S2 Femoral Nail Compression Operative Technique - Stryker

Introduction & Features
Implant Features
Over the past decades antegrade
femoral nailing has become the treatment
of choice for most femoral shaft
fractures. The option of dynamic
and apposition/compression locking
modes has expanded the use of
intramedullary nails.
Stryker Osteosynthesis has created a
new generation locking nail system,
that brings together the benefits and
capabilities of past nailing systems
to create a single, integrated surgical
resource for the fixation of femoral
fractures.
The S2 Femoral Nail, Compression
combines static, dynamic and apposition/compression
locking mode
options.
Furthermore, the S2 Femoral Nail,
Compression offers the competitive
advantages of:
• Using the same nail for left
or right side
• Accommodating reamed
or unreamed procedures
• Providing a Distal Guided
Locking option (with the
S2 Distal Targeting Device)
Through the development of a common,
streamlined and intuitive surgical
approach, both in principle and in
detail, the S2 Femoral Compression
Nailing System offers significantly
increased speed and functionality for
the treatment of fractures as well as
simplifying the training requirements
for all personnel involved.
The S2 Femoral Nail, Compression
is the realization of superior biomechanical
intramedullary stabilization
using small calibre, strong, cannulated
implants for the fixation of the Femur.
Various locking modes can be
chosen according to the fracture
type. In addition to static locking,
a controlled dynamization with
rotational stability is optional.
For some indications, a controlled
apposition/compression of bone
fragments can be applied by introducing
a Compression Screw through
the proximal end of the nail. The
Compression Screw is pushed against
the Partially Threaded Locking
Screw (Shaft Screw) which has been
positioned in the oblong hole, drawing
either the distal or the proximal
segment towards the fracture site.
In stable fractures, this has the biomechanical
advantage of creating active
circumferential compression to the
fracture site, transferring axial load
to the bone and reducing the function
of the nail as a load bearing device (1).
This ability to transfer load back to
the bone can reduce the incidence of
implant failure secondary to fatigue.
Typical statically locked nails function
as load bearing devices, and failure
rates in excess of 20% have been
reported (2).
The beneficial effect of apposition/
compression in treating long-bone
fractures in cases involving transverse
and short oblique fractures that are
axially stable is well documented (3,4).
Common 5mm cortical screws are
designed to simplify the surgical procedure
and promote a minimally invasive
approach.
• Fully Threaded Locking Screws are
available for regular locking procedures.
• Partially Threaded Locking Screws
(Shaft Screws) are designed if apposition/compression
is applied.
A Compression Screw is designed to
close the fracture site.
End Caps are available in various sizes
to provide an improved fit for every
indication and prevent bony or soft
tissue ingrowth into the proximal
threads of the nail.
All implants of the S2 Femoral
Compression Nailing System are
made of Stainless Steel (316LVM).
The S2 Femoral Nails, Compression
are cannulated, not slotted and have a
fluted profile for an optimal bending
stiffness.
In addition, two longitudinal grooves
(one on each side of the nail), between
the 2 M/L Distal Locking Holes,
are designed for the Distal Guided
Locking Mode technique (via S2 Distal
Targeting Device). The main principle
of this technique is based on easy nail
detection with a Probe inserted into
this groove. The groove is used to further
guide the Probe into the Locking
Hole. For detailed information about
Distal Guided Locking Mode technique,
please refer to the S2 Distal
Targeting Device – OP Technique,
REF B1000012.
See the detailed chart on the next
page for design specifications and size
offering.
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