POSTER ABSTRACTS - ISAKOS

grade 1-3) and near normal joint motion. The
average pre-operative duration of symptom was
16.6 and 18.4 months both the clinical groups
respectively. Patients were followed up at six
monthly intervals for 3-4 years (Average 38.4
months) and results evaluated with 100mm visual
analogue score and Lyshkom’s Knee score. The
average preoperativescore in both groups was 48.4
and 46.5 respectively .
Results:
At first year of study, patients in both clinical
groups had similar functional improvements,
average knee score being 84.6 and 88.4
respectively, however, VAS were less in
supplementary visco supplementation group. In
subsequent years, the knee score in arthroscopic
debridement group fell from 78.4 at second year
and 67.8 at third year to 62.5 at fourth year. In
Post surgery visco supplementation group, the
scores initially at two year was 82.5 which
plateued to 78.4 at three years and subsequently
fell to 72.2 in fourth year. Recurrence of
mechanical symptoms such as locking and giving
way in both clinical groups at two years was 13.7
% and 7.1% respectively, at three years 19.5% and
9. 3% respectively and at fourth year was 38% and
20.8% respectively. All 24 patients with mild
osteoarthritis treated with surgery and visco
supplementation were symptom free at four years
follow up, while 12 out of 14 patients with milder
disease treated with surgery alone had started
having problems at similar follow up.
Conclusions : Patients who benefit most of
arthroscopic joint debridement have history of
mechanical symptoms such as Knee locking of
short duration , near normal axis deviation and
mild to moderate radiographic evidence of
osteoarthritis . Post arthroscopic visco
supplementation improves the joint biology thus
improving the extent and duration of pain relief .
In early stage of disease such a combination
treatment is often curative . Even in advanced
stages it helps delay the progression of disease
and postpones any further surgical intervention by
2 - 3 years. The rationale of combination therapy
of biologic and mechanical intervention seems to
be an acceptable modality in changing the
progression of disease .
•E-poster #502
Non-manufacturer Linked Navigation for Tibial
Osteotomies: An Easy Way to Increase
Intraoperative Limb Angle Measurement
Accuracy
Rafael Arriaza Loureda, La Coruna, SPAIN,
Presenter
Carlos Sampedro, La Coruna, SPAIN
Caesar Fernandez Rodriguez, La Coruna, SPAIN
Jesus Aizpura Prada, La Coruna, SPAIN
Hospital USP Santa Teresa, La Coruna, SPAIN
One of the main difficulties that most authors find
in tibial osteotomy surgery is precise angle
correction. To overcome this difficulty, the authors
have been using a navigation system originally
designed for total knee arthroplasty (Orthopilot,
Aesculap) with the aid of arthroscopic
intraarticular probe positioning during both
opening and closing wedge tibial osteotomy. The
method has proved to be simple, reliable and,
very important, can be used with any fixation
method and both with opening and closing
osteotomies, without the obligation to link it to
any manufacturer. The technique is presented
along with the results of the first 15 cases. Using
any navigation system available in knee surgery
units to increase precision in osteotomy surgery
could be a viable option for any surgeon
interested in this field, without the necessity to
change the actual surgical technique, and with a
minor increase in surgical time.
E-poster #503
The Role of the Two Bundles of PCL Should be
Considered During TKA
Tomomaro Kawamata, Sendai, Miyagi JAPAN,
Masahiro Ohnuma, Sendai, Miyagi Prefecture,
JAPAN
Satsuki Onoda, Sendai, Miyagi Prefecture, JAPAN
Hiroyuki Takano, Sendai, Miyagi Prefecture, JAPAN
Ikuo Maeda, Sendai, Miyagi Prefecture, JAPAN
Jutaro Umehara, Omagari, Akita Pref. JAPAN
Department of Orthopaedic Surgery, Tohoku
Univ., Sendai, Miyagi, JAPAN
Background: Some authors recently focused on
the relationship between the posterior cruciate
ligament (PCL) and equality of flexion-extension
joint gaps and varus-valgus ligament balance
during total knee arthroplasty (TKA). It was
clarified that the functions of the two bundles of
PCL were different.
Purpose: To examine the influence of the
resection of the posteromedial (PM) and
anterolateral (AL) bundles on equality of flexionextension
joint gaps and varus-valgus ligament
balance.