Page 23 - KNEETA

Conventional knee implants have J-curved femoral components The “ball-in-socket” philosophy is not a new concept to the
based on the four-bar link theory and no stabilizing structures to industry and has been cited to have a 96.9% survivorship rate
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prohibit the femur from sliding forward. FIGURE 3 at ten years.
The medial-pivot design philosophy has been utilized as a design

1994, and has been a fundamental component in the KNEETA®
Knee System design since 1998.

Patients PREFER the “ball-in-socket” design
over conventional CR (76%), Mobile-Bear-
FIGURE 3 | Medial pivot section view of a conventional femoral implant at 0° ing (61%) or PS (76%) TKA designs 5

REFERENCES
component begins sliding forward (“paradoxical motion”). 1. Fehring TK. Early failures in total knee arthroplasty. Clin Orthop Relat Res.
FIGURE 4 2001;392:315-8.
2. Sharkey PF. Why are total knee arthroplasties failing today? Clin Orthop Relat Res.
2002;404:7-13.
3. Callaghan JJ. Why knees fail, lessons learned. J Arthroplasty.2004;19(4):31-4.
4. 2010 Danish Knee Arthroplasty Register
5. Pritchett JW. Patients prefer a bicruciate-retaining or the medial-pivot total knee
prosthesis. J Arthroplasty. 2011;26(2):224-8.

FIGURE 4 | Medial pivot section view of a conventional femoral implant exed at 30°

The KNEETA® Medial-Pivot Total Knee System has been designed

to prevent this anterior sliding or “paradoxical motion.” The femo-

geometry on the medial pivot compartment. FIGURE 5

FIGURE 5

This “ball-in-socket” design provides
consistent
to prevent paradoxical motion.

SUNTEK KNEETA R
Medical Devices
and Electronic Total Knee system
Products Trade Co. KNEETA® Medial-Pivot Knee System
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