Dentsply Sirona Biodent K+B Plus/OVS II Mode D'emploi page 21

Dentine and neck materials
First mix the dentine material and allow about 6 minutes for doughing . Then pack the
hollow mould completely with the paste . Cover with separating foil and close the flask .
Leave the flask in the press and mix the neck material .
Open the flask, cut away the dentine in the neck area and apply the prepared neck
material . After a trial closure – and any necessary corrections in the neck area – clamp the
flask down and pre-cure for 10 minutes .
Enamel material
After the pre-curing, grind away the dentine in the incisal area as in the Biodent blending
diagram (Figs 6–9) . Then mix the enamel material, apply it, cover with separating foil and
press . Check layering and correct as necessary .
Curing
Heat the clamped-down flask up to 100 °C in not more than 30 minutes; then boil for 30
minutes more . Cool the flask off slowly to room temperature .
Fig . 11
Cold Curing (Liquid K)
Applications
• Corrections to crowns and bridge veneers
• Repairs
• Attachment of plastic teeth in the flask-pack method
• Temporary crowns and bridges in the laboratory .
Pack undercuts with sealing compound and coat dies and adjacent parts of the cast with
Isolation Fluid K . Soak plaster dies in water before isolating to eliminate air . The isolat ing
film must be left to dry for 10 minutes before applying the plastic .
Mixing
In cold curing the Promotor K is required for hardening . First mix powder and Promotor K
in the proportion of 10:1 by weight .
Place 1 large measure of powder and 1 small measure of Promotor K in the special mixing
vessel and shake well . Mix this blend on the palette with monomer K to a creamy-to-pasty
consistency, depending on the nature of the work .
Working time may be up to 4 minutes after mixing, depending on consistency and room
temperature .
The powder/ Promotor mixture is workable at room temperature for 4 weeks .
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