Thin Veneers
The less room there is for the veneer, the harder
it is to get the required Biodent shade, depth
effect and body. Here the proper use of
the additional opaques on top of the neck
opaques will be of assistance. Thus, for ex-
ample, the dentine opaque can be lightened
with 01. In the incisal area additional effects
can be obtained with opaques O2 and O3.
Examples of the Use of Opaques O1–O4:
O1 – white: brightens all dentine-coloured
opaques
O2 -– transparent-grey/O3 – blue-grey:
To provide more translucency in the incisal
area, apply opaque O2 – shaded if neces-
sary with O3 – without perceptibly encroach-
ing on the dentine-coloured opaque, thus
avoiding an abrupt transition at the tip.
O4 – pink: covers retentions in contact with
the gum
OVS II Opaque Thinner
lf the opaque thickens after a time it can be
made less viscous by adding a few drops of
thinner (shake well!).
Clean brushes well with the thinner after use
– but never use thinner in which brushes
have been cleaned for thinning opaques
(risk of contamination).
Note
A reliable bond between plastic veneer and
metal framework is achieved by the OVS
System (Opaque Resin Bonding System).
The system consists of coating the metal sur-
face electrolytically with a tin oxide layer to
prepare the surface for a micromechanical
and chemical bonding with the special OVS II
opaque resin (see separate OVS Instruction
Manual).
Fig. 3
Direct Build-up Method (Liquid S)
Mix the material to a paste on the palette
with the Biodent K+B instrument. The same
instrument is suitable for applying and mould-
ing the paste.
Pack undercuts on dies and adjacent plaster
teeth with sealing compound and coat the
dies and adjacent parts of the cast with Iso-
lation Fluid H. Soak the plaster dies in water
before isolating to eliminate air. The isolating
film must be left to dry for 15 minutes before
applying the plastic paste.
Mixing
Mix the materials immediately before use. The
ratio of liquid and powder is 1:2 by weight.
First pour the monomer into the hollow of the
palette and dispense powder until all the
monomer is absorbed. The surface is then
slightly glossy. Mix well for 15–30 seconds.
The proportions are right when the paste
hardly drips from the spatula.
Doughing time is from 2 to 4 minutes, depend-
ing on room temperature. Then knead the
dough well with the spatula. lf it is still tacky
and cobwebby, moisten the instrument with
monomer and smooth the dough. The right
consistency is reached when the material is
no longer tacky and does not cobweb but is
plastic and malleable (if the material is cut
into, the cut should not close up). lt can now
be applied for up to 15 minutes. After that,
there is still plenty of time, even in multi-span
bridgework, for modelling and carving
(another 30 minutes).
Layering (Figs 4–10)
O = Opaque
D = Dentine
S = Enamel
H = Neck
T = Transparent
The materials are applied in the order neck,
dentine, enamel material.
English
7
Содержание Biodent K+B Plus
Страница 2: ...2 Fig 1 Fig 2 Biodent K B Plus...
Страница 3: ...3 Fig 3 Fig 4 Fig 5 Fig 6 Fig 7 Fig 8 Fig 9 Biodent K B Plus...
Страница 4: ...4 Fig 11 Fig 10 Biodent K B Plus...
