LEGION

Total Knee System

 

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LEGION Total Knee System

Overview

The LEGION Total Knee System is a comprehensive system designed to allow surgeons to address straightforward primary to complex revision knee arthroplasty. By virtue of it's unique implant design features, proprietary materials and intuitive instrumentation, LEGION empowers surgeons to manage diverse surgical challenges and provide personalized joint care with one system, one company.  

LEGION total knee replacement and revision options include: 

  • GENESIS II Total Knee Replacement
  • LEGION CR Cruciate Retaining Knee Replacement
  • LEGION PS Posterior Stabilized Knee Replacement
  • LEGION RK Revision Knee Replacement
  • LEGION HK Hinge Knee Replacement

    The LEGION family offers a variety of options for both primary and revision total knee replacements. LEGION implants are available with VERILAST Technology, the combination of OXINIUM and XLPE. Addtionally, some of the LEGION prostheses are available for use with our VISIONAIRE, patient matched cutting blocks for total knee replacement surgery.

Download the LEGION product brochure.

For additional information, contact your local sales rep.

Learn more about our Technologies


VERILAST Technology

VISIONAIRE Patient Matched

Endurance

A Legacy of Clinical Success  

There are many factors that ultimately influence implant endurance. Smith & Nephew has been at the forefront of innovation in the area of endurance, as demonstrated through a legacy of success. The design of the LEGION Total Knee System was inspired by the GENESIS II Total Knee System, which has a longstanding record of clinical success. For more than 10 years and in more than 30 countries, the GENESIS II Total Knee System has achieved outstanding clinical outcomes. 1,2,3

  Richard S. Laskin
100 consecutive
Minimum 5 years
Mark A. Snyder
562 consecutive
5-8 years
Robert B. Bourne
843 consecutive
Mean 9.5 years (5-11)
       
ROM 118° mean 118.6° mean 117° mean
Lateral Release Rate 3% 2.5% 4%
Knee Score 93 93.4 n/a
Survivorship 98.2% 98.9% 98%



Wear Resistance

Smith & Nephew has a longstanding reputation for providing surgeons with technologies designed to maximize implant wear resistance. That reputation was built through market leading innovations such as our highly polished tibial baseplates, tibial locking mechanism and the award-winning OXINIUM Oxidized Zirconium. That history of innovation continues with the introduction of the VERILAST Technology. In lab testing, Smith & Nephew demonstrated that the composition of the mating component has a significant influence in the wear resistance of the entire bearing couple (see VERILAST chart 1 below).  

After simulating 3 years of use, the mean volumetric wear of VERILAST couples (2.67 mm3) was approximatley 98% lower than CoCr/CPE couples (120.42mm3).

After simulating 3 years of use, the mean volumetric wear of VERILAST couples (120.42 mm3) was approximatley 81% lower than CoCr/CPE couples (22.78mm3).

Our testing shows that the wear of polyethylene combined with Cobalt Chrome increases under the clinically relevant, abrasive conditions. However, when combined with OXINIUM Oxidized Zirconium, wear resistance is maximized. This result is attributed to the scratch resistance that OXINIUM provides.

Therefore, VERILAST Technology, the combination of OXINIUM Oxidized Zirconium and highly cross-linked polyethylene produces a knee implant system that addresses the need for greater wear resistance. All orthopaedic manufacturers have highly cross-linked polyethylene. Only Smith & Nephew has VERILAST Technology.

Engineered for life

Clinical References
1. Laskin, Richard S., Davis, John, “Total Knee Prosthesis using the GENESIS II Prosthesis: a 5-year follow-up study of the first 100 consecutive patients.”, The Knee 12 2005, pp.163-167.

2. Snyder, Mark, “GENESIS II Total Knee Arthroplasty: 5 to 8 year results”, Smith & Nephew, Inc, 2006

3. Bourne, Robert B., McCalden, Richard W, MacDonald, Steven J, Mokete, Lipalo, Guerin, Jeff, “Influence of Patient Factors on TKA Outcomes at 5 to 11 Years Followup.”, Clinical Orthopaedics & Related Research, November 2007, 464:27-31

4. 2005 Engineering Materials Achievement Award, American Society for Metals, 2005.

Versatility

Move seamlessly from Primary Arthroplasty to Revision and beyond

The LEGION Total Knee System empowers you to address diverse surgical challenges with one A-P Resection, one system and one company such as:

  • Rheumatoid arthritis
  • Post-traumatic arthritis
  • Osteoarthritis
  • Degenerative arthritis in older patients whose age, weight and activity level are compatible with an adequate long-term result
  • Failed osteotomies
  • Unicompartmental replacement or total knee replacement
  • Patients in primary and revision surgery, where the anterior and posterior cruciate ligaments are incompetent and the collateral ligaments remain intact.
  • Patients in primary and revision surgery, where the posterior cruciate ligament and one or both of the collateral ligaments (i.e. medical collateral and/or lateral collateral ligament) are absent or incompetent.

Femoral Components - Cruciate Retaining

Better patella tracking | Lateralized trochlear groove with S-curve at base funnels patella toward midline for better patella tracking in deep flexion Tightly-radiused posterior condyles | Allow for deeper flexion

Femoral Components - Posterior Stabilized

Better patella tracking | Lateralized trochlear groove with S-curve at base funnels patella toward midline for better patella tracking in deep flexion Bone Conserving

 All LEGION Femoral Components share the following features:

  • OXINIUM material and CoCr options
  • Anatomic design
  • Lateralized trochlear groove
  • Common A-P Resection

Femoral Components - Constrained

The LEGION Revision Knees offer a larger selection of components, offsets, augments and stems.
   
   
 

Minimized Bone Resection

The LEGION constrained femoral components were designed with varying anterior chamfer angles to minimize bone resection and maximize the deepened patellar groove. The cam on the constrained femoral component has been positioned closer to the distal surface and more posteriorly resulting in a smaller box requiring less bone removal.

Stronger, Shorter Female Taper

Designed and sized to provide increased strength, the new female taper allows for a larger selection of stem sizes. The new taper has a shorter post compared to the GENESIS II Total Knee System which allows surgeons a better metaphyseal offset fit. The taper also includes a secondary locking mechanism for postoperative security.

Proper Kinematics

The deepened and extended trochlear groove of the LEGION constrained femoral component is the same lateralized design as the LEGION CR and PS - which allows for added patellofemoral contact area and greater subluxation resistance. Posterior condyles are tightly radiused to maximize flexion.

 

Tibial Baseplates

  • Be cause your patients come in different sizes, symmetrical shape provides better tibial coverage; medalized stem aligns with the center of the canal
  • Proven locking mechanism with anterior and posterior dovetail
  • Highly polished baseplate to reduce backside wear
   

Femoral and Tibial Components - Augments, Stems, and Couplers

Screw-on Femoral Augments

  • Distal femoral wedges: 5, 10, and 15mm
  • Posterior femoral wedges: 5 and 10mm
  • L-wedge combinations: 5x5, 10x5,15x5,5x10, 10x10, 15x10mm
  • Composed of Ti-6Al-4V
  All offset couplers/stems can be used on any femoral/tibial component
 

Patella

  • Resurfacing components may be prepared with standard or large reaming instrumentation or resection guides
  • Biconvex component prepared with reaming instrumentation
         

Ease

Having access to a breadth of capabilities with ease. The ability to do more of what matters. That is the essence of this system.

Today's knee implant patients present increasingly diverse scenarios. As a surgeon, you are only certain of your patient's true clinical condition when surgery is underway and all the factors are visible. You have to make decisions fast and you want to get it right the first time. Customize Endurance

Personalize with Versatility

Optimize procedures with ease

That is "Power of Simplicity"

Versatile, Simple instrumentation

The LEGION  Total Knee System includes versatile, simple instrumentation, comprehensive in function and fewer in number. The instrumentation reduces surgical time and simplifies decision-making during the intra-operative procedure. As a result, you are able to achieve excellent alignment and effectively restore joint line position, giving your patients joint care. 1

No other knee system offers a broader range of instrumentation options:

  • Anterior Cut First and Distal Cut First Femoral Instrumentation
  • One A-P Resection
  • Extra and Intramedullary Tibial Instrumentation
  • Familiar approach and soft-tissue friendly instrumentation for MIS surgery
  • Easy, one-step conversion from Cruciate Retaining to Posterior Stabilized

 

LEGION Instrumentation   LEGION Instrumentation


Clinical References

1. Nadaud, M, Snyder, M, Brown, D, McPherron, A, “New Trends and Early Clinical Outcomes With a Modern Knee Revision System”, Innovations in the treatment of the arthritic knee - ORTHO supplement, Aug. 2007, pp. 97-101.

Revision

The LEGION Revision Knee System has been designed to offer the orthopaedic surgeon improved options to deal with the complexities associated with revision knee arthroplasty, while providing them in a manner that is relatively simple to execute. The instrumentation has been developed to be an easy-to-use system that will allow the surgeon to obtain accurate and reproducible results while improving the ease with which a surgeon can manage bone mass, restore limb alignment and improve knee function. Failed total knee arthroplasty due to aseptic loosening, osteolysis, instability, malalignment or infection can be reconstructed using the LEGION Revision Knee System.

Key elements in revision knee arthroplasty include:

  • restoration of proper limb alignment
  • achievement of proper prosthetic component position
  • restoration of knee biomechanics
  • balanced medial/lateral and flexion/extension gaps.

The achievement of these goals will lead to proper patellofemoral mechanics, functional range of motion and optimized patient satisfaction.