2
The Apex ® Pin Fixation System is a one step procedure reducing insertion time and reducing insertion temperature.
†
There are three types of fixation pins:
®
The unique One Step Cutting Technology offers significant advantages over traditional pins.
Apex Pins always act as a new drill, so there is no need to pre-drill
Their One Step Insertion and high cutting performance leads to reduced operative time.
Reduced insertion temperatures due to reduced friction.
®
Designed with a smooth non-cutting tip for use in hard cortical bone or for use in zones where a previous fracture may have occurred. Blunt Apex Pins are based on the same technology as One Step Pins, however due to their lack of a drill tip, Blunt
Apex Pins require pre-drilling.
Blunt Apex Pins should be used when better protection of soft tissues is required.
Intended for use in the pelvis.
®
Designed for use in double frames requiring a high degree
of stability.
®
Designed for use in metaphyseal / epiphyseal areas i.e. in cancellous areas to ensure a higher pin stability and therefore a higher frame stability. Note that Cancellous Apex Pins require pre-drilling.
®
Titanium Apex Pins offer the same One Step Cutting
Technology as the self drilling / self tapping pins i.e.:
Titanium Apex Pins always act as a new drill, so there is no need to pre-drill
One Step Insertion and high cutting performance leads to reduced operative time
Reduced insertion temperatures due to reduced friction
Titanium alloy Ti6Al-4V offers an excellent biocompatibility and is particularly recommended for patients
Requiring MRI or CT scans since titanium alloy reduces image distortions
Allergic to nickel contained in Stainless Steel
Titanium alloy Ti6Al-4V has been chosen for titanium Apex
Pins due to
Its hardness which is equivalent to 316L Stainless Steel
(37 HRC) and superior to pure titanium (17 HRC) whose pin tip may be damaged during insertion
Its greater resistance to fatigue than pure titanium
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4
The Apex ® Pin Fixation System uses an advanced cylindrical thread profile that is designed to improve anchorage and pull-out resistance.
Apex One Step Pins have a tip design, that provides optimal cutting conditions during the drilling phase.
A U-shaped thread increases contact with the bone by over 30% and optimises the stress distribution in the bone by reducing radial cortical tension.
A unique double helical flute creates homogenous thread profiles and evacuates bone chips to the rear.
These design features have significantly reduced insertion time and temperature, and have improved anchorage conditions. The axial force and the torque required to insert the pins have also been significantly reduced.
†
U-shaped thread
Self-tapping section
Self-drilling tip
Act as a drill bit and a screw simultaneously.
Allow an accurate drilling of the second cortex.
Minimise cortical protrusion due to a shorter tip point which reduces soft tissue damage.
Reduce insertion moments due to improved cutting parameters.
Reduce insertion temperature to below 50°C.
Reduce operative time due to their one step procedure.
Improve the cutting of the thread due to a better evacuation of bone chips through a unique double helical flute.
Reduce risk of cortical damage due to uniform stress distribution.
50
C
Provide improved anchorage
Improve frame stability
Reduce risk of infection
Improve fatigue and pull out resistance
Positive cutting angle improves cortical contact
5
Conical design may lead to loosening
The advanced cutting technology combined with the advanced design of the tip of the pin allows high cutting performances with an optimal bone debris removal.
This combination provides a positive influence on the following parameters which are of vital importance for pin stability:
Lower insertion forces
Lower friction between bone and metal during pin insertion
Lower insertion temperature
Lower rate of bone necrosis
Higher pin stability
Pin stability is vital to the success of external fixation because, whatever the external fixation components and whatever the frame constructions, if the pin stability is not good a stable frame construction cannot be reached.
Conical Design Looks OK in Theory, But…
Need for pre-drilling means two step insertion procedure.
High pressure on bone during insertion and increased risk of thermal necrosis during the pre-drilling phase.
Risk of loosening due to the conical design.
Impossible to back-up the pin if the tip protrudes too far.
Radial compression may lead to cortical damage
6
In external fixation the global stiffness, stability and elasticity of frames is strongly influenced by the configuration i.e. the number of rods, pin placement, pin diameter and the number of pins.
A bigger distance between pins induces a higher frame stability i.e. it is recommended to place the pins in the extreme holes of the clamps when it is possible.
The choice of pin diameter should be determined by taking into account all the following parameters:
Stability
Anatomical location
Rigidity / elasticity
Size of bone
Soft tissues
When comparing axial frame stiffness a 1mm increase in pin diameter will approximately double frame stiffness.
However, as a general rule, we can consider that:
Minimum pin shaft diameter = Cortical bone thickness / 2
The number of pins is dependent on
Efforts on the frame (lengthening)
The frame stiffness to be reached
By adding pins, the frame stiffness will be increased.
Drill sleeves are imperative in order to protect soft tissues.
Don’t tap the trocar. Turn anticlockwise for a few turns to create an insertion point and then proceed clockwise.
Drill sleeves can be utilised together with the clamps or with the insertion guide.
®
Apex ® Pins have an integrated safety feature to reduce potential breakage of the pin tip. Apex Pins must be used with a Stryker ® Trauma drill brace to effect this feature.
Increased drilling sensitivity.
Better feeling of the second cortex.
Pin Biomechanics
The effect of pin diameter on axial frame stiffness.
†
N/m 10 -3
2’000
1,675.4
2’000
860.0
2’000
364.8
2’000
2’000
Integrated safety feature reduces potential tip breakage under high insertion forces
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8
®
®
Stryker ® Trauma Components
Hoffmann ® II pin to rod coupling (4920-1-020)
Stryker ® Trauma Apex ® Pin Shaft Diameters
Ø 4mm
Ø 5mm
Hoffmann ® II pin clamp (4920-2-020)
Hoffmann ® II Compact ™ pin to rod coupling (4940-1-020)
Ø 4mm
Ø 5mm
Ø 6mm
Ø 3mm
Ø 4mm
Hoffmann ® II Compact ™ clamp (4940-2-020)
Hoffmann ® II Compact ™ peri-articular clamp (4940-2-200)
Ø 3mm
Ø 4mm
Ø 3mm
Triax ™ pin clamp red (5150-3-075)
Triax ™ pin clamp blue (5150-3-070)
Triax ™ pin clamp yellow (5150-3-065)
Triax ™ single pin clamp red (5150-3-175)
Triax ™ single pin clamp blue (5150-3-170)
Triax ™ single pin clamp yellow (5150-3-165)
Tenxor ™ pin post (4936-2-030)
Ø 5mm
Ø 6mm
Ø 4mm
Ø 5mm
Ø 3mm
Ø 4mm
Ø 5mm
Ø 6mm
Ø 4mm
Ø 5mm
Ø 3mm
Ø 4mm
Ø 4mm
Ø 5mm
Ø 6mm
®
Blunt
5036-2-060
5036-1-080
5036-1-580
5036-2-080
5036-1-110
5036-2-110
5027-1-090
5027-2-090
5027-3-090
5027-3-120
5027-4-120
5027-4-150
5027-5-150
5027-4-180
5027-5-180
5018-3-120
5018-5-120
5018-5-150
5018-6-150
5018-6-180
5018-8-180
5018-5-200
5018-6-200
5018-5-250
5018-7-250
5021-7-150
5021-6-180
5021-8-200
5021-8-250
Cat No.
Dimensions (mm)
Shaft & Thread Total
Diameter Length
Products
Self Drilling/Self Tapping
5038-5-060
5038-1-080
5038-2-080
5038-5-080
5038-1-110
5038-2-110
5023-1-090
5023-2-090
5023-3-090
5023-3-120
5023-5-120
5023-5-150
5023-6-150
5023-4-180
5023-6-180
4
4
4
4
4
4
4
4
4
3
3
3
3
3
3
90
90
90
120
120
150
150
180
180
60
80
80
80
110
110
Thread
Length
5
5
5
5
5
5
5
5
5
5
6
6
6
6
120
120
150
150
180
180
200
200
250
250
150
180
200
250
Cat No.
50
60
70
80
20
10
25
10
10
15
50
60
50
70
35
40
50
40
50
10
20
30
30
TITANIUM
30
35
50
60
5016-5-111
40 5016-5-117
50 5016-5-118
5016-5-122
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
60
80
80
80
110
110
90
90
90
120
120
150
150
180
180
10
10
15
20
10
25
35
40
50
40
50
10
20
30
30
9
10
®
Cat No.
Blunt continuation
5020-3-120
5020-6-120
5020-3-150
5020-7-150
5020-7-180
5020-8-180
5020-7-200
5020-6-200
5020-7-250
5020-8-250
5019-7-150
5019-6-180
5019-8-200
5019-8-250
Dimensions (mm)
Shaft & Thread
Diameter
Total
Length
Thread
Length
5
5
5
5
5
5
5
5
5
5
6
6
6
6
120
120
150
150
180
180
200
200
250
250
150
180
200
250
50
50
60
50
60
50
70
30
35
40
50
60
70
80
Cat No.
Products
Cancellous
5015-3-120
5015-4-150
5015-5-150
5015-6-180
5015-7-250
Shaft
Diameter
5
5
5
5
5
Transfixing
5030-3-200
5030-4-200
5030-5-200
5030-3-250
5030-4-250
5030-5-250
5030-6-250
5030-4-300
5030-5-300
5030-7-300
4
4
4
4
4
4
4
4
4
4
Dimensions (mm)
Thread
Diameter
Total
Length
5
5
5
5
5
5
5
5
5
5
6
6
6
6
6
120
150
150
180
250
200
200
200
250
250
250
250
300
300
300
Thread
Length
35
40
50
60
70
35
40
50
60
35
40
50
40
50
70
Catalogue Description
Number
5057-0-100 Apex ® Drill Guide Assembly
5057-0-200 Drill Brace Assembly for 3mm/4mm/5mm/6mm Apex ® Pins
5057-3-100
5057-3-200
5057-4-100
5057-4-200
5057-5-100
5057-5-200
5057-6-100
5057-6-200
3mm Predrilling Assembly-Short
3mm Predrilling Assembly-Long
4mm Predrilling Assembly-Short
4mm Predrilling Assembly-Long
5mm Predrilling Assembly-Short
5mm Predrilling Assembly-Long
6mm Predrilling Assembly-Short
6mm Predrilling Assembly-Long
5085-1-222
5085-2-032
5085-2-040
5085-2-045
5057-9-900
Drill 2.2mm for 3mm pins
Drill 3.2mm for 4mm pins
Drill 4.0mm for 5mm pins
Drill 4.5mm for 6mm pins
Apex ® Pins and Instrumentation Storage and Sterilisation Tray
Stryker ® , Hoffmann ® II, Monotube ® , Apex are trademarks of Stryker Corporation.
® , Tenxor™, Compact™ and Triax™
Hoffmann ® II Swiss Patent Application: 01-709/94-3. Other Patents Pending. * Patents: EU 385,929; 374,093;
Canada 1,193,506; U.S. 5,160,335 and 5,207,676. ** Swiss Patent Application: 02-709/94-3. Other Patents Pending.
*** Patents: EU 190,990; U.S. 4,784,125; 5,095,919. **** Patents: EU 230,856; Swiss CH 671,150; U.S. 4,978,350.
† Data on file at Stryker ® Howmedica Osteonics USA.
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*
Unilateral frame system designed to handle a wide variety of fractures and limb-lengthening applications. This simple, colour-coded system offers both dynamic and carbon tubes for individualised performance and economy. True simplicity, versatility, and economy.
**
Modular frames which allow for true independent pin placement.
Completely compatible with Original Hoffmann ® components, this new system improves flexibility and ease-of-use, while enhancing frame economics through minimal componentry. It’s external fixation with a
“snap.”
Designed to complement the anatomy of the distal radius by allowing independent movement of its clamps in multiple planes. Standard unilateral or bi-lateral bridging frames for intra-articular fractures and peri-articular non-bridging frames for extraarticular fractures. Fully compatible with the Hoffmann ® II System, based on a spring-loaded snap-fit mechanism that improves flexibility and ease-of-use.
The DJD II is a Dynamic Elbow Joint Distractor. Fully compatible with the Hoffmann ® II Compact ™ System, it is designed to treat posttraumatic elbow stiffness as well as acute elbow trauma fractures.
The Tenxor ™ System is a hybrid system providing advanced technology and ease of application. Fully compatible with Hoffmann ®
Monotube ® Triax ™
II and
, based on a spring-loaded, snap-fit mechanism that improves flexibility and ease of use.
****
Every Fixator incorporates the high quality pin-to-bone interface provided by Apex ® Pins. The Apex ® Pin cuts more sharply with less torque, friction and heat upon insertion improving purchase while minimising the risk of pin tract problems.
† Available in self-drilling and blunt tip designs, only from Stryker ® Howmedica Osteonics!
MANUFACTURER: Manufacturing location
5 chemin des Aulx
CH-1228 Plan-les-Ouates
Geneva, Switzerland
Tel: 00 41 22 884 0111
Fax: 00 41 22 884 0199
Cat No: 5075-4-000
© 2001 Stryker Corporation. All rights reserved.
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