cadera / hip - Active Congress.......

VIERNES / FRIDAY
254
shallow patellar groove and wide intercondylar
notch. Those with deeper patellar grooves
and supporting lateral fl ange surfaces had
low contact stress similar to that of the normal
patellofemoral joint. This suggests that the
variation in the reported clinical results of not
resurfacing the patella could be explained
by the differences in design features of the
femoral component.
A clinical and laboratory study was done to
test the hypothesis that reported differences
in clinical results of unresurfaced patellae
in total knee arthroplasty are due to differences
in design of the femoral component.
Thirty-eight knees had an Ortholoc II femoral
component (shallow patellar groove, wide
intercondylar notch, and fl at femoral surface).
Thirteen knees had severe and three
had moderate anterior knee pain. Fifteen
required patellar resurfacing later. Two hundred
twenty-two knees had Advantim femoral
components (deepened and extended
patellar groove, narrow intercondylar notch,
and rounded femoral surfaces). None of
these knees had severe anterior knee pain.
Eighteen percent had mild anterior knee pain
on stairs postoperatively. Three hundred
thirty knees had Profi x femoral components
(deepened and extended patellar groove,
rounded femoral surfaces, and extended
lateral patellar support). Ten percent of Profi x
knees had mild anterior knee pain. This rate
was statistically signifi cantly less than that of
the knees with Advantim femoral components
(p