more equitable distribution of forces to the more equitable distribution of forces to the opposing max denture . equitable dist of forces is maintained and the likelihood of conbo syndrome is minimized

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25
Q

TISSUE CONDITIONER

A

soft materials applied to the intaglio to allow a more equitable distribution of forces throughout the dental arch

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26
Q

TISSUE CONDITIONER
they are

A

non irritating
non toxic

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27
Q

TISSUE CONDITIONER
used to tx

A

unhealthy or abused oral tissues

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28
Q

TISSUE CONDITIONER

soft and elastic, does not undergo

A

substantial perm deformation

29
Q

TISSUE CONDITIONER

softness lasts approx — after which the material hardens and ccan itself become an irritant

A

1 week

30
Q

TISSUE CONDITIONER
to be effective in tx abused oral tissues

CONDITIONER MUST BE CHANGED every

A

3-5 days

31
Q

TISSUE CONDITIONER
composed of powder and liquid

A

powder is an acrylic polymer, usually ethyl metacrylate and the liquid is usually a mix of ethyl alc and aromatic ester

32
Q

TISSUE CONDITIONER

these two combine to form a gel that remians pliable for several days
this mechanism of action is a

A

combo of improved force distributed and a short term cushioning effect

33
Q

TISSUE CONDITIONER
intaglio is checked with

A

pip

34
Q

TISSUE CONDITIONER
occulsion is checked and refined following

A

normal procedures

35
Q

TISSUE CONDITIONER
then

A

tissue conditioner is applied

36
Q

TISSUE CONDITIONER
cameo surface of the prothesis is

A

painted with separator

37
Q

TISSUE CONDITIONER
after the tissue conditioner is mixed according to mand recs, it is

A

flowed into the intaglio or the denture

38
Q

TISSUE CONDITIONER
tissue conditioner is distributed evenly using a

A

small spatula

39
Q

TISSUE CONDITIONER

A

tx denture is seated in the mouth under light pressure
the pressure is maintained as the material dlows border tissues should be manpulated to border mold the conditioner
for mand RPD, the tongue should be brought forward and forcibly placed into eat cheek to define the lingual esxtension accurately

40
Q

TISSUE CONDITIONER
if the posterior artificial teeth are present, the pt must

A

close the teeth tg while the conditioner is still capable of flowing in order to align the art teeth properly w the opposing occlusion

41
Q

TISSUE CONDITIONER
once the denture has been seated and aligned, the pt should sit quiletly for — until the gel stage of the cond has been reached

A

4-5 min

42
Q

TISSUE CONDITIONER
at this time the denture should be

A

removed from the mouth and examined

43
Q

TISSUE CONDITIONER
excess material removed usuing a

A

sharp blade

44
Q

TISSUE CONDITIONER
areas of contact are removed using

A

lab burs

45
Q

TISSUE CONDITIONER
tissue conditioner should not be allowed to dry. for those periods of time when the denture is not in the mouth, must be

A

submerged in water or cleansing solution

46
Q

WROUGHT WIRE
(2)

A

febricated by drawing the metal from which it is made into a wire
it is important that a wrought wire slasps have an elongation % of no more than 6%. microstructure changed that could compromise the physical prep such as fracture

47
Q

WROUGHT WIRE
a cast metal is any materal that is

A

melted and cast into a mold

48
Q

when the casting is cold worked in some manner, provide therequired article or appliance it is called a

A

wrought metal

49
Q

the mechanism properties of 11 are superior to those of the cast structure

A
50
Q

WROUGHT WIRE
–% greater strength, hardness and tensile strength

A

25

51
Q

WW has greater (2) than the cast clasps and are tougher and more ductile than cast clasps

A

flexibility
adjusutability

52
Q

WROUGHT WIRE
success depends on

A

physical properties and the changes that may occur during fabrication

53
Q

WROUGHT WIRE
lab procedures can compromise the desirable physical prop due to

A

IMPROPER
HEATING AND COOLING

54
Q

WROUGHT WIRE

A

too much heat
recrystallization or grain growth

55
Q

framework material
* CHROMIUM-COBALT ALLOYS
(4)

A

low density
high modulous
low material cost
resistance to tarnish

56
Q

CrCo are more — in comparaison to gold or palladium. this stiffness can be overcom by including WWretentive elements in the framework

A
57
Q

COMPOSITION OF CHROMIUM
ALLOYS FOR RPDS

A

chromium
cobalt
nickel
carbon, tin indium

58
Q

chromium

A

ensures that the alloy will resist tarnish and corrosion

59
Q

cobalt:

A

contributes strength, rigidness and hardness

60
Q

nickel

A

increases duclitlity

61
Q

minor constituents

A

carbon has a pronouned side effect on the strength, hardness and dictibiliy, time indium and other readily oxidized minor comonents of the alloy fx to improve bonding

62
Q

gold alloys are — as flex as the CrCo alloys

A

twice

63
Q

CHROMIUM-COBALT ALLOYS
adv (3)

A

high modulous for elasticity, lower flex
low material cost
low density

64
Q

CHROMIUM-COBALT ALLOYS
causes for failure (4)

A

cold working
shrinkage porosity
low % elongation
excessive carbon in the alloy

65
Q

cold working

A

reduced the % of elongation that causes a decrease in hardness

66
Q

shrinkage porosity

A

alloys shrink approx 2.3 % and the result is porosity

67
Q

low % elongation

A

directly related to greated brittleness

68
Q

excessive carbon in the alloy

A

reacts with the other constituents to form carbides

RPD (22 decks)

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