Ivoclar Vivadent SR Ivocap System User Manual

Page 7

provided with a channel at the distal end or an inter-
connecting ring channel (dotted line) can be fabricated
(Fig 3c).

Prior to investing the antagonist part, the injection channels are
formed with pink wax. This can also be done after boil-out or
before isolating by simply milling them in.

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Injection channels must have a diameter of
3–5 mm

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Choose the shortest path

–

Make sure not to damage the investment edges
along the injection funnel; they form a seal
towards the posterior shoulder of the flask.

Investment (upper flask half)
Place the upper flask half on the lower one after isolating
it with Vaseline or Ivoclar Vivadent Separating Fluid. Mix
the plaster and pour over teeth, avoiding the formation of
bubbles, until the incisal and occlusal areas are lightly
covered.

To make deflasking easier, apply a paper insert as a
separation layer (the insert should be moistened with
water).
Then, fill the flask to the brim, put on the cover and completely
press down by hand.
Do not close the flask with a press!

Boil-out procedure
Preheat the flask in very hot water for at least
5 minutes. Remove wax and thoroughly boil out with hot
and clean water. Allow the flask halves to cool to room
temperature. Remove adhering plaster residue from the
flask edges and thermal insulation component.

Isolation
Isolate the still moist plaster surfaces twice with Ivoclar
Vivadent Separating Fluid. Separating with a suitable
spray gun is also possible. Avoid pooling, eg in the
gingivobuccal fold or interdental areas. Do not rinse
isolated areas with water.

Capsule preparation
Contents of capsule: 20 g polymer, 30 ml monomer
a) Remove monomer container from the capsule and
break open by twisting off the sealing cap.

b) Pour the monomer into the capsule.

c) Re-insert the monomer container into the capsule base

prior to mixing.

Start mixing immediately following the addition of the
monomer (5 min in the Cap Vibrator).

d) Mount the capsule in the Cap Vibrator, secure it with a
rubber band and mix for 5 minutes.

The SR Ivocap denture base material should form a ball in the
process. If this is not the case after 5 minutes of mixing, the
material can be mixed for an additional 30 seconds. The failure
of the material to form a ball does not influence the quality of
the denture base material.

Do not mix longer than 7 minutes, as the resin may
become too warm, which increases the risk of premature
polymerization.

e) Remove the empty monomer container, eg with
compressed air, place the capsule on the capsule plunger
and press the contents upward with light rocking
movements. Allow air to escape through the capsule
opening.

There should be no air between the plunger and the
contents. Previously mixed capsules can be
refrigerated in the dark for 5 days. Allow them to
regain room temperature before reuse.

Clamping of the flask
Place the injection funnel with the inserted funnel in the
lower flask half. Carefully bring together the two flask hal-
ves and ensure the correct fit of the flask lids.

Then, completely insert the flask into the clamping frame. Apply
3 tons / 6000 lbs pressure to the clamping frame with the flask
in a hydraulic press (corresponds to about 80 bar / 1133 psi
hydraulic pressure). At the same time, push the ratchet (B1) on
the clamping frame to the right. After that, cease applying pres-
sure and remove the clamping frame with the flask from the
press.

Inserting the SR Ivocap capsules
Remove the cover from the capsule and fully insert the
capsule into the flask.

Mounting the pressure apparatus
Fully extend the plunger of the pressure apparatus, eg by
pulling the piston rod when the compressed air locking
valve is open.

Place the SR Ivocap pressure apparatus on the flask, lift the
safety loop (A1) and press the plunger into the capsule until
the vise shanks are correctly positioned on the flask. Then, pull
down the safety loop until it snaps into place.

Injection
Connect the pressure apparatus with the compressed air
locking valve closed to the compressed air supply (6 bar /
85 psi). Slowly open the locking valve. The plunger will
descend and press the SR Ivocap material into the mould.

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SR Ivocap material which is left over or which has
been in a mixed state for some time requires a lon-
ger injection time of 10 minutes.

–

Allow leftover material to regain room temperature
before use.

–

When the red ring on the piston rod becomes
visible during injection, mix a new capsule and
replace the empty one.

Polymerization
Place the SR Ivocap assembly in a suitable polymerization
bath. The surface of the water should be covered with pla-
stic floaters in order to prevent unnecessary loss of heat
(isolation). When immersing the SR Ivocap assembly in the
polymerization bath, make sure that no plastic
floaters are trapped beneath the clamping frame.