Natural-Knee® II Unicompartmental Knee System

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, and provide excellent anatomic realignment, all achieved with state-of-the-art instrumentation.

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.  Both porous ( CSTi™ porous coating) and nonporous (grit-blasted) coatings are available.

Natural-Knee II Unicompartmental Knee Implant

Unicompartmental – A Proven Concept

Because of the high level of patient satisfaction, UKA has become an attractive alternative for patients with Unicompartmental, noninflammatory arthritis.  Recent reports have shown comparable durability and clinical results between UKA and TKA.¹

Surgeon-friendly MIS™ Instrumentation

The MIS instrumentation for the Natural-Knee II Unicompartmental System provides a step-by-step surgical technique with measured and captured resections that avoids the obstacles of some Unicompartmental knee instrumentation systems.

MIS Advantages/Disadvantages

The MIS instruments enable the implantation of Natural-Knee II Unicompartmental implants through a 3-inch incision.  The MIS technique avoids patella eversion and reduces disruption of soft tissue and quadriceps.  Some of the benefits of minimally invasive surgery are:

  • Earlier mobilization
  • Less pain
  • Reduced length of hospital stay
  • Smaller incision
  • Less blood loss

However, MIS techniques also have a longer operating time.


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References

  1. Engh, Gerard. Can We Justify Unicondylar Arthroplasty as a Temporizing Procedure? In the Affirmative. The Journal of Arthroplasty, Vol. 17 No. 4, Supply 1; 2002.