Over 20 Years of Proven Clinical Success. Zimmer Natural-Knee II System

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1 Over 20 Years of Proven Clinical Success Zimmer Natural-Knee II System

2 CSTi Porous Coating Structurally similar to human bone CSTi porous coating combines the excellent biocompatibility of titanium with an optimal structure for bone ingrowth. Manufactured through a proprietary process that sinters commercially pure titanium powder onto a titanium or CoCr substrate. During the process, pores are created. This results in a unique porous coating that has optimally-sized, interconnected pores 2 to allow bone ingrowth and a fine micro-roughness to provide secondary fixation. CSTi porous coating has over 20 years of clinical experience with demonstrated success in both retrieval and long-term clinical studies. Long-term follow-up X-rays and retrieval analysis clearly demonstrate successful fixation and bone ingrowth of CSTi-coated components. We offer CSTi options with several of our product lines including the Natural-Knee II System. Benefits: Excellent biocompatibility of titanium Optimal structure for bone ingrowth Fine micro-roughness for secondary fixation Sintering process results in excellent strength and fatigue properties. Durasul Highly Crosslinked Polyethylene A breakthrough in polyethylene durability Durasul highly crosslinked polyethylene directly addresses the problems of wear and delamination that lead to implant failure. Durasul polyethylene has the potential to extend an implant s durability, providing a long-term solution for joint replacement. Durasul polyethylene was designed and tested to meet the three key standards for successful polyethylene performance in total joint repalcement. Resistance to wear through a strong network of crosslinks. Resistance to aging achieved by the elimination of residual free radicals Mechanical properties suitable for the knee validated by rigorous device-specific testing.

3 Natural-Knee II System Reproducible. Predictable. Results. Since 1985, the Natural-Knee II System has been used successfully to treat over 450,000 patients. Long term clinical results confirm the Natural-Knee II System s design considerations result in improved stability, and promote normal alignment and stable fixation of the implant. The Natural-Knee II System offers a full range of interchangeable, anatomically designed implants, thus allowing for a full range of options for differing patient needs and surgeon philosophies. With over a decade of proven clinical results, the Natural-Knee System inspires trust, confidence and produces results. Pre-op Natural-Knee II Primary System Years of Published Results 1 Post-op Natural-Knee II Primary System Minimally Invasive Surgery Instrumentation for the Natural-Knee II System A goal of the minimally invasive procedure is to offer the patient the potential for a faster recovery than traditional total knee arthroplasty. This procedure reduces disruption of the quadriceps muscle and tendon. Cruciate Retaining System The Natural-Knee II cruciate retaining system closely mirrors the knee s anatomic form to improve function. Our femoral components offer the first truly deepened patella groove to maximize range of motion and minimize patellar complications. Ultracongruent Articulating Surface The Natural-Knee II Ultracongruent Articular Surface provides proven stability in the absence of the posterior cruciate ligament. An intraoperative choice can be made regarding the use of a CR insert, or if the PCL is deficient, an Ultracongruent insert can be used to provide stability. Also, in a revision situation where the PCL has become deficient, a simple exchange of the polyethylene can be made with an Ultracongruent articular surface. No change of a well-fixed femoral component is required.

4 Natural-Knee II Revision and Constrained System Interchangeable and bone conserving, the components in our Natural-Knee II Revision System restore kinematic function, enhance stability, and compensate for bone loss in the revision arthroplasty patient. System modularity and varying levels of constraint give surgeons the intraoperative flexibility to suit a broad range of patient needs and surgical preferences. Natural-Knee II High Tibial Osteotomy System Restores Alignment The Natural-Knee II High Tibial Osteotomy System (HTO ) is specifically designed for young, active patients with varus and valgus deformities. Our HTO System was the first to deliver reproducible results by providing a precise, simple to use, alternative to freehand methods.

5 Natural-Knee II Design Features Deepened patellar groove improves range of motion. The deepened patellar groove design replicates the human anatomy to allow smooth articulation of the patella through full range of motion. Asymmetric design increases coverage of the proximal tibia. Matching this asymmetric shape reduces the problems associated with underfilling or overhanging. Ultracongruent insert provides posterior stabilization without bone sacrifice. This innovative design provides continuous stabilization throughout the range of motion. Natural-Knee II Patello-femoral Joint System A conservative option for younger patients The Patello-femoral Joint (PFJ) System provides targeted resurfacing of the femoral trochlea as an alternative to total knee arthroplasty for patients with arthrosis isolated to the patello-femoral joint. The low profile implant retains the bone stock required for subsequent primary total knee arthroplasty if necessary and articulates with the standard Natural-Knee II patella. The instrumentation helps ensure reproducible results. Natural-Knee II Unicompartmental System Maximum Bone Preservation Reproducible Cuts The Natural-Knee II Unicompartmental System was designed to achieve optimal fixation and even load distribution. Its philosophy is consistent with the rest of the Natural-Knee II family, designed to be bone conserving, provide excellent anatomic realignment and reproducible results. The Natural-Knee II Unicompartmental implants are universally designed, allowing interchangeability medial to lateral and left to right. The slightly rounded femur and tibial insert geometries create a moderately congruent design to help reduce stress and polyethylene wear. Both porous (CSTi porous coating) and non-porous coatings are available. Natural-Knee II CoCr Baseplate The Natural-Knee II Modular Cemented Baseplate is made from cast cobalt chrome and is designed to optimally address the issues and challenges of a cemented baseplate procedure. The baseplate complements the existing family of baseplates and can be used with the primary, revision and CRK (constrained) femoral components as well as all Natural-Knee II tibial insert configurations.

6 1 Hofmann, A. et al.: 10 to 14 year clinical follow-up of the cementless Natural Knee System. Clin Orthop. 2001, 388: Bobyn JD, Pilliar RM, Cameron HU, Weatherby GC. The Optimum Pore Size for the Fixation of Porous-Surfaced Metal Implants by the Ingrowth of Bone. Clin Orthop. 1980, 150: ML Printed in the USA 2005 Zimmer, Contact your Zimmer representative or visit us at

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