POSTER ABSTRACTS - ISAKOS

demonstrated the validity of AS. Difficulty of
function (p=0.000) and number of diseases
(p=0.001) were significant explanatory variables.
Although pain was significantly correlated with AS
scores, its effect on activity is indirectly through
limiting function. Besides its validity at a certain
point in time, AS was sensitive to change in
patient status between baseline and follow-up
(p=0.000). Reliability of AS was also established
since baseline values correlated with follow-up
scores (p=0.000). Correlation of change in AS with
changes WOMAC pain, stiffness, and difficulty in
function as well as comorbidities were similar to
time point correlations.
Conclusions
This study has developed and validated an AS as
an effective instrument in the assessment of TKAR
patients. This will allow more accurate analysis of,
and ultimately the ability to predict, outcomes. It
may also, therefore, eventually prove to be a
useful adjunct to practical and objective clinical
decision-making in total knee arthroplasty
revision.
E-poster #537
Kellgren-Lawrence(K-L) Scores and
Arthroscopic Findings in the Degenerative
Knee
Arun Ramappa, Vail, CO, USA, Presenter
J. Richard Steadman, Vail, CO USA
Timothy S Bollom, Vail, CO USA
Mindy Fein, Vail, CO USA
R Brian Maxwell, Vail, CO USA
Karen K Briggs, Vail, CO USA
Steadman Hawkins Sports Medicine Foundation,
Vail, CO, USA
Introduction: Other studies have shown that
Kellgren-Lawrence (K-L) score can differentiate
severity of osteoarthritis as compared to MRI,
however this has not been done compared to
arthroscopic findings. The purpose of this study
was to determine if differences exist between
knees with grade III and grade IV K-L based on
arthroscopic findings.
Methods: Tibiofemoral knee osteoarthritis was
graded according to the Kellgren-Lawrence (K-L)
scale in 89 knees Presenter for arthroscopic
treatment of osteoarthritis of the knee. The study
group consisted of 55 males and 34 females with
an average age of 55 (range 37 to 88) years. The
was no age difference between gender. All
radiographs were examined by an orthopedic
surgeon and arthroscopic data was collected
prospectively and recorded by orthopedic
surgeon.
Results: On examination of radiographs, 5 knees
had a grade II K-L, 47 had grade III K-L, and 37
had grade IV K-L. All knees had documented
osteophytes and sclerosis on radiographs. 87
knees had joint space narrowing.
At arthroscopy, kissing lesions in one
compartment were noted in 49 knees, and kissing
lesions in both the medial and lateral
compartment were noted in 17 knees. Meniscal
pathology was present in 78 knees (37 had medial
and lateral pathology). In comparing Grade III &
IV K-L, there was no difference in age. There was a
difference between K-L grade III & IV and gender,
with more males having Grade IV K-L.(p=0.001)
There was a difference between the number of
cartilage surfaces with Grade 3 or 4 damage, as
visualized on arthroscopy, and K-L grade III and K-
L grade IV. More knees with Grade IV K-L had
more grade 3 or 4 lesions on 3 or 4 surfaces than
grade III K-L.(p=0.001) Grade IV K-L also had
significantly more kissing lesions than grade III K-
L.(p=0.0001)
There was a significant difference between grade
III & IV K-L and the presence of meniscal
pathology.(p=0.032) However, of those knees with
meniscal pathology, the presence of both medial
and lateral meniscal pathology was not different
between K-L grade III and K-L grade IV.(p=0.49)
Conclusion: In this study population, a difference
was found in gender, chondral surfaces and
meniscal pathology between Grade III K-L and
grade IV K-L. The K-L scale can differentiate
between moderate and severe osteoarthritis.
E-poster #539
The Anterior Femoral Cortical Line as a
Landmark in Total Knee Arthroplasty
Ruy Eduardo da Assuncao, Bournemouth,
UNITED KINGDOM,
Chris TJ Servant, Woodbridge, Suffolk, UNITED
KINGDOM, Presenter
Harish Kurup, Southampton, Hampshire, UNITED
KINGDOM
Salisbury District Hospital, Salisbury, UNITED
KINGDOM
Introduction:
Accurate placement of the femoral component in
total knee arthroplasty, particularly in rotation, is
vital to ensure a biomechanically stable construct.
Reproducible femoral landmarks such as the
anteroposterior axis (APA or Whiteside’s line), the