Ivoclar-vivadent SR Ivocron User Manual download pdf (Page 6)

Mixing the Cervical material

Mix SR Ivocron Cervical material in a rubber cup, cover it

and let it sit for 2–3 minutes. The material is ready to use as

soon as it no longer sticks to the spatula.

Applying the Cervical material, pressing

Apply the mixed Cervical material on the exposed cervical

area and cover it with a plastic foil. Placed the preheated

second ﬂask half on the ﬁrst half, close the ﬂask, and press

immediately. Pressure is approx. 1 ton, i.e., somewhat lower

than that needed for the incisal area. Allow to cool under

pressure.

Polymerization

Secure the ﬂask in the clamping frame.

– Single crowns

Place in cold water, heat, and boil for 30 minutes. Allow

to cool slowly.

– Bridges

Preheat in water measuring 70° C (158 °F) for

30 minutes. Then, boil for 30 minutes, and allow to cool

slowly.

Finishing and polishing

Finish the restoration according to the standard procedure

for PMMA materials, i.e. ﬁnishing with burs and rubber

polishers, prepolishing with goat's hair brushes and pumice,

and polishing to a high gloss with cotton wool buffers and

polishing medium (e.g. Ivoclar Vivadent Universal Polishing

Paste).

Characterization

SR Ivocron Intensive powders are reactive polymers. They are

used for strong characterizations or for shade modiﬁcations

of Dentin, Cervical, or Incisal materials.

Depending on the type of the restorations, SR Ivocron

Intensive materials are mixed with Cold, Hot, or Press

Liquid. Make sure that the same liquid is used as for the

other materials. Small quantities of dry material may also be

applied and then wetted with monomer.

Summary of the most important data

Cold Technique

– Mixing ratio by volume

1 part polymer : 1 part monomer

– Mixing ratio in g

1 g polymer : 0.83 g monomer

– Dough time

3–4 minutes

– Working time at 23 °C (73 °F)

Approx. 8 minutes

– Polymerization

In the pressure apparatus at 2–6 bar pressure and

40–50 °C (104–122 °F) for 15 minutes

Hot Technique

– Mixing ratio by volume

1–1.5 parts polymer : 1.5 parts monomer

– Mixing ratio in g

1–1.5 g polymer : 1.25 g monomer

– Dough time

2–3 minutes

– Working time at 23 °C (73 °F)

Depending on the mixing ratio approx. 8–25 minutes

– Polymerization with model

In the pressure apparatus at 2–6 bar pressure and

100 °C (212 °F) for 25–30 minutes

– Polymerization without model

In the pressure apparatus at 2-6 bar pressure and 120 °C

(248 °F) for 10 minutes

Pressing Technique

Dentin and Cervical materials

– Mixing ratio by volume

2.5 parts polymer : 1 part monomer

– Mixing ratio in g

2.5 g polymer : 0.83 g monomer

– Dough time

2–3 minutes

– Working time at 23 °C (73 °F)

Approx. 8–10 minutes

Incisal material

– Mixing ratio by volume

2 parts polymer :

1 part monomer

– Mixing ratio in g

2 g polymer : 0.83 g monomer

– Dough time Incisal

3–4 minutes

– Working time at 23 °C (73 °F)

Approx. 8–10 minutes

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Ivoclar-vivadent SR Ivocron User Manual Page 6

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