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| Preci
Ball Castable Male Instructions
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| Female
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Plastic Burnout Male
Pattern |
Large Tin Spacer |
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| 1201 Mandrel |
Activate/Deactivate
Tool |
1201D
Analogue |
Benefits:
- Economical castable male pattern
- Universal components
- May be used for bar constructions, post and
copings, or cast copings
Fabricating the coping
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1 |
2 |
3 |
| The abutment is prepared for either a
post and coping (the Preci Post
system is recommended), or a cast coping only. Accurate full arch
impressions must be sent to the laboratory. Wax up the post-coping as low as possible (FIG
1). Use the
1201P Paralleling Mandrel
to incorporate the castable sphere into the wax-up and parallel to each
other(FIG 2).
The occlusal surface must be at an angle of 90 degrees to the path of
insertion (FIG 3). |
4 |
5 |
| Invest, sprue, and cast in
the alloy of choice (FIG 4).
Do not sandblast the casting when devesting, as this will leave a
rough surface on the cast sphere. Use the Cup Bur (FIG 5) to finish the cast sphere. This
bur will assure a smooth, spherical shape of the casting. |
Indirect pick-up of female
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6 |
7 |
8 |
| The completed casting is
sent out for try-in. The cast coping(s) should be picked up in a new
impression and a new master model poured for processing the females.
Take an impression with the
male in place (FIG 6). The
1201D
(FIG 7) analogue will index
in the impression exactly where the male is in the mouth.
Pour the model (FIG 8). |
Processing the
Female
| The ball in place in the
mouth, or on a model (FIG 9). Place the large tin spacer (FIG
10) over
the ball and contour the pliable tin spacer around the ball and gingival
area (FIG 11) to pre-relieve the acrylic
from contacting the cast coping.
Be sure to use the big tin spacer. |
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12 |
13 |
| Seat the Preci Ball female over both the ball and both spacers (shown in the mouth and
model, FIG 12 and FIG 13). Use
the 1211 Female
Paralleling Mandrel to assure that the females are parallel. |
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14 |
15 |
| Chairside: The prosthesis is
relieved to allow room for the female component (FIG
14).
Drill a "vent", or small channel in the lingual side of
the prosthesis to allow excess acrylic to escape. Low viscous self-cure resin is applied (FIG
15) to pick up the female. |
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16 |
17 |
| Chairside: The prosthesis is seated in the mouth for approximately 6
minutes with finger pressure only (FIG
16).
Do NOT have the patient bite into place, as this will displace tissue.
The self curing or auto
polymerizing acrylic resin is pressed into the cavity with a finger
covered with vaseline. When the acrylic resin has set, the metal housing is fixed
in the prosthesis (FIG 17). This allows the female to be easily changed. |
T0041.REV.00
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