POSTER ABSTRACTS - ISAKOS

We have observed with the software autocad R 14
double outline on the external patellar facet on
the preoperatory digital photos which is corrected
or attenuated in most cases on postoperative x-
ray standard. The results allow us to accept the
hypothesis that the patella not only would turn
around its lognitudinal axis in 3D but it would do
it on its tranversal and anteroposterior axes as
well considering that the retinaculum retraccion
would not be uniform from proxmal to distal,
another inference from this study would affirm
that this sign vanishing in the postoperatory
would make it sure that the full cut was complete
in length and thickness.
E-poster #604
Analysis of the Kinetics and Kinematics
Parameters of Gait and Running in Subjects
with Rupture and Reconstruction of the
Posterior Cruciate Ligament
Wagner Monteiro, Sao Paulo, BRAZIL,
Francisco Marcelo Ribeiro, Sao Paulo, BRAZIL
Carlos Alberto Cury Faustino, Sao Paulo, BRAZIL
Wilson Mello Alves, Sao Paulo, BRAZIL, presenter
Charli Tortoza, Rio Claro, Sao Paulo, BRAZIL
Andre Polli Fujita, Sao Paulo, BRAZIL
Ismael Fernando de Carvalho Fatarelli Campinas,
Sao Paulo, BRAZIL
Universidade do Vale do Paraba, Sao Paulo,
BRAZIL
INTRODUCTION: During the gait and running, the
ligaments present a viscoelastic behavior,
restricting translational and rotational
movements between bone structures. The
Posterior Cruciate Ligament (PCL) is the major
restrictor of the posterior translation of the tibia
in relation to femur. As well as other structures,
the PCL also has an important sensorial role, thus
its rupture, in many cases can cause articular
instability and modify the motor control. This
study shows the variable of kinetic and kinematic
analysis related to the vertical component of the
resultant ground reaction force (VCRGRF) in
individuals with rupture and reconstruction of the
PCL, during the gait, in different inclinations and
running without inclination.
METHODS: Fifteen adult volunteers were
analyzed, divided in 3 (three) groups. The first
group was the control group (n=05); the second
group consisted of individuals with rupture of the
PCL (n=05), and the third group consisted of
individuals who had suffered the PCL
reconstruction surgery. The surgical technique
used was to introduce a graft of one third of the
central-medium patelar ligament and a doubletendon
graft of the semitendinous and gracilis
muscle, and with a postoperative time with a
minimum of 24 months (n=05). For the
quantification and analysis of the VCRGRF, an
instrumented Gaitway„¢ system treadmill with a
system of force platforms with piezoeletric
sensors made by Kistler Inc. was used. The data
had been collected in the frequency of 1000 Hz,
during ten seconds, with one minute of interval
between each data selection.
The referring results to the kinetic and kinematic
analysis were normalized respectively, for the
corporal weight (in Newtons), time between each
stride (in seconds) and height of each individual
(in cm).
RESULTS: With the values obtained during the
gait without inclination, the limbs with rupture of
the PCL, presented an increase of the weight
acceptance rate and a reduction in the impulse,
when compared to the values of the control group.
It shows that individuals with injury of the PCL,
tend to prevent discharges of the corporal forces
in the ground during most part of the phase that
the leg is in touch with the ground. During
running without inclination, the individuals with
rupture of the PCL, presented a reduction of the
stride length, step length and a reduction in
the impulse. They also presented an increase of
contact time compared to the
control group. Individuals with PCL reconstruction
also presented a
reduction in step length. However, for the gait
with inclination,
significant alterations were not observed.
DISCUSSION AND CONCLUSION: It is possible
that the results found can be associated to
inibitory mechanisms of activation of extensor
and flexor muscles of the hip and knee. These
mechanisms can be modified in consequence of
neuro-sensorial deficits and viscoelastic deficits
due to the rupture of the PCL, as well as for
possible adaptations in the motor control system
in inferior limbs, during the gait and running.
E-poster #606
Outcome of Extensor Re-alignment for
Patellofemoral Dysfunction
Ian J Henderson, East Melbourne, VIC
AUSTRALIA, Presenter
Ramces Francisco, Manila, PHILIPPINES
St Vincents & Mercy Private Hospital, Melbourne,
Victoria, AUSTRALIA