POSTER ABSTRACTS - ISAKOS

height decreases, the low leg alignment adopts
knee-in and toe-out position.
Our results show that a low plantar arch is a risk
factor for ACL injury because the plantar arch of
the ACL injured cases was significantly lower than
that of subjects without ACL injury.
However, there were no significant differences
between contact and non-contact injured cases.
When the athlete's plantar arch decreased, the
alignment of the lower leg would adopt the kneein
and toe-out position, thus he/she becomes
highly prone suffer on ACL either during a contact
and non-contact moment. Conversely the athlete
who has a normal plantar arch is not prone to ACL
injury in any situation.
An arch support can prevent ACL injury in athletes
with a low plantar arch.
[Conclusion] In ACL injured cases, the plantar
arch was significantly lower than in controls. A low
plantar arch is a risk factor for ACL injury.
E-poster #328
Arthroscopic Pull-out Repair for the Acute
Anterior Cruciate Ligament Rupture
Chong Hyuk Choi, Seoul, KOREA, Presenter
Jae Bong Chung, Seoul, KOREA
Youngdong Severance Hospital, Seoul, KOREA
Purpose : Direct repair of the anterior cruciate
ligament(ACL) has been criticized as an
invaluable surgery. This criticism was arose from
the complication regarding with classical large
open incision and from the mechanical failure of
torn ACL. Although the ACL reconstruction is a
gold standard for the chronic ACL deficient knee,
it has many difficulties in the whole processing of
recovery including graft selection, surgical
technique rehabilitation and proprioception. If
the original tissue of ACL would be preserved
adequately, the knee joint function will be
recovered in the more reasonable fashion. This
study was attempted to evaluate the results of
arthroscopic pull out repair of acute ACL tear with
minimal incision and to investigate the prognostic
factors.
Materials and Methods : Thirty-seven ACLs were
repaired within 3 weeks after trauma. We
investigated the MRI findings of ACL, location of
tear, status of synovium and associated injuries.
Twenty-nine ACLs were torn at the proximal one
third. Operation was done in the manner of pull
out repair with 5 stitches through two tunnels that
were created at the anatomical attachment area of
lateral femoral condyle for the proximal tear, two
tunnels through the proximal tibia for the distal
tear and each of two tunnels through both bone
for mid substance tear. In the case of partial
rupture, only ruptured segment was repaired
preserving intact segment. After two weeks of
immobilization, rehabilitation was started as
same protocol as ACL reconstruction. The average
follow up period was 23 months ( 14 months to 36
months).
Results : Lysholm knee score was used to evaluate
the clinical results. Twenty-seven of 37
patients(73%) were classified as excellent or good.
The KT-1000 arthrometer revealed 3.1mm side to
side difference in anterior displacement with 20
pounds of force. In seven patients who developed
recurrent pivot phenomena, ACL reconstruction
was performed. Six patients who had limited
motion improved with arthroscopic arthrolysis
and bricement. The clinical results were good for
the patients with proximal tear and intact
synovium with the diffuse edematous change of
ACL in MRI examination.
Conclusion: Arthroscopic repair for the acute ACL
tear was an effective surgery for the preservation
of the original ACL without disadvantages from
reconstructive surgery or classical large open
surgery in the selective patient. Preoperatively,
MRI evaluation was necessary for the examination
of tear pattern. The location of rupture and the
status of synovial coverage were considered as an
important prognostic factor.
E-poster #329
The Role of Immobilization on Tunnel
Enlargement After Anterior Cruciate Ligament
Reconstruction
Ozgur Ahmet Atay, Ankara, TURKEY, Presenter
Tolga Akkaya, Ankara, TURKEY
Mahmut Nedim Doral, Ankara, TURKEY
Darren Johnson, Lexington, KY USA
Ustun Aydingoz, Ankara, TURKEY
Hasan Bilgili, Ankara, TURKEY
Onur Tetik, Ankara, TURKEY
Gursel Leblebicioglu Ankara TURKEY
Hacettepe University, Ankara, TURKEY
Aim; The etiology of tunnel enlargement after
anterior cruciate ligament (ACL) reconstruction is
unknown. The many postulated factors, however,
can be divided into two broad categories:
mechanical and biological. In this study, we
eliminated mechanical factor by immobilizing the
knee after ACL reconstruction and tried to reveal
the biological factor on tunnel enlargement.