Tissue Conditioners Flashcards
What are some examples of types of tissue conditioners?
- powdered polymer (polyethyl methacrylate or isobutly methacrylate)
- liquid (an ester such as butyl phthalate or butyl gylcolate in an alcohol solvent)
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What is pathognomonic?
(of a sign or symptom) specifically characteristic or indicative of a particular disease or condition
What is the purpose of tissue conditioners?
- improves retention and stability and relieves pressure
- allows the abused tissue to recover
How do you place the tissue conditioner?
- polymer and monomer are mixed to make a gel and then placed in denture
- insert for 5 minutes
- self-curing and slowly polymerizing
- trim the excess
What do tissue conditioners treat?
- chronic denture soreness
- traumatized oral mucosa
- remodeling ridges
What do tissue conditioners allow for?
- allow patient to continue wearing dentures while allowing abused tissue to heal
- sponginess of material absorbs loads and allows tissue to heal
What can happen if tissue conditioners are not renewed?
resin becomes stiff and produces the same tissue abuse that it was placed to treat
How often should tissue conditioners be renewed?
once or twice per week
What are the uses of tissue conditioners?
Prevent or treat chronic denture soreness
Stabilize temporary record bases
Stabilize immediate dentures during healing
Final impression material for functional impressions
What is a resilient liner?
A group of elastomer polymers
Used in a denture when a protective resilient surface is needed on the intaglio surface: sensitive mucosa, postradiation mucositis, poor supporting tissue, etc.
When should you use resilient liner?
Xerostomia patients
Hypersensitive mucosa
Bruxers
Knife-edge ridge / atrophy
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How does tissue change do to dentures?
Stresses of daily function
Changes in general health status
Hereditary factors
Defects in dentures -→ produce changes in tissue form
How often do you need to reline complete dentures?
every 4-7 years after initial insertion
Why do we reline/rebase?
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.
What is the purpose of the reline procedure?
produce an intaglio surface which fits the mucosa accurately without affecting the occlusion or the OVD
What is relining?
replacing the intaglio surface of the prosthesis
What is rebasing?
replacing the entire denture base (intaglio and cameo surface)
All of the existing denture base is replaced by new resin… rebase or reline?
rebase
When should you reline?
denture is not retentive or not stable
What is one thing you have to be sure of when relining and rebasing?
Not chaning the occlusion
What should you check before you reline?
- existing OVD is acceptable
- appearance of teeth and base is acceptable
- acceptable occlusion at CR
- phonetics acceptable
When should you not reline?
Teeth grossly malpositioned / worn
Occlusal plane errors
Poor esthetics/phonetics
OVD in error
What do you need to avoid when relining?
- try not to increase or decrease the OVD
- try not to allow maxillary denture to slide forward
- occlusal errors
What are the steps for a lab reline?
- develop tissue stops at VDO
- remove flange undercuts
- remove 1-2 mm of resin base
- functional impression with lynal (1-2 hours)
- use adhesive and create relief holes
- flask the impression
- place the posterior palatal seal before processing
What is a static impression?
Closed Mouth technique
Patient occludes at OVD
Functional movements made with tongue
Removed moments later, not hours later
Polysulfide, PVS, polyether, etc
Children and young adults will need relines more often. Why is this the case?
they experience acromegaly and the ridges increase in size
