??? IDK 8 - 4/3: Relining Complete Dentures Flashcards
What are reasons for the tissue to change?
- Stresses of daily function
- Changes in general health status
- Hereditary factors
- Defects in dentures -→ produce changes in
tissue form
What is a procedure needed every 4-7 years after initial insertion?
Reline/rebase
Why 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 relining/rebasing?
Produce an intaglio surface which fits the mucosa accurately
What are tissue changes that can lead to relining?
Tissue departs from the original form of the denture base
What is the purpose of a 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 surfaces)
What is not altered during relining/rebasing?
Occlusal relationship
What is the process of relining?
adding new resin to the intaglio surface of a denture
What is all of the existing denture base replaced by?
New resin = rebase
What is not altered during rebase?
Occlusal relationship of the teeth
When should you reline the denture?
When it is not retentive, not stable
What should be acceptable during relining?
Existing OVD
What causes an error in relining?
Occlusion acceptable at centric relation position →Error, if present, is slight and is correctable
When should you reline?
- existing OVD is acceptable
- appearance of teeth and base acceptable
- acceptable occlusion at CR (or error is slight and is correctable)
- phonetics acceptable
When should you not reline?
- Teeth grossly malpositioned / worn
- Occlusal plane errors
- Poor esthetics/phonetics
- OVD in error
What are errors to avoid when relining?
- Increasing the OVD
- Allowing maxillary denture to move forward during impression step
- Occlusal relationship errors
What can increase the OVD?
Denture with impression material is not fully seated in place
What alters the occlusal relationships?
Allowing the denture to move forward during reline impression step
hen does relining-develop tissue stop?
At VDO
- remove flange undercuts
- remove 1-2mm of resin base
- functional impression with lynal 1-2 hours
What are the steps of taking 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
What should you do with adhesive when relining?
Use adhesive and create relief holes
When should you place the posterior palatal seal?
Before processing
Who are patients that often need relines?
Children, young adults, acromegaly - ridges increasing in size
