POSTER ABSTRACTS - ISAKOS

was not sufficient and in 2 other knees the bone
block was broken. Femoral insertion of the graft
was judged anatomic in 23 cases and acceptable
in 4 cases.Tibial tunnels were easy to perform and
provided satisfactory placements and directions in
all cases. Clinical examination was satisfactory in
27 achieved procedures.
Conclusions: The four tunnels with U femoral
fixation technique permits a safe and solid U
fixation on the femoral side, an anatomic doublebundle
reconstruction of the ACL and an
independent tensioning of the anteromedial and
posterolateral bundle. This procedure provides an
economical and easy way to achieve an anatomic
double-bundle ACL reconstruction with a
satisfactory primary stability. It must be evaluated
by a biomechanical study.
E-poster #408
ACL Hamstring Reconstruction. Comparison of
Three Types of Tibial Fixation Devices
Fernando E Barclay, Pilar, Buenos Aires
ARGENTINA, Presenter
Santiago Butler, Buenos Aires, ARGENTINA
Jorge Cavallo, Buenos Aires ARGENTINA
Pablo Lacroze, Buenos Aires, ARGENTINA
IADT, Buenos Aires, ARGENTINA
Background:
Surgical reconstruction of the ACL is frequently
performed with a quadrupled hamstring graft.
Tibial fixation of this graft has been identified as
the weak link of the construct.
Objective:
The purpose of this study is to retrospectively
evaluate three different tibial fixation devices, and
its influence in the clinical outcome.
Method:
Sixty patients underwent ACL recostruction with
cuadrupled hamstring graft. Femoral fixation with
a titanium crosspin device (Transfix-Arthrex) was
performed in all knees. Three different types of
tibial fixation were used.
Group A (20 patients, 7 female and 13 male, mean
age 28.2 years +/- 8.4) were fixed with a 10mm x
35mm bioabsorbable interference screw (Delta
Screw- Arthrex).
In group B (19 patients, 11 female and 8 male,
mean age 29.6 +/- 10.2) a 9mm x 28mm
bioabsorbable interference screw (Arthrex)plus a
staple as backup fixation was used.
In Group C (21 patients, 6 female and 15 male,
mean age 28.5 +/- 8.7) tibial fixation was
performed with a 25mm x 9mm round threaded
titanium interference screw plus a staple.
All patients were operated by the same surgical
team (a compaction drilling technique was used
for the tibial tunnel) and followed the same
rehabilitation program.
They were evaluated using Lysholm score,
lachman test, anterior drawer test, pivot shift test ,
KT1000 arthrometric testing.
Results:
All sixty patients were available for evaluation at a
mean follow up of 24 months.
The results revealed no statistically significant
differences with respect to clinical or
instrumented laxity testing between the three
groups.
Conclusions:
The different fixation systems of this study do not
influence the late results of ACL reconstructions.
E-poster #409
Anatomical Description of the Anterior Cruciate
Ligament Attachment with Respect to the
Anteromedial and Posterolateral Bundles. Part
2: Femoral Footprint
Andrew Edwards, London, UNITED KINGDOM,
Presenter
Andrew A Amis, London, UNITED KINGDOM
Anthony MJ Bull, London, UNITED KINGDOM
Imperial College, London, UNITED KINGDOM
The aim of this study was to describe the
anatomical locations of the femoral attachment of
the anterior cruciate ligament with respect to its
anteromedial and posterolateral bundles. 22
human cadaver knees with intact anterior cruciate
ligaments were included in the study. The femoral
insertions of the two bundles were identified and
marked. Digital photographs were then taken and
these images were transferred onto computer
documents. Measurements of the attachments
were taken with respect to their o’clock positions
parallel to the femoral long axis and parallel to
the femoral intercondylar roof. The centres of the
bundles were measured in a high-low and a
superficial-deep manner referencing from the
centre of the posterior femoral condyle, and with
respect to their positions within a quadrant
described for this study. The results showed the
bulk of the anteromedial bundle occurred
between the 11.30 and 9.30 o’clock positions and
the posterolateral bundle between the 10 and 8.30
o’clock positions. Also the anteromedial bundle
was found in zones 1 and 2 (20 out of 22) of the