Oxide Firing; Ceramic Veneering; Soldering; Soldering After Firing - DENTAURUM remanium star Mode D'emploi

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5. Preparation of surfaces for ceramic veneering
Grind the metal surfaces with tungsten carbide tools to ensure a gradual transition. Blast the
surfaces with a fine "pen-type" shot blasting tool using pure aluminium oxide of medium grain
(125 µm) at a low pressure of 2 – 3 bar. Clean with ultrasonic cleaner in distilled water.

6. Oxide firing

Oxidation firing is not required with remanium
to visually check the framework condition (5 minutes without vacuum at the firing temperature
of the opaque, unless otherwise indicated by the ceramic manufacturer). Following the bake, the
oxide should be removed by blasting with single use aluminium oxide abrasive, grain size 125 µm
and low pressure of 2 – 3 bar. Afterwards the surface must be cleaned again.

7. Ceramic veneering

remanium star can be veneered using conventional ceramics such as Dentaurum ceramics as long
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as the CTE is suitable with the alloy (see alloy info supplement).
The coefficient of thermal expansion (CTE) of many ceramic varieties increases, depending on
the amount of times the ceramic is fired and the length of time within the firing furnace.
The longer and the more often the ceramic is fired, the higher the CTE. The metal CTE
remains constant; the adhesion takes place by applying cooling times after firing and standby
temperatures.
The opaque material can be applied to the sandblasted and cleaned metal framework
according to the ceramic manufacturer's recommendation.
It is important to dry the opaque thoroughly. Always ensure the ceramic furnace is calibrated!
The ceramic is then applied according to the instructions for use!
If no other information is given by the ceramic manufacturer, the object is cooled as
recommended in the alloy info supplement.
Important: After each firing, brush the framework under running water and allow
it to dry.

8. Soldering

Try to avoid soldering if possible in order to prevent a material mixture. If however, it is
necessary to solder, please ensure a suitable solder with the correct composition and melting
temperature which is appropriate for the alloy used.
Roughen the joint areas with fine corundum stones.
Connect the parts using wax or acrylic, remove from the dies and fix in investment material for
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star. It is advisable to fire an oxide bake in order
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soldering. Boil out. Apply a coat of flux to the solder joint areas. Allow the model to dry, then
preheat at 600 °C / 1112 °F for 10 min. Apply a further coating of flux and heat the casting
until it is red hot. Cut the solder to the appropriate length, dip the pieces into the flux and
place them into the soldering gap. The flux on the piecesof solder and soldering gap must be
heated with a hot flame until it covers the joint area completely. Only then bring the solder to
flow through the hot flame.
Caution: Soldered units should cool slowly after the ceramic has been fired.

8.1. Soldering after firing

It is not recommended to solder after having applied the ceramic. The reason for this is that
the corrosive resistance is reduced and the low diffusion ability of precious metal solders to
non-precious alloys. Recommended alternatives are joining techniques such as laser welding,
WIG welding and adhesive joining.

9. Laser welding

The laser welding technique produces a solder-free, mechanically strong and corrosion
resistant joint.
It is important to observe the framework design, the surface structures, the welding sequence
and the welding parameter of each individual laser machine. Suitable welding material is laser
welding wire adapted to all remanium ® alloys.

10. Cleaning

Crowns and bridgework made in remanium
solution P.

11. Contraindications and side effects

Signs of intolerance to remanium star after are rare correct processing.
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If the patient has a proven allergy against any component within the alloy, for safety reasons
this alloy must not be used.
If various alloys have been used, it is possible that galvanic effects may occur.
Some patient have shown traces of local irritation caused by electrochemical reactions.
star can be cleaned, after finishing, with ultrasonic
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