Tissue Conditioners Flashcards

1
Q

powdered polymer

A

polyethyl methacrylate or isobutyl methacrylate

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2
Q

liquid

A

an ester (butyl phthalate or butyl glycolate) in an alcohol solvent

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3
Q

tissue conditioners

A

lining the intaglio surface of a. denture with a conditioners improves retention and stability and relieves pressures. this allows the abused tissue to recover

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4
Q

Polymer and monomer are mixed to make a
gel, then placed in denture -→ insert for

A

5
minutes.

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5
Q

conditioners (2)

A

Self-curing & slowly polymerizing
 Versatile and easy to use

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6
Q

used to treat (3)

A

 Chronic denture soreness
 Traumatized oral mucosa
 Remodeling ridges

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7
Q

allow pt to continue

A

wearing dentures while allowing abused tissue to heal

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8
Q

the sponginess of the material absorbs loads to the underlying residual ridge and allows the tissues to heal during

A

function

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9
Q

loss of resilliency occurs as the

A

plasticizer leaches out -resin becomes stuff

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10
Q

material should be renewed

A

once or twice per week if treating irritated tissue

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11
Q

If not renewed, the resin becomes

A

stiff and
produces the same tissue abuse that it was
placed to treat

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12
Q

tissue conditioner uses (4)

A

 Prevent or treat chronic denture soreness
 Stabilize temporary record bases
 Stabilize immediate dentures during healing
 Final impression material for functional
impressions

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13
Q

resilient liners
 A group of elastomer polymers
 Used in a denture when a protective
resilient
surface is needed on the intaglio surface:

A

sensitive mucosa,
postradiation mucositis,
poorsupporting tissue, etc

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14
Q

resilient liners (4)

A

 Xerostomia patients
 Hypersensitive mucosa
 Bruxers
 Knife-edge ridge / atrophy

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15
Q

Are heat-processed to the denture base as a
“–” procedure

A

reline

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16
Q

Elastic deformation of the liner allows the
material to

A

absorb energy/pressure of
occlusion, decreasing pressure on mucosa

17
Q

resilient liners materials (4)

A

 Silicone elastomers
 Polyurethane elastomers
 Vinyl-acrylic polymers
 Rubber

18
Q

resilient lines
Length of service ranges from

A

6 months to 5
years

19
Q

resilient liners - other uses (7)

A

 Ridge atrophy – mental foramina, sharp
ridges
 Surgery contraindicated (Implants not
possible or implant failure)
 Bruxers
 Restore congenital/acquired defects—can
engage undercuts with “resilient prosthesis”
 Xerostomia – irradiation, medications
 Relief areas – median palatal raphe
 Single mandibular denture

20
Q

resilient liners
in use, the elastic deformation of the resilient material

A

absorbs pressure that would otherwise be transmitted to sensitive tissues

21
Q

metal base dentuers
 An indication:

A

repeated fracture of a
conventional denture. Sometimes seen when
a single denture opposes natural dentition.

22
Q

metal based dentures adv (6)

A

stronger, less likely to fracture
less poris
more accurate
less deform of base during fxn
better thermal conductivity
better tissue tolerance

23
Q

metal base dentures
adv (3)
disadv (1)

A

 Better thermal conductivity
 Better tissue tolerance
 Less deformation of base during function

 A disadvantage!!
difficult to reline

24
Q

cast metal bases (3)

A

Ni-Cr or Co-Cr
 Gold (Type IV)
 Aluminum

25
Q

SKIPPED
tissue changes (4)

A

 Stresses of daily function
 Changes in general health status
 Hereditary factors
 Defects in dentures -→ produce changes in
tissue form

26
Q

a procedure is needed every — after initial insertion

A

4-7 years

27
Q

why reline/base? (4)

A

 Fit of denture base to the foundation is
poor.
 Denture is not stable and/or is non-
retentive.
 Denture base is fractured, discolored, or
underextended.
The purpose is to
produce an intaglio
surface which fits the
mucosa accurately

28
Q

Relining –
 Rebasing – r
 — relationship not altered

A

replacing the intaglio surface of
the prosthesis

eplacing the entire denture
base(intaglio and cameo surfaces)

Occlusal

29
Q

relining

A

Process of adding new resin to the intaglio
surface of a denture

30
Q

All of the existing denture base is replaced by
new resin =

A

Rebase.
 The occlusal relationship of the teeth is not
altered

31
Q

reline when

A

Denture is not retentive, not stable.

32
Q

relining
Existing — should be acceptable
 Occlusion acceptable at centric relation
position →

A

OVD

error,
if present, is slight and is
correctable.

33
Q

reline when (4)

A

existing OVD is acceptaable
apperance of teeth and base acceptable
acceptable occlusion at CR (or error is slight and is correctable)
phonetics accetable

34
Q

when not to reline (4)

A

Teeth grossly malpositioned / worn
 Occlusal plane errors
 Poor esthetics/phonetics
 OVD in error

35
Q

relining errors to avoid (5)

A

Increasing the OVD
 Denture with impression material is not
fully seated in place → increases the OVD
 Allowing the denture to move forward
during reline impression step → alters the
occlusal relationships.
 Allowing maxillary denture to move forward
during impression step
Occlusal relationship errors

36
Q

static impression (5)

A

 Closed Mouth technique
 Patient occludes at OVD
 Functional movements made with tongue
 Removed moments later, not hours later
 Polysulfide, PVS, polyether, etc

37
Q

in children/young adults acromegaly -

A

ridges increasing in size
relines needed often