POSTER ABSTRACTS - ISAKOS

Methods: A total of 14 consecutive TKAs for varus
osteoarthritis were examined. PM bundle was
first resected and then AL bundle was resected.
Flexion-extension joint gaps and varus-valgus
ligament balance were measured using Natural
Balance (Centerpulse Orthopedic Inc) at 40 lb
distraction force. The changes of flexionextension
gaps and varus-valgus ligament balance
before and after the resection of PM and AL
bundle were recorded.
Results: The increase in extension gap after the
resection of PM bundle (average, 1.18mm) was
statistically significant. The increase in flexion
gap after the resection of AL bundle (average,
3.86mm) was statistically significant. The
decrease in varus alignment was significant after
the resection of PM bundle. The increase in varus
alignment was significant after the resection of AL
bundle.
Conclusions: The resection of PM bundle was
effective on increasing extension gap and
decreasing varus alignment. However, the
resection of AL bundle was not recommended
because it excessively increased flexion gap and
aggravated varus alignment.
E-poster #504
The Efficacy of Magnets in the Management of
Osteoarthritis of the Knee: A Randomized
Clinical Trial
Steve MacDonald MD, London, Ontario,
CANADA,
Alexandra Kirkley, London, Western Ontario,
CANADA
Sharon Griffin, London, Ontario, CANADA,
Presenter
Jason Ashley, London, Ontario, CANADA
Craig Griffin, London, Ontario, CANADA
Fowler Kennedy Sport Medicine Clinic and LHSC,
London, Ontario, CANADA
Purpose: To compare the effectiveness of
neoprene knee braces containing high-power
static magnets to sham magnets in the
management of osteoarthritis of the knee
Method and Discussion: All study patients were
recruited from a knee arthroplasty waiting list. At
baseline and at 2, 6, 12 and 24 weeks each patient
completed a WOMAC, MACTAR, KOOS quality-oflife
questionnaire, SF-36 global health measure,
and 6 minute walk and 30 second stair climb after
which they were asked to determine their general
fatigue, pain and shortness of breath on a 100mm
VAS scale. Patients were instructed to wear their
brace at least 6 hours per day and when active
(walking, shopping, golfing).
Results: A prospective double-blinded
randomized clinical trial was conducted. 96
patients with moderate to severe osteoarthritis of
the knee were randomized to receive a Magnet (M)
or Sham (S) knee brace. Both groups were equal
with regards to age (M = 71.1 yrs, S = 66.8yrs),
severity of disease, gender and all baseline
measures. No statistically significant difference in
patient-related quality-of-life and objective
functional evaluation was found between groups
at any time interval. Both groups however showed
significant improvement over time.
Conclusion: No statistically significant difference
in patient-related quality-of-life and objective
functional evaluation was found between groups.
Significance: This study provides patients and
doctors with evidence as to the efficacy of this
type of therapy. It will allow those individuals on
fixed incomes to utilize their resources to the best
advantage to minimize their symptoms related to
osteoarthritis of the knee.
E-poster #505
Abrasion Arthroplasty with Osteotomy for
Medial Compartment Osteoarthritis of the
Knee, a Viable Alternative to
Unicompartmental or Total Knee Joint
Replacement?
Jurgen Toft, Munich, GERMANY, Presenter
Alcy Vilas-Boas, Jr., Munich, GERMANY
Alpha Klinik, Munich, GERMANY
Summary:
Purpose: The Objective of this study is to
demonstrate that a combination of abrasion
arthroplasty and osteotomy can be a viable
alternative to replacement surgery, irrespective of
age, and with outcomes that are superior to
results reported in the literature for TKR and UKR,
treating practically the same pathology.
To measure and compare outcomes, the ''Oxford
Score'' was used which measures clinical
satisfaction after surgical treatment for
osteoarthritis of the knee.
Type of study: Retrospective study.
Methods: Between 1989 and 2002, 486 medial
compartment abrasion arthroplasties with valgus
osteotomy were performed. The Qxford knee
questionnaire was sent to 470 patients, of which
296 were correctly answered and sent back. All
patients had grade III/IVcartilage lesions in the
medial compartment, according to the