Ivoclar Vivadent IPS e.max Press Abutment Solutions v.2 - Manual (Page 20)

20
Divesting
After cooling to room temperature (approximately 60 minutes), the investment ring may show cracks, which developed
during the cooling phase (immediately around the Alox plunger). This is the result of the different CTEs of the various
materials (Alox Plunger, investment material and press ingot) and does not compromise the press results.
Divest the investment ring as follows:
– Mark the length of the Alox Plunger on the cooled investment ring.
– Separate the investment ring using a separating disc. This predetermined breaking
point enables reliable separation of the Alox Plunger and the ceramic material.
– Break the investment ring at the predetermined breaking point using a plaster knife.
– Always use polishing beads to divest the pressed objects (rough and fine divestment).
Do not use Al
2
O
3
.
– Rough divestment is carried out with polishing beads at 4 bar (58 psi) pressure.
– Fine divestment is carried out with polishing beads at 2 bar (29 psi) pressure.
– Observe the blasting direction and distance to prevent damage to the object margins
during divestment.
– Same as the outer surfaces, thoroughly blast the screw channel with polishing beads
at 2 bar (29 psi) pressure.
– Remove possible ceramic residue from the Alox Plunger with type 100 Al
2
O
3
.
Mark the length of the Alox Plunger.
Separate the investment ring using a separating disc and break it at the predetermined breaking point.
Tip
Pull out the plunger with pliers from the separated segment using a rotating movement.
This also removes any possible ceramic residue from the Alox plunger.