89
W
orld Pr
ec
ision Instruments
Orthopedic Instruments/External Fixation
Positive (Raised) Threaded
External Fixation Pins.
Positive or raised thread pins have
threads extending above the smooth
shaft on a portion of the pin. The
positive threaded pins have a tougher
pull-out resistance and are the external
fixation pins used almost exclusively in
human orthopedics.
There are two choices of pin styles and
three different sizes.
1. Threaded portion is in mid-shaft
2. Threaded portion is at the end of
the pin
These pins work with all standard
veterinary external fixation clamps.
All pins are 316LVM implant quality
stainless.
Pearson Raised Thread Pins. Smooth-shank pins
have poor resistance to pull out. Negative-thread
pins are weak. Positive or raised thread pins offer
strength and good pull-out resistance. The Pearson
pin addresses three major problems associated with
the use of threaded pins:
1. Threads are proud of the shank, eliminating
the point of weakness found at the thread-shank
interface of negative-thread pins.
2. Existing self-tapping pins impact bone debris
at the bone pin interface, causing necrosis and
microfractures. The Pearson pin has a unique flute
form that collects bone debris as it is formed,
minimizing damage to the bone-pin interface.
3. Trocar tipped pins cause thermal necrosis if
inserted without pre-drilling. Pre-drilling takes
time and causes soft tissue damage. The Pearson
pin incorporates a unique drill point designed for
minimal "skate" on the bone surface. The pin pre-
drills its own pilot hole.
New Oversized Pins for Large Animal Use.
They have a ¼" shaft, with the raised thread diameter of
3
/
16
". Their use
with an extra-large KE clamp and connecting bar will work on a large
animal fracture. Alternatively, a trans-fixation cast can be applied over the
pins after fracture alignment.
The Pearson pin is available in
1
/
8
",
5
/
32
", and
1
/
4
" shanks, with either
end-thread or mid-thread.
Laceration Kit
5 PIECES
World Precision Instruments
www.wpiinc.com
UK: Tel: +44 (0)1462 424700 · wpiuk@wpi-europe.com Germany: Tel: +49 (0)30-6188845 · wpide@wpi-europe.com US: Tel: 941-371-1003 · sales@wpiinc.com
World Precision Instruments
www.wpiinc.com
UK: Tel: +44 (0)1462 424700 · wpiuk@wpi-europe.com Germany: Tel: +49 (0)30-6188845 · wpide@wpi-europe.com US: Tel: 941-371-1003 · sales@wpiinc.com
503590
Mid-Thread Pin.
5
/
32
" shank
5"L.
503591
Mid-Thread Pin.
5
/
32
" shank
6"L.
503592
End-Thread Pin.
5
/
32
" shank
5"L.
503593
End-Thread Pin.
5
/
32
" shank
6"L.
Mid-Shaft Positive Threaded Pins
Size
Shaft
Thread
Thread Part
Total
Thread Pitch
Price
503584
Small
3
/
32
" dia.
1
/
8
" dia.
3
/
4
"L
4"L
0.9mm
503585
Medium
1
/
8
" dia.
5
/
32
" dia.
1
1
/
4
"L
5"L
0.9mm
503586
Large
5
/
32
" dia.
3
/
16
" dia.
1
1
/
2
"L
6"L
0.9mm
Positive Threaded Portion at End of Pin
Size
Shaft
Thread
Thread Part
Total
Thread Pitch
Price
503587
Small
3
/
32
" dia.
1
/
8
" dia.
1"L
4"L
0.9mm
503588
Medium
1
/
8
" dia.
5
/
32
" dia.
1
1
/
4
"L
4
1
/
2
"L
0.9mm
503589
Large
5
/
32
" dia.
3
/
16
" dia.
1
1
/
2
"L
6"L
0.9mm
503594 Mid-Thread
Pin
1
/
4
" shank
11"L.
503595 End-Thread
Pin
1
/
4
" shank
11"L.
504195 Laceration
Kit
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