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JUEVES / THURSDAY
190
the patients at the time of surgery was 67
years. Forty-four patients were male and
39 female. Nine patients died at a mean
of 6.6 years after the index arthroplasty. No
patients were lost to follow-up. The mean
duration of follow-up of the surviving patients
was 10.0 years.
Results:
At the time of the most recent follow-up, 11
medial compartment arthroplasties (10.3%)
and both lateral compartment arthropalsties
(100%) had been revised at a mean of 4.2
years. Of the 13 revision procedures, three
required use of revision components, and
none required bone graft or augments. The
mean Knee Society score for the surviving
patients who had not had a revision improved
from 100 points preoperatively to 172 points
at the most recent evaluation. Kaplan-Meier
survivorship analysis revealed a probability
of survival free of revision or radiographic
loosening of 93% at 5 years, and 86% at
10 years.
Conclusions:
The Miller-Galante unicompartmental knee
arthroplasty can provide reliable pain relief
and restoration of function in selected patients.
Our experience has shown that the
survivorship of this implant approaches that
of tricompartmental knee arthroplasty, and
suggests that it may offer the advantage of
ease of revision.
UNICONDYLAR KNEE
REPLACEMENT
D. Dalury
John Hopkins Hospital, Baltimore, USA
UKAs have enjoyed a minor resurgence in
popularity with increasing interest in miniincision
surgery. Newer implants, improved
instruments and better techniques have been
credited with the procedures new popularity.
While the classic UKA patient remains an
elderly, thin, female with minimal deformity
there has been more focus on utilization of the
UKA as an alternative to HTO, and TKA in the
younger patient. Early results with the newer
designed implants will be reviewed.
THE OXFORD KNEE
K. R. Berend, MD and A. V.
Lombardi, Jr, MD, FACS
Joint Implant Surgeons, Inc.; The
New Albany Surgical Hospital
The Ohio State University;
New Albany, Ohio, USA
Summary: At two years, obesity, young age,
and the presence of pre-operative anterior
knee pain do not appear to negatively impact
the outcome of Oxford UKA
Some believe the so-called “Oxford Indications”
for unicondylar arthroplasty are too
liberal. Much of the debate in the United
States centers on the performance of UKA
in severely obese patients, young patients,
and patients with anterior knee pain or patellofemoral
DJD. Since approval of the Oxford
UKA in 2004 we have performed over 300
cases using the Oxford criteria. The average
age of the patients was 62.4 years (range:
41-87; SD: 12) with 54% of patients under 60
years old. The average weight of the patients
is greater than 90 kg (range: 51-142; SD: 17
kg). In 64% the patient weight was greater
than 80 kg. The average BMI of the patients
was 31.6 (range: 21-48; SD: 6). 61% were
performed in patients considered obese with
a BMI greater than 30. In 25% of cases the
patients were categorized as morbidly obese
with BMI greater than 35. More than 40% of
UKA were performed in patients with a BMI
greater than 32, a category considered at risk
for failure secondary to obesity. 6% of patients