Page 20 - KNEETA

One of the most referenced studies on gender sizing was per-
formed by Kirby Hitt, MD. Distal femora were compared to the
2
dimensions of several knee systems (FIGURE 1). It was determined
that most knee components were on average 4.9mm too wide for
the female population. However, this study did not examine other
factors such as patient height.

FIGURE 2 shows the Hitt data incorporated with the dimensions of
several other systems including the KNEETA® Primary, KNEETA®
OPTIMOM®, Zimmer® Gender Solutions™ (GSK), and Stryker® Triath
-
lon® Knees. 2,7

KNEETA - MicroPort Orthopedics
84 KNEETA - OPTIMOM - MicroPort Orthopedics FIGURE 2
Triathlon - Stryker
Vanguard - Biomet
80 NexGen CR Flex - Zimmer
NexGen CR GSK Flex - Zimmer
PFC Sigma - DePuy
76 Journey - Smith+Nephew

72
Femoral M/L 68

64
Hitt et al. 2003 - 209 femurs (female)
60

56

52
40 45 50 55 60 65 70 75 80
Femoral A/P

than the male. Once again, research has found this is not due to gender, but
8 A correlation FIGURE 3 | Anatomic
constant radius of
KNEETA® trochlear
groove.
KNEETA OPTIMOM

normal trochlear groove (FIGURE 3). These features work in conjunction to
reduce stress on the extensor mechanism.

SUNTEK KNEETA R

Medical Devices
and Electronic
Products Trade Co. KNEETA® Medial-Pivot Knee System Total Knee system
20