Page 15 - KNEETA

KNEETA® Medial-Pivot Total Tibial Tray Component

Keel Size 1 Size 6

Proportional increase with sizes.
The tibial stem of the KNEETA® Medial-Pivot Total Knee System has been made
increasing proportional with the size. This allows for easier insertion for the
smaller components of the range.
35mm

50mm

Built-In Posterior Slope
Posterior
Stem and keel incorporate 3° posterior slope.
The KNEETA® Medial-Pivot Total tibial base keels are angled 3° posteriorly. This 6mm
ensures that even if posterior slope is resected on the proximal tibia the keel is
oriented properly down the cortex of the tibia. The thickness of the tibial base 4mm
implant is 4mm. This number correlates to the thickness of the selected tibial
insert thickness.
For instance, if a 10mm thick insert is selected, the actual thickness of the
bearing surface is 6mm. The 10mm thickness read on the label is actually a
combination of the insert base thickness and the bearing surface thickness.

The KNEETA® Medial-Pivot Total tibial inserts have 0° slope build into the implant:
the articular surface is parallel to the bottom of the insert.

3° Posterior Slope

REFERENCES
1. Pinskerova et al “The shapes and relative movements of the femur and tibia in the unloaded cadaveric knee: a study using MRI as an anatomic tool” JBJS 82-B, (2000)
2.
3. Anderson et al “Patellofemoral complications after posterior-stabilized total knee arthroplasty” JoA 17, 4, 2002.
4.
5. Kujala, U.M., Österman, K., Lormano, M., Nelimarkka, O., Hurme, M., Taimela, S.: Patellofemoral relationships in recurrent patellar dislocation. The Journal of Bone and Joint Surgery
71B: 788, 1989.
6.
7. Karachalios T. A mid-term clinical outcome study of the KNEETA® Medial -Pivot Total Knee arthroplasty. The Knee, 2009; 16(6): 484-8.
8. 2010 Danish Knee Arthroplasty Register.
9. Feinstein WK. Anatomic alignment of the patella groove. Clin Orthop Relat Res. 1996; 331:64-73.
10. Lee TQ. Component positioning in total knee arthroplasty. Clin Orthop Relat Res. 1999;336:274-81.
11. Stiehl JB. Kinematics of the patellofemoral joint in total knee arthroplasty. J Arthroplasty. 2001;16(6):706-14.
12. Schmidt R, Komistek RD, Blaha JD, Maloney JW Fluoroscopic analyses of cruciate-retaining and medial-Pivot Total knee implants Clin Orthop Relat Res. 2003 May;(410):139-47.
13. WMT Internal Data.
14. Shakespeare D. Flexion after total knee replacement. A comparison between the Medial-Pivot Total knee and a posterior stabilised implant. Knee. 2006 Oct;13(5):371-3. Epub 2006 Jul 7
15. MicroPort Orthopedics Engineering Report, ER97-0059

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