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The hollow maxillary
complete denture: Amodified techniqueMADE BY-Dr. AMIT
MDS PROSTHODONTICS
(1ST YR)
O'Sullivan M, Hansen N, Cronin RJ, Cagna DR.The hollow
maxillary complete denture: A modified technique. J Prosthet
Dent 2004 Jun;91(6):591-4.
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INTRODUCTION
HEAVY MAXILLARYCOMPLETE DENTURE
LARGERESTORATIVE
SPACE
NARROWERRIDGE DUE TORESORPTION
DECREASEDSUPPORTING
TISSUE
Extreme resorption of
the maxillary denture-
bearing area
problems with prosthetic
rehabilitation.
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INTRODUCTION
Reducing the weight of a maxillary prosthesis has
been shown to be beneficial when constructing an
prostheses for the restoration of a large maxillofacial
defect or severe residual ridge resorption.
make the denture base hollow.
el Mahdy AS. Processing a hollow obturator. J Prosthet Dent
1969;22:682-6.
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INTRODUCTION
Historically, weight reduction approaches
have been achieved using a solid 3-
dimensional spacer, including Dental stone,
Cellophane wrapped asbestos,
Silicone putty, Modelling clay
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INTRODUCTION
Multiple and separate pieces of the prosthesis are polymerized
around a 3-dimensional spacer.
Following the initial polymerization process, the solid spacer is
removed.
Individual pieces of the prosthesis are then joined using
autopolymerizing acrylic resin repair techniques.
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TECHNIQUE
1. Impression of the maxillary residualridge and fabricate to trial denture
stage.
2. Index the land area of the cast & sealthe trial denture to the definitive cast
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TECHNIQUE
3. Duplicate the trial denture in reversible
hydrocolloid and pour the impression indental stone.
4. Make a clear template on the
stone cast using a 0.3-mmthermoplastic sheet
5. Process the trial denture in the
standard manner through
the wax elimination stage.
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TECHNIQUE
6. Adapt 2 layers of baseplatewax to the definitive cast inthe drag, conforming to theborderextensions.
7. Use a second flask toinvest the baseplate waxand again complete thewax elimination process.
Pack the cope and seconddrag with heat-polymerizedacrylic and process.
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TECHNIQUE
8. Separate the cope, with thepolymerized acrylic resinstill attached, from thedrag. Place the clear matrixon the definitive cast usingthe indices in the land areaas seating guides .
9. Use an endodontic file witha rubber stop to measurethe space between thematrix and the processedresin.
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TECHNIQUE8. Mix and adapt vinyl poly-
siloxane putty to the bur-
roughened acrylic resin andshape to the approximatecontours of the matrix .Shape the polymerized puttywith a bur to leave 2-3 mm of
space between the putty andmatrix.
9. Provide an additional 1-mm
space over the tooth portionof the denture.Fix the putty tothe acrylic resin usingcyanoacrylate.
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TECHNIQUE
Reseat the original cope on the drag and verifycomplete closure of the flask.
Mix, pack, and polymerize the acrylic resin.
Verify adequate thickness of resin around the teethat the packing stage using a periodontal probe.
Recover the processed denture in the usualmanner.
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TECHNIQUE
Remount the denture on anarticulator and adjust the occlusionas necessary. Cut 2 openings with abur into the denture base distal to themost posterior teeth.
Remove the silicone putty byscraping with a sharp instrument.Widen the openings as necessary,laterally, to facilitate access.
Remove the putty and fabricate 2covers using clear auto-polymerizingresin.
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Clean and disinfect the cavity
Attach the clear resin covers by bonding them into positionusing auto-polymerizing resin or light-polymerizing .
Polish the denture in the usual manner. Verify that thecavity is sealed by immersing the denture in water.
If no bubbles are evident, an adequate seal is confirmed.
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DISCUSSION
Heat-polymerizing portion of the dentureagainst polymerized resin may reduceleakage at the junction of the 2 portions ofthe denture.
The small window in the cameo surfacefacilitates recovery of the spacer in an
area that is not commonly adjusted afterdenture insertion and has a small marginalong which leakage could occur.
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DISCUSSIONControlling and verifying resin thickness
Putty and clear matrix, ensuring an even depthof resin to prevent seepage and preventdeformation under pressure of flask closure.
Using a periodontal probe, allowingrecontouring of the putty at that time if required.
Why Silicone putty ?
Stability
Its ability to be carved
Does not adhere to acrylic resin. The cyano-acrylate bond between the resin and
the putty may be easily removed.
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The hollow denture: An
alternative treatment for
atrophic maxillae
This article describe the fabrication of
hollow denture using double flasktechnique
Fattore LD, Fine L, Edmonds DC. The hollow
denture: an alternative treatment for atrophic
maxillae. J Prosthet Dent 1988;59:514-6.
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TECHNIQUE
Impression of the maxillary residual
ridge and fabricate to trial denture
stage with heat cure denture base.
Invest the waxed denture in a flask Heat the flask, open it, and flush away
the remaining wax
After the flask has cooled, adapt a
2 mm thick portion of baseplate waxto the tooth side of the flask.
Note: The heat-cured baseplate is in
place on the tissue side of the flask
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TECHNIQUE
Place the halves of the flask togetherwith a plastic sheet between them.
Remove the knock-out plate from the
bottom half of another similar flask andplace it on the upper part of the original
flask containing the teeth with wax
adapted over them.
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TECHNIQUE Vibrate dental stone through the knock-out hole in
the alternate half flask until it is level full.
Boil out, clean, and apply tin foil substitute as
usual.
Pack and process with heat-curing, high-impact
acrylic. resin. Cool, separate the flask, and carefully remove any
flash but do not deflask.
Both halves of the original flask now contain a
processed acrylic resin shell. Fit the two halves of the flask together and remove
any acrylic resin that interferes with complete flask
closure
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TECHNIQUE
Make a rope of doughy, heat-curing, high-impactacrylic resin approximately the diameter of a lead
pencil.
Adapt the acrylic resin rope around the border of the
cured acrylic resin in the tooth side of the flask.
Add a plastic sheet, trial pack, trim the flash, andcontinue packing until no flash is evident.
Moisten the new acrylic resin slightly with monomer.
Close the flask, place it in a curing press, and
process with a long-curing cycle.
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A hollow complete lower
denture
This article describe the fabrication of
hollow denture using split flasktechnique
Holt RA Jr. A hollow complete lower denture. J Prosthet Dent
1981;45:452-4.
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TECHNIQUE
The complete lower wax denture is boiled out, and the flask is separated inthe usual manner. The hollow denture is constructed using two split dental
flasks as follows:
Place a wax shim (consisting of
two layers of baseplate wax) over the
denture teeth area.
Place the top half of a second split
flask over the wax shimmed lower
half of the flask.
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TECHNIQUE
Pour stone into the flask
through the open hole
Boil out the wax shim.
Pack in acrylic resin,
process,and separate.
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TECHNIQUE
Place two layers of baseplate wax overthe residual ridge in the top half of the
original flask.
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TECHNIQUE
Place Insta-mold between the wax shimand the processed acrylic resin on the
residual ridge area.
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TECHNIQUE
Notch the processed acrylic resin and
the wax shim for keying when the two
halves are put together later. Boil out the wax shim, pack, and
process and separate the flask.
Remove the Insta-mold.
Fuse the two resulting acrylic resin
parts together with cold-cure acrylic
resin.
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Notching of processed acrylic resin and
the wax shim for keying
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Denture is floated in water totest for leakage
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SPLIT FLASKTECHNIQUE
SILICONEPUTTY
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REFERRENCES
1. O'Sullivan M, Hansen N, Cronin RJ, CagnaDR.The hollow maxillary complete denture:
A modified technique. J Prosthet Dent 2004
Jun;91(6):591-4
2. el Mahdy AS. Processing a hollow obturator.J Prosthet Dent 1969;22:682-6
3. Fattore LD, Fine L, Edmonds DC. The
hollow denture: an alternative treatment foratrophic maxillae. J Prosthet Dent
1988;59:514-6.
4. Holt RA Jr. A hollow complete lower denture.
J Prosthet Dent 1981;45:452-4.
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THANK YOU