POSTER ABSTRACTS - ISAKOS

performed about the stability of tibial cross pin
fixation techniques.
E-poster #317
Return to Sports After Anterior Cruciate
Ligament Reconstruction for Handball and
Basketball
Yoshinobu Maruhashi, Ishikawa, JAPAN,
Presenter
Katsuhiko Kitaoka, Ishikawa, JAPAN
Ryuichi Nakamura, Ishikawa, JAPAN
Akira Okano, Ishikawa, JAPAN
Kenichi Nakamura, Ishikawa, JAPAN
Takeshi Tsuyama, Ishikawa, JAPAN
Yosuke Shima, Ishikawa, JAPAN
Kasturo Tomita, Ishikawa, JAPAN
Kanazawa, Ishikawa, JAPAN
< Introduction > Anterior cruciate ligament (ACL)
injuries are common in the high risk pivoting
sports of handball and basketball, and for athletes
engaged in these sports, a return to competitive
play at the earliest possible opportunity is of great
importance.
< Purpose > The purpose of this study was to
examine the return to their sport after ACL
reconstruction for handball and basketball
players.
< Patients and Methods > This study examined 50
patients who underwent Howell’s ACL
reconstruction method using hamstring tendons.
Six of the injuries were incurred by males and 44
by females. All patients were athletes engaged in
handball and basketball at a high level of
competition. Full return to sports was allowed at 4
months, depending on muscular strength and
progress of rehabilitation. We evaluated the
mechanisms of the injuries, muscular strength,
KT-values, return to competition, IKDC, Lysholm
score, and knee injury after reconstruction.
< Results > Nearly all the injuries occurred in
non-contact situations (88.7%) and during games
(77.4%). Four months after ACL reconstruction,
nearly all patients recovered 90% of the muscle
strength of noninvolved side. The average KT
value one year after ACL reconstruction was 1.2
mm. Sport at the same level as before could be
resumed by 20.8% of the patients 4 months after
ACL reconstruction, by 75.5% after 6 months and
by 86.8% after one year. The IKDC score showed
94.3% of the condition of the knees had returned
to normal or nearly normal, and the average
Lysholm score was 98 points one year after ACL
reconstruction . Re-ACL rupture, ACL rupture on
the contralateral side, and meniscus injury after
ACL reconstruction were recognized in 5.7% each
of the patients.
< Discussion > We selected the reconstruction
material, operative method and rehabilitation
which endure for early return to competition.
Training of balance, planting and landing are
important. Rate of return to the competition is not
so good. In addition, re-traumatism occurs at a
reported incidence of 8%. The postoperative
results of our series were good, but we recognized
re-laceration after ACL reconstruction, ACL
rupture on the contralateral side, and meniscus
injury in about 5.7% each of the patients. We plan
to investigate the cause of these re-traumatisms
in order to prevent them in future.
E-poster #318
Configuration of the Tibial Lateral Condyle in a
Non-contact Type Knee Injury of the Anterior
Cruciate Ligament
Katsuhiko Kitaoka, Ishikawa, JAPAN, Presenter
Yoshinobu Maruhashi, Ishikawa, JAPAN
Ryuichi Nakamura, Ishikawa, JAPAN
Akira Okano, Ishikawa, JAPAN
Kenichi Nakamura, Ishikawa, JAPAN
Takeshi Tsuyama, Ishikawa, JAPAN
Yosuke Shima, Ishikawa, JAPAN
Kasturo Tomita, Ishikawa, JAPAN
Takara-Machi, Kanazawa, Ishikawa, JAPAN
< Introduction > Most anterior cruciate ligament
(following ACL) knee injuries are of the noncontact
type, but the mechanism of these injuries
is not yet fully understood. In this study we
therefore focused on the configuration of the
tibial lateral condyle as an anatomical intrinsic
risk factor for ACL injury of the non-contact type.
< Purpose > We hypothesized that high convexity
of the lateral tibial condyle can cause ACL injury
of the non-contact type. The purpose of this study
was to examine by means of MRI the relationship
between non-contact ACL injury and the
configuration of the tibial lateral condyle.
< Patients and Methods >
For this study we examined 65 patients who had
undergone a checkup because of a chief complaint
of a disorder of the knee in our hospital’s
Department of Sports Medicine. Three groups
were compared: Group I, bilateral ACL ruptures( 6
females, 12 knees ) ; Group II, unilateral ACL
ruptures ( 10 males, 17 females ) ; Group III,
normal knees( 18 males, 14 females ). All MRI
scans were performed at the same institution at