Internal Hex Pin Screw Instructions

                                                                               

Horizontal screw retention of crowns and bridges in implantology, bars, and telescopic designs.

Benefits:

Pin Screw Component/Kit Listing

Pin Screw 1.6mm

Center Drill

Hexdriver

Screw Tap Holder

for holding screw tap/thread cutter

Twist Drill 1.40

for drilling secondary crown

Thread Cutter (screw tap)

for tapping the secondary crown

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.  The primary crown/coping or bar is waxed,  cast, and finished.  Send out for try in and pick up in a new master impression.

2.  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.

3.  Use the 1.40mm Ø drill to indent the position for the Pin Screw (FIG 1).

DO NOT attempt to dimple the primary crown at this time.

4.  Use the 1.40mm Ø Twist drill to 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 centering drill to cut a dimple or recess in the primary crown (FIG 3).
5.  Put the 1.60mm 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.

6.  Use the hex driver 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 access for the hex driver (FIG 6).

T0022.REV.01