Ivoclar Vivadent ProBase Hot - Manual (Page 2)

Description
ProBase
® Hot sets quality standards for heat-curing denture
base materials with regard to working properties, shape and
shade stability and comfort of fit. The material is available in
a variety of shades. Various methods of polymerization
render the material suitable for a number of application
possibilities.
Composition
Powder
Polymethyl methacrylate, softening agent, benzoyl peroxide,
pigments
Liquid
Methyl methacrylate, dimethacrylate (linking agent), catalyst
Indication
– Complete dentures
– Partial dentures
– Combination dentures
– Relining
Contraindication
– Direct intraoral contact of unpolymerized material.
– If the patient is known to be allergic to any of the
ingredients in ProBase Hot
Side effects
In individual cases, local allergic reactions to polymethyl
methacrylate materials have been reported.
Application
Preparation
Isolate boiled-out, well-wetted plaster surfaces with two
layers of Ivoclar Separating Fluid and allow to dry. To ensure
an adequate bond with the denture base, well roughen the
teeth and wet with monomer.
– Isolate plaster surfaces twice.
– Invest wax model with plaster in the flask.
Dosage
– Ideal mixing ratio for one denture
22.5 g polymer (powder) : 10 ml monomer (liquid)
– With dosage system
1 graduation mark polymer : 10 ml monomer
Integrated dosage system
The integrated dosage system ensures an ideal mixing
ratio and, therefore, minimum polymerization shrinkage of
ProBase Hot. The measuring cylinder for the polymer indicates
the quantity of material used for one or two medium-sized
dentures. The graduation on the measuring cylinder for the
monomer is in millilitres. Use the appropriate graduation
mark.
Mixing
Thoroughly mix polymer and monomer in the given ratio by
means of a spatula. Mix thoroughly. Subsequently, leave the
material to mature in the closed mixing cup at room
temperature (23 °C / 73 °F) for approx. 8 to 10 minutes.
Working time
When the material has matured sufficiently and is no longer
sticky, it can be worked for approx. 20 minutes at 23 °C/73 °F.
– Thoroughly mix powder and liquid.
– Dough time and working time depend on the
temperature.
Pressing
Place a sufficient quantity of the resin dough in the hand-
warm (approx. 40 °C / 104 °F), isolated flask halves.
Carefully close flask, load with 80 bar pressure and fix with
a clamp. Maintain pressure.
Polymerization
Heat-polymerization can be carried out in different ways:
Standard procedure (recommended method)
Place closed flask in cold water. Heat up to 100 °C / 212 °F
and let boil for 45 minutes.
Alternative methods
– Place flask in cold water, heat up to 70 °C / 158 °F and
leave it for 30 minutes. Then heat up to 100 °C / 212 °F
and let boil for 30 minutes.
– Place flask in water of 70 °C / 158 °F and leave it for
60 minutes. Subsequently, heat up to 100 °C / 212 °F
and let boil for 30 minutes.
– Place flask in boiling water. Bring the water to the boil
again and then let boil for 40 minutes. This procedure is
only suitable for medium-sized dentures.
– Place flask in cold water, heat up to 80 °C / 176 °F and
polymerize for 10 hours. Switch off heat source and
leave the flask to cool in the same water bath over
night.
– Polymerize the contents of the flask for 10 hours at
80 °C / 176 °F in the drying cabinet.
Residual monomer content can be reduced by
increasing the polymerization temperature and by
prolonging the polymerization length. We recom-
mend using the standard procedure to keep the
residual monomer content at minimum levels.
The residual monomer content after poly merizing
the material according to the standard procedure is
<2.2%.
Cooling
Let the flask cool at room temperature for 30 minutes.
Subsequently, completely cool the flask with cold water.
english
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