SUPPLEMENTAL
RESISTANCE OPTIONS
Pins
Clinical steps
1. Place countersink with #4 round bur as far away from
the primary retention and resistance area to half the depth
of the bur.
2. Use .024 in or .7 mm twist drill and align to bisect
the draw of the preparation. With a good finger rest and
with coolant move drill up and down until proper depth has
been achieved. If more than one pin hole is placed, the
hand position should remain in the same position in order
that the pins draw.
3. When using a #169 or #170 tapered bur to make a pin hole,
use a #6 round bur for the countersink.
Slots
Clinical steps
1. Using a #169 taper fissure bur, a channel of proper depth
is placed as far away from the primary retention and resistance
area or area to be supported until the proper depth has
been achieved. The slot must draw with the rest of the preparation.
2. Slots can be use instead of pins on posterior teeth.
Pots
Clinical steps
1. Using a Midwest pointed #7404, additional resistance
pits can be places in areas of deep 'block-out' areas. These
pits are retained with the help of the surrounding cementing
medium.
2. The use of the #7404 should not be used to make pot holes
in tooth structure as it removes more tooth structure than
necessary.
Bales
Clinical steps
1. Using a Brasseler #7404, a groove the depth of the bur
is placed from the occlusal extending down between the cusps
on the stronger side toward the gingival. This finger like
extension provides an additional resistance form and reduces
stress on the already weakened wall on the opposing side.
