DeguDent Cergo Kiss Instrucciones Para El Uso página 19

thickness: 2.5 mm). For posterior teeth, wax up a reduced
anatomical form (including the occlusal profile), a type of
dentinal core, in order to ensure sufficient stability.
Sprueing (Figure 3)
• Wax up the pressing sprue in the position of maximum
circumference, in the direction of the flow (incisal for
copings, proximal for inlays). Make sure the diameter of
the sprue is not reduced at the contact point; ensure a
large connection area.
• Sprue length for Cergo Press: 5–6 mm; for Multimat
Touch+Press: 2–3 mm.
• Position all pressing objects at the edge of the base at
the same height, i.e. with all object margins at the same
level. This will automatically result in sprues of different
length. That is fully acceptable.
Up to 0.6 g wax weight:
1 pressing pellet
Up to 1.4 g wax weight:
2 pressing pellets
Up to 4.8 g wax weight:
8 pressing pellets Cercon
Investing (Figure 4)
• Place the muffle ring on the muffle former.
• Mix the investment material (Cergo fit or Cergo fit
SPEED) as per the manufacturer's instruction. Vibrate
lightly into the muffle avoiding bubble formation, until all
objects are completely covered with investment. Top off
the muffle without vibrating.
• Place the muffle gauge to ensure correct muffle height
and to provide for a 90-degree position of the muffle
base relative to the pressing direction of the pressing
oven. When placing the muffle gauge, investment com-
pound must exit from the gauge opening.
• Let muffle rest until the investment (Cergo fit or Cergo fit
SPEED) has set. Protect from vibration.
Pre-heating (Figure 5)
• When the investment has set, remove the various parts
of the muffle.
• The muffle gauge contact point is cleaned and checked
for 90-degree orientation. The muffle must not "rock", as
this may result in pressing errors.
• The muffle is placed in the pre-heating oven together
with the aluminium oxide pressing die, which must be
free of ceramic residue. The base temperature of the
pre-heating oven will depend on your choice of invest-
ment material (refer to pertinent Instructions for Use).
• Heat the muffle from room temperature to 850 °C (refer
to investment manufacturer's recommendations for the
proper heating procedure).
• When using Cergo fit SPEED investment, you may place
the muffle directly into the oven pre-heated to 850 ºC
after a setting period of 15 minutes.
® 2
100-g muffle
200-g muffle
® PressMaster muffle (400 g)
Pressing technique
• Activate pressing program (see Pressing programs on p. 18)
• Remove the muffle from the pre-heating oven once the
starting temperature of 700 °C has been reached.
• Place Cergo Kiss pellets in the muffle channel.
• Position the pressing die.
• Immediately place the muffle thus prepared in the pres-
sing oven and start the pressing program (for Cergo
press: press the start button one more time).
• Once the pressing process has been completed (after
approximately 45 minutes), remove the muffle from the
pressing oven immediately and allow to slowly cool to
room temperature.
Divesting (Figure 6–7)
• Indicate the position of the pressed objects using the
pressing die.
• Make a deep cut into the investment compound,
preferably using a diamond-covered and sintered large
carbide disc or a carbide disc for metal castings.
• Separate the part of the muffle containing the aluminium-
oxide pressing die from the rest of the muffle by turning
in opposite directions.
• Use a jet polisher (50 µm, 4 bar; do not use a revolving-
jet unit) to remove the investment all the way to the
pressed objects. In doing so, make sure not to touch the
objects (abrade the "internal cylinder" and remove the
external ring of investment).
• Once the objects have become visible, continue
abrading across the area using reduced pressure (2 bar).
• Clean the aluminium-oxide pressing die using
aluminium-oxide abrasive and rinse.
Finishing (Figure 8)
• Cut off the sprues using water cooling and no pressure.
• The restoration to be veneered or painted is then finished
using diamond burs or stones. This will maintain the sur-
face texture function.
• Use a steam cleaner (Aquaclean) to clean the object.
Do not approach the object too closely with the nozzle
(risk of local overheating).
Cergo Kiss: All pellets are compatible with
painting and layering techniques.
Staining technique (Figure 9)
• Detailed characterization of the ceramic surface as a
stain firing (layering technique).
• Complete colour characterization after pressing with the
P1 and P2 pellet. Reproduces all "V" colours.
• Gross or detailed characterization of all pressed pellets
(staining and layering technique).
• Use for all CTE-adjusted ceramics.
• In principle, all pellets can be used with body and incisal
staints.
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