POSTER ABSTRACTS - ISAKOS

espectively. The wire was positioned at 38±16%
of the length of the ACL attachment and at
40±17% of the width. Eighty percent of the wires
were positioned at between 35% and 48% of the
attachment length.
Conclusion: the 65 Howell guide ensures
anatomical positioning of the graft on the tibial
side and reproducibility can be expected. It avoids
roof impingement even when placed in the
anteromedial bundle.
E-poster w/ Standard #435
The Short-Term Results of Lateralized Single-
Route Reconstruction With a Patellar Tendon
Graft and Anatomical Two-Route
Reconstruction With a Hamstrings Tendon
Graft to Treat Anterior Cruciate Ligament-
Deficiency
Eiichi Tsuda, Hirosaki, Aomori, JAPAN, Presenter
Yasuyuki Ishibashi, Hirosaki, Aomori, JAPAN
Hideki Sato, Hirosaki, JAPAN
Satoshi Toh, Hirosaki, Aomori, JAPAN
Hirosaki University, Hirosaki, Aomori, JAPAN
PURPOSE: Based on recent biomechanical
studies, graft placements that better restore the
rotatory stability in lower flexion angle have been
recommended in anterior cruciate ligament (ACL)
reconstruction. One is a single-route
reconstruction with a laterally placed femoral
tunnel close to the insertion of the posterolateral
bundle. The other is a two-route reconstruction
replacing both the anteromedial and
posterolateral bundles anatomically. The purpose
of this study was to investigate the short-term
results of lateralized single-route reconstruction
(LSRR) with a patellar tendon graft and
anatomical two-route reconstruction (ATRR) with
a hamstrings tendon graft.
MATERIALS AND METHODS: Fifty-four ACLreconstructed
knees followed-up for more than 12
months were involved in this study. Twenty-nine
patients (11 females and 18 males, average age of
22.0 years) underwent LSRR with a patellar
tendon graft. The tibial tunnel was placed in the
center of the ACL insertion and the femoral socket
drilled at the 10 o’clock position in right knees or
2 o’clock in left knees through the tibial tunnel. A
bone-patellar tendon-bone graft was fixed using
interference screws in knee extension. Twentyeight
ACL-deficient knees (17 females and 11
males, average age of 22.0 years) underwent ATRR
with semitendinosus and gracilis tendons. Two
femoral sockets and two tibial tunnels were
placed on the insertions of the anteromedial and
posterolateral bundles. The tendons were fixed to
the femur using endobuttons and to the tibia
using a post screw in 20 degree of knee flexion.
Postoperative knee stability was assessed by
pivot-shift test and KT-1000 arthrometer. The
IKDC evaluation form was employed for
evaluation of the overall function of ACLreconstructed
knees. Statistical analysis was
performed using the Mann-Whitney’s U test and
the Chi-square test.
RESULTS: No patient required a revision surgery
due to a recurrent anterior instability. The
averages of postoperative side-to-side difference
in KT-1000 were 0.5±1.4mm for LSRR and
0.5±1.6mm for ATRR. Four knees (14%) in LSRR
and 4 knees (14%) in ATRR were revealed as
positive in pivot-shift test. Twenty-three knees
(79%) in LSRR and 22 knees (79%) in ATRR were
classified as Normal of IKDC evaluation. None of
the 56 knees was classified as Abnormal or
Severely Abnormal. No significant difference in
the parameters examined clinically was detected
between LSRR and ATRR.
CONCLUSIONS: While only the short-term results
are shown in this study, it was suggested that
LSRR with the patellar tendon graft could restore
anterior and rotatory stability in lower flexion
angle comparable to ATRR with the hamstrings
tendon graft. The patellar tendon graft is inferior
for reproduction of the anatomy of the normal
ACL compared to the hamstrings tendon graft.
This disadvantage of the patellar tendon graft,
however, is compensated with laterally placing the
femoral socket close to the insertion of the
posterolateral bundle.
E-poster w/ Standard #436
ACL Reconstruction: Comparison of Bone-
Patellar Tendon-Bone Graft with Central
Quadriceps Tendon. A Retrospective Study
Myung Chul Lee, Seoul, KOREA,
Sang Cheol Seong, Seoul, KOREA
Sahnghoon Lee, Seoul, KOREA, Presenter
Chong Bum Chang, Seoul, KOREA
Yoon Keun Park, Seoul, Seoul KOREA
Hyunchul Jo, Seoul, Seoul KOREA
Dept Orthopaedic Surg Seoul National University,
Seoul, KOREA
Introduction : The purpose of this study is to
compare the outcome of ACL reconstruction using
patellar tendon (BPTB) to that using central
quadriceps tendon autograft. Methods : One