Non-precious metal comes of age - page 5

The author is of the opinion that the
good polishing properties of Ceramill
Sintron are also due to the finer grain size
of the alloy particles. On average they are
about forty times (!) smaller than the
grain size of a casting alloy. This makes
the metal structure more homogeneous.
There are also no types of inclusions or
contraction cavities as can occasionally
occur with casting alloys.
The Vickers hardness of Ceramill Sintron
is 280 (hv 10). In comparison the Vickers
hardness of Girobond NB casting alloy
fromAmannGirrbach is 320 (hv 10) [2].
The slightly lower hardness of Ceramill
Sintron, however, does not have any ef-
fect on the framework and connector de-
sign of the restoration. This means that
Ceramill Sintron restorations have the
same dimensions and design as usual.
The author is of the opinion that the
good polishing properties of Ceramill
Sintron are also due to the finer grain size
of the alloy particles. On average they are
about forty times (!) smaller than the
grain size of a casting alloy. This makes
the metal structure more homogeneous.
There are also no types of inclusions or
contraction cavities as can occasionally
occur with casting alloys.
6
dent
al
dialog
ue
VOLUME 14 06/2013 ©
D I G I TAL DENTAL TECHNOLOGY
dd
SPEC I AL
Fig. 9 to 13
To achieve such
results using Ceramill
Sintron requires a
great deal of effort,
skill and manual
expertise. The oc-
clusal surface was
not polished to a high
lustre but blasted
with glass beads –
as this article was
intended to show
what could be pro-
duced from a CrCo
occlusal surface for
demonstration pur-
poses
10
11
12
9
13
1,2,3,4 6,7
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