Ivoclar Vivadent ProBase Cold - Manual (Page 2)

Description
ProBase
® Cold is a self-curing denture base material. It
demonstrates excellent flow and modelling properties. It is
easy and reliable to use with the pouring or packing
technique, even when two or more saddles are present. The
material is available in a variety of shades. As the powder
and liquid can be dosed as desired within the usual limits,
users can vary the consistency and working time of ProBase
Cold.
Composition
Powder
Polymethyl methacrylate, softening agent, benzoyl peroxide,
catalyst, pigments
Liquid
Methyl methacrylate, dimethacrylate, catalyst
Indication
– Partial dentures
– Combination dentures
– Relining
– Repairs
– Complete dentures
Contraindication
– Direct intraoral contact of unpolymerized material.
– If the patient is known to be allergic to any of the
ingredients in ProBase Cold
Side effects
In individual cases, local allergic reactions to polymethyl
methacrylate materials have been reported.
Application
Pouring technique
Preparation
Isolate boiled-out, well-wetted plaster surfaces with two
layers of Ivoclar Vivadent Separating Fluid. Allow to dry, well
roughen the teeth, apply mechanical retention, and wet
with monomer to ensure an adequate bond with the
denture base.
Dosage
– Ideal mixing ratio
15 g polymer (powder) : 10 ml monomer (liquid)
Mixing
Thoroughly mix polymer and monomer with the spatula.
Subsequently, allow the mixture to rest for 15 seconds to
permit any trapped air to rise.
Flow phase
At room temperature (23 °C / 73 °F), the flow phase is
approx. 2.5 to 3 minutes. Pour the material into the saddle
within this time span.
Modelling phase
The material is set after a transition period of approx.
4 minutes. It can be modelled during an additional
3 minutes.
High room temperatures shorten the flow and
modelling phase.
Polymerization
Polymerization is carried out in a pressure device (e.g.
Ivomat) at 40 °C / 104 °F and at 2 to 6 bar pressure for
15 minutes.
Finishing
Remove the precast, finish and polish in the usual manner.
Packing technique
Preparation
Isolate boiled-out, well-wetted plaster surfaces with two
layers of Separating Fluid and allow to dry completely. Well
roughen the teeth and wet with monomer to ensure an
adequate bond with the denture base.
Dosage
Ideal mixing ratio for one denture: 20.5 g polymer
(= 1st graduation on measuring cylinder): 10 ml monomer
Integrated dosage system
This system ensures an ideal mixing ratio and, therefore,
minimum polymerization shrinkage of ProBase Cold. The
measuring cylinder for the polymer indicates the quantity of
material required for one or two medium-sized dentures.
The graduation on the measuring cylinder for the monomer
is in millilitres.
Mixing
Thoroughly mix polymer and monomer in the given mixing
ratio with a spatula. Mix thoroughly. Allow the dough to
mature in a closed mixing cup for approx. 3 to 4 minutes.
Subsequently, work the dough within approx. 2 minutes.
High room temperatures shorten the working time.
Pressing
Place a sufficient quantity of the resin dough in the hand-
warm, wetted and isolated flask halves. Carefully close flask
and load with 80 bar pressure. Fix with a clamp.
Polymerization
Polymerization is carried out by means of the clamp or a
pressing device under constant pressure for 30 minutes (if
the room temperture is 23 °C / 73 °F).
Deflasking and finishing
Open the flask and remove plaster. Check occlusion of the
denture. Subsequently, finish and polish in the usual
manner.
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