POSTER ABSTRACTS - ISAKOS

Methods. 35 Cadaveric knees were dissected, the
AMB and PLB insertion sites were marked and
measured with a 3D system, as were the cartilage
border on the medial wall of the lateral femoral
condyle and the tibial spines and plateaus.
Positions of the mean centres on femur and tibia
were calculated, relative to landmarks detectable
during arthroscopy.
Results. FEMUR: The mean ACL, AMB and PLB
centers are at 75%±6% of the notch depth (ND).
The ACL is at 72%±9% of the notch height (NH).
The AMB and PLB at 90%±12% NH and 53%±13%
NH.
TIBIA: The mean ACL, AMB and PLB centers are at
36%±9% of the anterior-posterior length of the
anterior intercondylair area. Relative to the
distance between the tibial spines, the ACL is at
37%±13% lateral of the medial spine, the AMB and
PLB at 23%±12% and 55%±13% lateral.
Conclusions. The insertion geometry of the ACL is
well defined from an arthroscopic perspective in
35 cadaveric knees with respect to the AMB and
PLB. With simple guidelines for the surgeon the
centers of the insertions can be found within 1-3
mm.
With these results a femoral aiming device for
anatomic tunnel positioning will be developed.
Supported by the AO Foundation, SWITZERLAND;
Grant 99-W14.
E-poster #386
Motion Analysis of One Legged Vertical Jump in
Anterior Cruciate Ligament Injured Knee
Takayuki Kuroda, Okayama, JAPAN, Presenter
Nobuhiro Abe, Okayama JAPAN
Kazuhiro Okuda, Okayama JAPAN
Hiroyuki Hashizume, Okayama JAPAN
Hajime Inoue, Okayama, JAPAN
Okayama University Graduate School of Medicine,
Okayama city, JAPAN
INTRODUCTION
The one leg hop test is regarded as a simple and
useful evaluation method for the functional
performance in anterior cruciate ligament (ACL)
injuries of the knee. We analyzed the results of the
one leg hop test in patients to assess the
functional performance using a three-dimensional
motion analysis system (Elite plus; BTS, ITALY) .
MATERIALS AND METHODS
We studied 4 knees in 4 patients (2 men and 2
women). Their ACL was found to be deficient by
MRI, manual examination and KT2000 in 2002.
Their mean age was 23.3 years old (18 to 29 years),
and the mean period from the injury to the test
was 7 months (4 to 11 months).
One legged vertical jump was performed on a
force platform. We measured and compared the
duration and height of the jump, the angle of the
knee joint at takeoff and landing phases, the
vertical force at landing, and the maximum flexion
angle of the knee joint after landing for
contralateral and ipsilateral legs. Data was
analyzed using a three-dimensional motion
analysis system.
RESULTS AND DISCUSSION
The duration and height of the jump in the injured
side were less than in the uninjured side. The
angle of the knee joint in the injured side was
smaller than that in the uninjured side at takeoff
and landing phases. The maximum flexion angle
of the knee joint after landing in the injured side
was smaller than that in the uninjured side. There
was no difference in the vertical force at the
landing phase between the ipsilateral and
contralateral sides.
The motion analysis system allowed us to analyze
additional factors during the hop test, which
might expand the assessment of functional
performance in ACL injuries.
E-poster #387
Supracondylar Femoral Fracture after Doublebundle
Anterior Cruciate Ligament
Reconstruction using Hamstring Tendons:
Report of a Case
Takehiko Suginoshita, Gifu, JAPAN, Presenter
Takashi Tsukahara, Gifu, JAPAN
Yoshiaki Kusaka, Gifu, JAPAN
Hiroto Komiyama, Gifu, JAPAN
Toshikazu Kubo, Kyoto, JAPAN
Murakami Memorial Hospital, Asahi University,
Gifu, JAPAN
Case report:
The patient was a 26-years-old man with a
deficient left anterior cruciate ligament. We
performed double-bundle anterior cruciate
ligament reconstruction using hamstring tendons
according to the inside-out technique in January
2003. Femoral ends of the reconstructed
ligaments were fixed with end-button CLs, and
tibial ends were fixed with three staples. His
postoperative course was favorable. However, he
collided with a tree while snowboarding on
February 10, 2004, and injured his left femur.
Radiographs of the left femur revealed two
fractures. The proximal fracture affected 1/3 of the