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| Pin
Screw Instructions
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Benefits:
- Easy Technique
- Horizontal Application eliminates gradual unthreading
- Esthethic--no screw on occlusal
- Forces are on the screw, not the threads
Pin Screw
Component/Kit Listing
Instructions
A set or locking screw
for dentist removable crown(s), bridges, or removable prosthesis over implant suprastructures
or telescopic castings. The Pin Screw is
primarily utilized horizontally for telescopic dentist removable prosthesis.
1. Select either the
1.4mm Ø or 1.6mm
Ø diameter Pin Screw.
The 1.4mm Ø
is recommended because corrections are easy by converting to the 1.6mm
Ø pin
screw.
2. The primary
crown/coping is waxed, cast, and finished.
Send out for try in and pick up in a new master impression.
3. The primary
crown/coping is lubricated and the secondary or removable crown is waxed.
When the secondary crown is to be porcelain fused to metal or resin to metal, be
sure that the area where the Pin Screw is positioned is metal--not
porcelain or resin. Minimum wall thickness should be 2.0mm.
Cast the secondary crown in a
precious or semi-precious alloy. Non-precious alloys are too hard for
cutting the channel and tapping the threads. Finish the secondary crown.
| 4.
Select the proper size center bur. Use the 1.20mm diameter bur for the
1.40mm Pin Screw, and use the 1.40mm diameter bur for the 1.60mm Pin Screw.
Select and indent the
position for the Pin Screw (FIG 1).
DO NOT attempt to
dimple the primary crown at this time.
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| 5. Select the same
size twist drill as center bur and refine the channel. Cut the channel
in the secondary crown. Angle the channel slightly upward (FIG
2). Seat the secondary crown on the primary
crown/coping. Use the 1.0mm centering bur to cut a dimple or recess in
the primary crown (FIG 3). |
| 6. Select the 1.40mm thread cutter
for the 1.40mm Pin Screw, or the 1.60mm thread cutter for the 1.60mm Pin
Screw. Put the thread cutter in the socket key and carefully cut the
threads in the secondary crown by hand (FIG 4).
Never attempt to use the thread cutter in a hand
piece. |
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| 7. Use the screwdriver
to thread the Pin Screw through the secondary crown and into the dimple or
recess in the primary crown (FIG 5). Carefully
cut off the excess length of the Pin Screw and rubber wheel into the contour
of the secondary crown. Be sure to leave an adequate slot for the
screwdriver (FIG 6). |
T0022.REV.00
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