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Denture Duplication
Aims
The transfer of contours from old to new dentures to maintain neuromuscular control.
New dentures will have successful features of old ones.
Any modifications done to the basic shape of old denture should be :
1-- those needed to correct loss of fit (patient’s
complaint) and
2-- those considered essential by the dentist (slight
increase in OVD & replacement of worn acrylic teeth)
Indications
1. For older patients, to have replacement dentures (with
improved fit) similar to those to which patients are accustomed.
2. To renew old deteriorated & stained denture base material,
duplicate denture will have the appearance of a new one.
3. For physically or psychologically impaired pt. who cannot adapt
to new dentures .

Techniques for Denture Duplication
All these techniques are similar except in the use of mould container and materials. Some of these
methods are :
Modified denture flask method
Duplicating flask method
Pour resin flask method
Cup flask method
Soap container method
Agar container method
Techniques for Denture Duplication
1. A mould of old denture is produced in an elastic material, such
supported in a rigid container.

as alginate or silicone putty

2.The wax or acrylic resin template is fabricated from this mould.
3. Any modifications to old denture are performed on this template
patient’s mouth before finishing the prosthesis.
4. In some of the techniques, acrylic teeth are fabricated instead

denture and tried – in the
of using ready-made moulds

Denture Duplication Technique
The Duplicating Flask
Dentures are suspended with a metal rod through sticky wax sprues
Both Dentures are suspended in the agar container.
Molten Agar is poured in the container.
Once Agar is set, the mold is sectioned through the sprue holes to retrieve the dentures.
The mold space after removal of the denture.
Auto-polymerized acrylic resin is then poured in the mold space to produce template dentures for
modifications.
Line drawing showing the mould components
Denture Duplication Technique
‘The Silicon Putty’
Duplicate dentures are then mounted on articulator to replace wax teeth with the selected mould of the
teeth.
When the alginate is set, any flash of the material on the base is trimmed with a sharp knife.
The flask is then filled with a new mix of alginate - avoiding any air entrapment, and the lid is closed.
Sprue holes are then cut into the posterior border of the alginate mold.
The impression is reassembled and held together with adhesive tape. Auto-polymerizing resin is then
run into one of the sprue holes until it rises from the other.
Lastly, duplicate monochrome denture is removed from the flask and mounted on a suitable articulator.
Then pink colored teeth are replaced by selected mold of teeth.
Original and Auto-polymerizing resin
Upper & Lower Template Dentures
Denture Duplication Technique
Modifications / Further applications
1. Addition of a labial flange to an open-face denture
2. Production of Temporary dentures
Teeth are fabricated with dentin colored self-cured acrylic resin before adding tissue colored pink
denture base resin.

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Denture duplication

  • 1. Denture Duplication Aims The transfer of contours from old to new dentures to maintain neuromuscular control. New dentures will have successful features of old ones. Any modifications done to the basic shape of old denture should be : 1-- those needed to correct loss of fit (patient’s complaint) and 2-- those considered essential by the dentist (slight increase in OVD & replacement of worn acrylic teeth) Indications 1. For older patients, to have replacement dentures (with improved fit) similar to those to which patients are accustomed. 2. To renew old deteriorated & stained denture base material, duplicate denture will have the appearance of a new one. 3. For physically or psychologically impaired pt. who cannot adapt to new dentures . Techniques for Denture Duplication All these techniques are similar except in the use of mould container and materials. Some of these methods are : Modified denture flask method Duplicating flask method Pour resin flask method Cup flask method Soap container method Agar container method
  • 2. Techniques for Denture Duplication 1. A mould of old denture is produced in an elastic material, such supported in a rigid container. as alginate or silicone putty 2.The wax or acrylic resin template is fabricated from this mould. 3. Any modifications to old denture are performed on this template patient’s mouth before finishing the prosthesis. 4. In some of the techniques, acrylic teeth are fabricated instead denture and tried – in the of using ready-made moulds Denture Duplication Technique The Duplicating Flask Dentures are suspended with a metal rod through sticky wax sprues Both Dentures are suspended in the agar container. Molten Agar is poured in the container. Once Agar is set, the mold is sectioned through the sprue holes to retrieve the dentures. The mold space after removal of the denture. Auto-polymerized acrylic resin is then poured in the mold space to produce template dentures for modifications. Line drawing showing the mould components Denture Duplication Technique ‘The Silicon Putty’ Duplicate dentures are then mounted on articulator to replace wax teeth with the selected mould of the teeth. When the alginate is set, any flash of the material on the base is trimmed with a sharp knife. The flask is then filled with a new mix of alginate - avoiding any air entrapment, and the lid is closed. Sprue holes are then cut into the posterior border of the alginate mold. The impression is reassembled and held together with adhesive tape. Auto-polymerizing resin is then run into one of the sprue holes until it rises from the other. Lastly, duplicate monochrome denture is removed from the flask and mounted on a suitable articulator. Then pink colored teeth are replaced by selected mold of teeth.
  • 3. Original and Auto-polymerizing resin Upper & Lower Template Dentures Denture Duplication Technique Modifications / Further applications 1. Addition of a labial flange to an open-face denture 2. Production of Temporary dentures Teeth are fabricated with dentin colored self-cured acrylic resin before adding tissue colored pink denture base resin.