Technical Instructions
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Pouring or press-packing a partial using ULTRAflex flexible
composite resin
Information provided by Astron Dental Corp. Photos by Scott Ward,
Ward Dental Laboratory.
ULTRAflex
flexible partial resin denture material is formulated
to simplify the fabrication of partial dentures
utilizing conventional laboratory techniques. The non-methylmethacrylate
composite can be processed with either conventional
press packing or pouring techniques without the use of
special equipment.
Following are step-by-step procedures for pouring or
press-packing a partial denture. For either procedure,
diatoric holes should be drilled in teeth to ensure
optimum retention. The use of Astron bonding agent is
suggested. Fig. 1 shows the right side of the wax-up
before processing.
Fig. 1 Right side of wax
up before processing.
Press-packing technique
1. Prepare denture mold using the flasking
technique (Fig 2).
Fig. 2 Flex investment in
flask. First pour before boil out.
2. Into the clear measuring cup pour 1/2-ounce of
liquid resin; in the blue measuring cup add 1-ounce of
powder. Note: ULTRAflex powder and liquid resin should
be stored in the refrigerator and removed just prior
to mixing and pouring.
3. Combine liquid and powder in the mixing bowl and
mix thoroughly. Pour the mixture into the denture mold
(Figs. 3 and 4).
Fig. 3 After boil out,
apply separator.
Fig. 4 Flex invested
after boil out.
4. As soon as mix reaches a doughy state (5 to 8
minutes), pack into regular denture mold using
press-packing procedures (Fig. 5).
Fig. 5 Flask in pressing
unit.
5. Cure for two hours in 130°F water.
6. Cool for 15 minutes under cold running tap water.
Pouring technique
1. Repeat press-packing technique steps 1 through
3.
4. Cure in a pressure pot as soon as possible at 130°F
and 20 psi for 45 minutes.
5. Remove the pour denture mold from the pressure pot
and place under cold running tap water for 15 minutes
before removing denture from pour mold.
Finish and Polish
After the initial steps for press-packing or
pouring, finish and polish (Fig. 6).
Fig. 6 Finishing the
partial.
Fig. 7 shows the right side of the finished partial on
the model.
Fig. 7 Finished partial
on model.
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Important notice to South
African dentists.
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"Far and
away the best prize that life offers is the
chance to work hard at something
worth doing."
Thomas Jefferson (1743-1826)
third president of the U.S.
principal author of the
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