A
New Twist in Polishing
It is a
known fact that the best finish for porcelain is a glazed surface.
It is also known that doctors do not generally use glazing ovens.
The alternative is to achieve the smoothest possible finish and
create a glaze-like shine by polishing. CEREC® restorations
or any lab CAD/CAM generated crown provide a unique challenge
for conventional polishing methods due to the extensive amount
of time required to polish an entire crown. Polishing is
performed on small areas where the glaze is broken due to adjustments
on the occlusion or mesial/distal contacts. Rubber points
do a great job for touch-up polishing, but presents difficulty
polishing larger areas. They generate excessive heat and
exhibit additional limitations; narrow polishers produce uneven
surfaces, while aggressive diamond-impregnated finishers can easily
alter critical dimensions. They are also time-consuming.
Premier Dental's unique super-charged Diamond Polishing kits help
the dental office achieve an ultra-lustrous surface while reducing
polishing time by more than half!
Premier
Dental's unique Fibra Points, included in the SCL kit, do not
produce heat, are mildy aggressive for final finishing/pre-polish,
cover a wide surface area for fast and uniform surface treatment,
and are long-lasting. They are part of a new system built
around a unique, super-charged polishing paste. Diamond
Twist SCO™ & SCL™ paste is highly filled with
3-micron diamond particles. Applied with felt or brush applicators,
Diamond Twist produces a glaze-like appearance quickly and easily.
SCL
(Lab) Polishing Technique
For polishing
porcelain crowns and multi-unit bridges or CEREC® restorations
after removal from the milling machine, use the SCL kit components.
The Fibra shapes (gray) contain an embedded abrasive that will
finish and pre-polish the surface. Use the Fibra pre-polishing
tools at slow speeds (15,000-25,000 rpm) on all areas of the crown,
including the occlusal surface, using medium pressure, getting
as much into deep anatomy as possible. A full crown should
take approximately one minute. Load the felt shapes (white)
with a small amount of diamond Twist SCL paste. A final mirror
polish is easily accomplished by using low rpm and touching the
point to the paste. Polish the entire crown with medium
pressure, with special attention to the deep anatomy. Re-apply
paste as necessary. To polish areas of deep anatomy where
the larger points cannot reach, use the RA-shank polishing brush
that comes with the SCO kit. It conveniently fits into the
lab handpiece. A glaze-like shine over the entire crown
should take no more than 2-5 minutes. Use the Fibra wheels
with the Super Grip Mandrel and the Felt Wheels with the Standard
Mandrel.
SCO
(Operatory) Polishing Technique
After the
crown, onlay or inlay has been seated, it may be necessary to
make the occlusal adjustments for proper contact. These
adjustments should be made with a 30-flute bur, micron-finishing
diamond (Premier Two Striper® MFS®) or white stone.
To polish intra-orally after restoration is cemented, use the
SCO components Micro-Cloth disk or Polishing Brush applicators
with Diamond Twist paste.
Twist
Paste Dispensing: To reduce waste and minimize
splatter, place a small amount of paste on a weighted (stationary)
mixing slab. Dab the brush or Micro-Cloth disk into the
paste while rotating at approximately 5,000 rpm, uniformly incorporating
it into the fibers. Polish:
Use brush or disk at low speeds (10,000 rpm-15,000 rpm) with light,
intermittent strokes to minimize heat. Re-apply paste as
necessary. Prior to completion, use feather-like strokes
at 20,000 rpm. Wipe clean with gauze or cotton swab.
Note: brushes can be autoclaved up to 280°F.
When used sequentially, the
SCL lab technique and SCO (operatory) or intra-oral technique
produce faster and better polishing results. For additional
information about Diamond Twist SCL and SCO kits, please call
Premier Customer Service at 888-670-6100 or e-mail dentalinfo@premusa.com. |
