Tissue Conditioners Flashcards
powdered polymer
polyethyl methacrylate or isobutyl methacrylate
liquid
an ester (butyl phthalate or butyl glycolate) in an alcohol solvent
tissue conditioners
lining the intaglio surface of a. denture with a conditioners improves retention and stability and relieves pressures. this allows the abused tissue to recover
Polymer and monomer are mixed to make a
gel, then placed in denture -→ insert for
5
minutes.
conditioners (2)
Self-curing & slowly polymerizing
Versatile and easy to use
used to treat (3)
Chronic denture soreness
Traumatized oral mucosa
Remodeling ridges
allow pt to continue
wearing dentures while allowing abused tissue to heal
the sponginess of the material absorbs loads to the underlying residual ridge and allows the tissues to heal during
function
loss of resilliency occurs as the
plasticizer leaches out -resin becomes stuff
material should be renewed
once or twice per week if treating irritated tissue
If not renewed, the resin becomes
stiff and
produces the same tissue abuse that it was
placed to treat
tissue conditioner uses (4)
Prevent or treat chronic denture soreness
Stabilize temporary record bases
Stabilize immediate dentures during healing
Final impression material for functional
impressions
resilient liners
A group of elastomer polymers
Used in a denture when a protective
resilient
surface is needed on the intaglio surface:
sensitive mucosa,
postradiation mucositis,
poorsupporting tissue, etc
resilient liners (4)
Xerostomia patients
Hypersensitive mucosa
Bruxers
Knife-edge ridge / atrophy
Are heat-processed to the denture base as a
“–” procedure
reline
Elastic deformation of the liner allows the
material to
absorb energy/pressure of
occlusion, decreasing pressure on mucosa
resilient liners materials (4)
Silicone elastomers
Polyurethane elastomers
Vinyl-acrylic polymers
Rubber
resilient lines
Length of service ranges from
6 months to 5
years
resilient liners - other uses (7)
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
resilient liners
in use, the elastic deformation of the resilient material
absorbs pressure that would otherwise be transmitted to sensitive tissues
metal base dentuers
An indication:
repeated fracture of a
conventional denture. Sometimes seen when
a single denture opposes natural dentition.
metal based dentures adv (6)
stronger, less likely to fracture
less poris
more accurate
less deform of base during fxn
better thermal conductivity
better tissue tolerance
metal base dentures
adv (3)
disadv (1)
Better thermal conductivity
Better tissue tolerance
Less deformation of base during function
A disadvantage!!
difficult to reline
cast metal bases (3)
Ni-Cr or Co-Cr
Gold (Type IV)
Aluminum
SKIPPED
tissue changes (4)
Stresses of daily function
Changes in general health status
Hereditary factors
Defects in dentures -→ produce changes in
tissue form
a procedure is needed every — after initial insertion
4-7 years
why reline/base? (4)
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
Relining –
Rebasing – r
— relationship not altered
replacing the intaglio surface of
the prosthesis
eplacing the entire denture
base(intaglio and cameo surfaces)
Occlusal
relining
Process of adding new resin to the intaglio
surface of a denture
All of the existing denture base is replaced by
new resin =
Rebase.
The occlusal relationship of the teeth is not
altered
reline when
Denture is not retentive, not stable.
relining
Existing — should be acceptable
Occlusion acceptable at centric relation
position →
OVD
error,
if present, is slight and is
correctable.
reline when (4)
existing OVD is acceptaable
apperance of teeth and base acceptable
acceptable occlusion at CR (or error is slight and is correctable)
phonetics accetable
when not to reline (4)
Teeth grossly malpositioned / worn
Occlusal plane errors
Poor esthetics/phonetics
OVD in error
relining errors to avoid (5)
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
static impression (5)
Closed Mouth technique
Patient occludes at OVD
Functional movements made with tongue
Removed moments later, not hours later
Polysulfide, PVS, polyether, etc
in children/young adults acromegaly -
ridges increasing in size
relines needed often
