POSTER ABSTRACTS - ISAKOS

surgery. AOFAS did not improve in one ankle.
MRIs showed filling of the defect in all the treated
knees. At one-year follow up, subchondral bone
edema was evident in 4 knees. In the ankle, the
patient with the kissing lesion showed failure of
the implant with bone to bone contact at MRI.
Histological analysis on the biopsies revealed
good definition of the tidemark, presence of type
II collagen and chondroitinsulphate.
Ultrastructural findings included reorganization of
the fibrillar network and cellular cluster. Cells
presented well developed sarcoplasma, Golgi
apparatus with secretory vescicles testifying an
intense metabolic activity.
Conclusion: Clinical results and MRI findings
support the efficacy of the MACI technique.
Morphological findings are indicative for hyalinelike
tissue formation in the implant site.
E-poster #750
Nontreatment of Stable Medial Meniscal Tear
Seen During Anterior Cruciate Ligament
Reconstruction
Sadao Niga, kawaguchi, Saitama JAPAN,
Hiroo Ikeda, Kawaguchi, Saitama JAPAN
Akiho Hoshino, Kawaguchi, Saitama JAPAN
Takeshi Muneta, Tokyo, JAPAN
Kawaguchi Kohgyo General Hospital, Kawaguchi,
Saitama, JAPAN
PURPOSE: The purpose of this study is to describe
our experience with untreatment therapy of stable
and asymptomatic medial meniscal tear during
ACL reconstruction.
MATERIAL AND METHODS: Between Sep 1994
and Jan 2002, we performed 505 ACL
reconsruction using multi-strands autogenous
hamstring tendons. A total of 288 medial meniscal
tears were identified at the time of ACL
reconstruction. These tears were treated by partial
removal or meniscal repair (184), or were left
alone(104). Of the 104 patients with medial
meniscal tear left alone, 47patients had a
minimum of 2 year's clinical follow-up (average
3.1years, range, 2 to 7.3) and underwent secondlook
arthroscopy. This group included 21 men and
26 women. The average age was 22.4 years (range,
13-38 years).
RESULTS: During the follow-up periods, no
patients came to the hospital with a susupected
medial meniscal tear. At the second-look
arthroscopy, 37 medial meniscal tears had healed;
however, 10 medial meniscus had a tear. Of the 10
medial meniscal tear, 2 medial meniscal tear were
unstable by probing, treated by partial medial
meniscus removal, 8 medial meniscal tear were
stable and asymptomatic, left untreated again.
The KT-1000 arthrometer mean side-to-side
difference at manual maximum was 0.7+/-1.1mm
The mean isokinetic peak extension torque for the
ipsilateral knee was 95% of the contralateral knee.
The mean Lysholm score was 98 (range, 85-100).
Of the 47 patients, 40 patients returned to their
preinjury sport activity by the time of the followup
examination. There is no case that medial
meniscal tear could be considerd as a cause of
inhibiting their sports return.
E-poster #751
Incidence and Magnetic
Resonance/Arthroscopic Correlation Over Knee
Osteochondral Lesions. A Prospective Study.
David Figueroa, Santiago, CHILE, Presenter
Rafael Calvo, Santiago, CHILE
Miguel a Carrasco, Santiago, CHILE
Rodrigo Marcelo Mardones, Santiago, CHILE
Clinica Alemana, Santiago, CHILE
Incidence and magnetic resonance/Arthroscopic
correlation over knee osteochondral lesions. A
prospective study.
David Figueroa M. D., Rafael Calvo M. D., Miguel
Carrasco M. D., Rodrigo Mardones M.D. Alex
Vaisman MD.
Introduction:
Articular cartilage damage represent a diagnostic
and therapeutic challenge specially in young
population. Different surgical alternatives has
been described for the treatment of these lesions.
Each one has is advantages and disadvantages. In
order to select the appropriate surgical treatment,
it is necessary to have an effective preoperative
diagnostic and adequate preoperative plan.
Unfortunately preoperative diagnosis is often
difficult in chondral lesions. Magnetic resonance
tend to be helpful in the diagnosis of cartilage
damage. However even with specific new
techniques for cartilage the efficacy of the MRI is
variable.
Our goal is to evaluate in prospective manner the
incidence of chondral / ostheocodral lesions
during knee arthroscopic procedure and its
correlation with magnetic resonance.
Materials and Methods.- From March 2003 to
February 2004, 250 (two hundred and fifty) knees
arthroscopies were done by the investigator
group. Of these, 190 (one hundred and ninety)
patients (116 men and 74 women) needed