A small dimple is prepared with the Diatit Center Drill
(#330 006 60) to determine the position of the drill
hole. The dimple will center the drill and keep it in
position.
The hole is drilled with the 1.5mm Diatit Multidrill
(#330 007 30). The dimple is used to guide the drill
into position.
The waxing pins are inserted into the holes to check for
proper positioning.
Gross undercuts are relieved using wax and is carved in
a parallel manner.
Waxing pins are reinserted into the holes and the bar
and pins are lightly coated with petroleum jelly.
Pi-Ku-Plast is applied over the blocked out bar and
waxing pins.
After setting, the Pi-Ku-Plast pattern is gently lifted
off and slightly adjusted with the use of burs or rubber
wheels.
After adjusting, and removal of attachment components,
the pattern is placed over the bar to check the fit. It
is recommended at this time to add some mechanical
retentions such as wax mesh, flat side up.
Additionally, some retentive “tails” can also be added.
The pattern is lifted off, sprued, and invested.
The casting is devested and carefully fit over the bar.
It should have a frictive fit without the attachments in
place.
Once the overcasting is seated, the hole in the bar
should be clearly visible through the housing created by
the Pi-Ku-Plast around the Waxing Pin
Ropak UV opaquer (#520 001 64 & 520 001 65) is used to
mask out the metals color.
Denture teeth are arranged in a typical manner.
The denture is waxed.
Acrylic processing is carried out in the usual manner
and bonding in of the locking pin is done after
finishing and polishing of the prosthesis.
A light coat of petroleum jelly is added to the
non-bonding elements of the attachment.
Bonding cement is mixed and applied into the cylindrical
metal housings.
The locking pin is then inserted into the chrome cobalt
framework.
After the bonding cement has set, the locking pin
attachments are checked for accurate fit and function.
Tissue side view of the locking pin cylinder in the
closed position.
Back to Top
All
measurements are in millimeters.
