Cera F 25g

Type IV for metal-ceramic, inlays, crowns, bridges & telescopic technique

Working procedure for CERA F

1. Indication. Yellow dental alloy for metal-ceramic, inlays, crowns, bridges and telescopic technique.
2. Contraindication. If patients are known to be allergic to any of the components, the material should not be applied.
3. Sprueing. According to the indirect method: 3 mm ø for crowns, 3.5 mm ø for pontics, runner bar 4-4.5 mm ø.
4. Investing. Invest in a reliable phosphate-bonded investment, such as Carrara Universal DL Investment
5. Burn out. Preheat at 750°C/1382°F for 30-120 min. depending on the size of the muffle ring.
6. Casting. Casting temperature: 1170°C/2138°F in a graphite crucible; or with the flame in a ceramic crucible with Elephant Proflux.
Use at least 1/3 new metal at each casting. Clean the metal well before re-use, for example by means of sandblasting and steam-cleaning.
7. Finishing. Use carbide burs and/or ceramic bonded stones.
The final trimming must be carried out in one direction only by means of fine crossteethed carbide burs!
Sandblast with 50-125 micron aluminumoxide (Alublast), (pressure max. 3 bar).
8. Cleaning. With distilled water ultrasonic or by means of a steam cleaner.
9a. Oxidation. 3 minutes at 860°C/1580°F without vacuum.
9b. Oxidreduction. Sandblast with aluminum oxide 125 µm (pressure max. 2 bar) or pickle for max. 1 min. in clean pickling agent.
Afterwards clean again (see point 8).
10. Bake. With Carrara Interaction, cooling stage; 2-3 minutes.
11. Pre-soldering. Carrara 950°C/1740°F with Elephant Paste Flux.
12. Post-soldering. Carrara 750°C/1380°F with Elephant Paste Flux.

For a reliable quality we advise to use Cera E in combination with CeraMotion LF from Dentaurum