Relining, Rebasing, and Repairing RPD Flashcards
The most basic of the RPD maintenance techniques
-It involved adding new denture base material to the existing resin to make up for loss of tissue contact caused by resorption of the alveolar ridge
Relining
What is the best way to evaluate the space under the denture base?
Runny alginate impression (1 powder; 2 hot water)
If at least ___ mm of alginate is present under the denture base or if indirect retainer lifts, the patient can be considered a candidate for a reline or rebase
2 mm
The amount of space under the _____ is an indicator of the amount of space to be found under the denture base
Indirect retainer
Resin base is prepard for a reline impression by ______
Removing a uniform amount of denture resin from the intaglio surface of denture base
Why is resin removed from denture base for impression reline?
Adequate space
Retention/Bonding
In case of ___ tissue on crest of ridge, use free-flowing zinc oxide eugenol impression material
Mobile tissue
In case of _____ denture base tissue, use any of the other normal impression materials (VPS)
Dense firm tissue
_____ materials may also by used as impression material for reline although there is no advantage and can easily distort
Tissue conditioning materials
The most critical step in the reline procedure is the maintenace of the ___ relationship during set of impresion
Tooth-framework
Should the patient close teeth into contact during reline impression?
No
SMall defects in the impression can usually be corrected with _______
Mouth temp wax
HOw long will the mouth temp wax take to act properly?
12 minutes
_____ are inferior to lab relines
Use chemically activated resins that are intended to be used for the intraoral reline
-porous and lack color stability
Intraoral reline
____ is a lab technique in which the bulk of the denture base is removed and replaced using new resin
Rebase
Indications for _____:
Denture bases don’t extend to cover all of denture-bearing tissues
Denture base has fractured
Denture base has become irreparably discolored
Rebase
The denture resin is ____ and ___ to allow room for readaptation of the borders with modeling plastci
Relieved and shortened
When both denture base and denture teeth are involved in a maintenance or repair situation, the partial denture may need to be stripped of both teeth and denture base
Remake
If 2 pieces of denture base fracture, what do you do to repair?
Lute the pieces together with sticky wax
Max a matrix under the area using dental stone
Relieve the area and add dovetails for retention of new resin
Add chemically activated resin to prepped line
Place in hot water pressurized pot
Finish and polish
What is the purpose of the hot water pressurizer pot?
Decrease porosity
What do you do if tooth pops out of denture base?
Matrix of teeth using PVS Diatorics in tooth for retention of the acrylic Relieve denture base Add chemically activated resin Finish and polish
