well known HORICO DIAMOND ABRASIVES and additional HORICO
DENTAL PRODUCTS are illustrated on the following pages. Since
the HORICO line is so complete, every type and design required
by dentist or technician will be found in the illustrations.
The various grits and their recommended uses are listed below.
extra coarse grit (180µ ) black ring on the shank
Extra coarse FG diamonds are widely used for quick reduction
of tooth substance during crown preparations. Finishing diamonds
(C grit) are needed for smoothing as well as for the final
shaping of the respective preparations. X-coarse midget diamonds
are used for the removal of old fillings. Because of enamel
splintering due to the usage of extra coarse diamonds it is
advisable to finish with a C-grit (50µ) or F-grit (30µ)
extra coarse midgetpoints have been especially developed to
facilitate removal of old crowns. These crown cutters do not
chatter or walk across the crown, a tendency sometimes
noticed when using carbides. These midget points can be used
for as many as 5-10 crowns and afford real economy compared
to other techniques.
coarse grit (135µ ) green ring on the shank
In general, coarse grit instruments may serve the same purpose,
but not quite as efficiently for removing old crowns. Also
with this type of grit enamel splinterings will occur, making
it necessary to employ finishing diamonds (either F-grit or
grit (100-120µ )
After cavity preparations with normal grit diamonds, finishing
is not usually essential. Enamel splintering does not occur
and the surface usually provides excellence adherence for
filling materials such as cement or amalgam. For inlay and
onlay preparations it is advisable to use C and F finishing
diamonds for precise adjustment of the margins.
fine grit (50µ ) red ring on the shank
C finishing diamonds are recommended for finishing preparations
and for pre-smoothing of composite materials with microfillers
as well as for the removal of overhangs.
extra fine grit (30µ ) yellow ring on the shank
F finishing diamonds are used for the finishing of preparations
and for the finishing of composite materials with microfillers.
They are also suitable for precise contouring or for removal
of remaining overhangs.
ultra fine grit (15µ ) violet ring on the shank
The third finishing step for composite materials with microfillers
is completed with the U-grit finishing diamonds. The gloss
accomplished by using the U-grit instruments provides the
surface required for lateral teeth. Advantages can also be
achieved by using a sequence of increasingly finer diamonds
for composite materials with microfillers.
+ F + U
To accomplish an optimal result it is advisable to use our
C-grit (50µ), F-grit (30µ) and U-grit (15µ)
finishing diamonds only whilst applying a slow speed (10,000-15,000
RPM) combined with minimum working pressure and abundant water
cooling. As in other fieldssuch as the finishing of
wood productsit is known that better results are achieved
by a sequence of prefinishing, fine-finishing and polishing
compared to processing material without the intermediate finishing
steps. Following all steps assures the optimal high gloss
desirable for lateral teeth. It will also be found that these
instruments have a very long life.
use of finishing diamond for composite materials with microfiller
is definitely recommended as the microfiller will not be pulled
away from the matrix material-a tendency sometimes occurring
when using tungsten carbide burs or finishing stones.