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KNEETA R

sliding due to the anterior stability of the ® Medial-Pivot
9
and Knees (FIGURES 4a, 4b). Femoral components with a j-curve Total Knee system
and traditional articulation experience anterior sliding (termed
SIZE A B C
excess stress on the extensor mechanism of the knee.
1 60 52 8
2 – KNEETA OPTIMOM® 60 57 8
2 65 57 8
3 – KNEETA OPTIMOM® 65 62 8
3 70 62 8
4 – KNEETA OPTIMOM® 70 66 8
4 75 66 8
5 80 71 8
6 85 76 9

FIGURE 4a | Anterior slide of j-curve knee contributing
to anterior patellar stresses B
A

C

C

REFERENCES
1. Poilvache PL, Insall JN, Scuderi GR, Font-Rodriguez DE. Rotational landmarks and
sizing of the distal femur in total knee arthroplasty. Clin Orthop Relat Res. 1996
FIGURE 4b | KNEETA® Medial-Pivot Total Knee System exhibits Oct;(331):35-46.
minimal anterior sliding and protects extensor mechanism 2. K Hitt, et al. Anthropometric Measurements of the Human Knee: Correlation to the
by keeping the femur in the posterior one-third of the tibia. Sizing of Current Knee Arthroplasty Systems. JBJS 85:115-122 (2003).
3. Chin KR, Dalury DF, Zurakowski D, Scott RD. Intraoperative measurements of male
KNEETA OPTIMOM® femoral components are designed to and female distal femurs during primary total knee arthroplasty. J Knee Surg. 2002
accommodate those male or female femora with a larger A/P Fall;15(4):213-7.
4. Grelsamer et al. Men and women have similar Q angles: a clinical and trigonometric
evaluation. J Bone Joint Surg Br.2005; 87-B: 1498-1501.
M/L dimension has been reduced by 5mm from the standard 5. Garron E, et al. Anatomic study of the anterior patellar groove in the fetal period Rev
KNEETA Total Knee. The components utilize the KNEETA® 3.6˚ Chir Orthop Reparatrice Appar Mot. 2003 Sep;89(5):407-12.
trochlear groove angle that replicates the sulcus morphology of 6. Glard et al. An anatomical and biometrical study of the femoral trochlear groove in
the human fetus. 2005. J Anat. Apr;206(4):411-3.
both males and females FIGURE 5. This trochlear groove has 7. Goldstein W, et al. Implant Sizing and Female Gender in Total Knee Arthroplasty:
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demonstrated excellent clinical results.
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8. Sulaiman AS, Nordin S. Measurement of patellar thickness in relation to patellar
3.6°
resurfacing. Med J Malaysia. 2005 Jul;60 Suppl C:41-4.
FIGURE 5 | Reduced width of 9. Pritchett JW. Patient preferences in knee prostheses. J Bone and Joint Surgery (BR).
KNEETA OPTIMOM® implant 2004 Sept;(86-B): 979-982.
represented in teal. Features 3.6° 10.
trochlear groove of standard Oct;(331):23-8.
KNEETA Tolal Knee 11. 2010 Danish Knee Arthroplasty Register.

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KNEETA® Medial-Pivot Knee System
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