The effect of lateral opening wedge distal femoral osteotomy on leg length
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The
Knee Society Score
(KSS) functional
component improved from 50.4 (26.0-80.0) to
68.5 (1.0-97.0), though this did not reach
statistical significance (p=0.12). 25 patients
were satisfied or very satisfied, and 4 were
unsatisfied. There was one loss of fixation
(fig. 3), two delayed or non-unions and one
case of post-operative stiffness. There were
five revisions to arthroplasty for disease
progression at mean time of 166.6 months post-
operatively. The probability of survival at
60 months was 91.4% [95% confidence interval
100%-74.9%] with end-point of revision to
total knee arthroplasty and 87.6% [95%
confidence interval 100%-74.1%] for revision
for complications (fig. 4).
Fig. 2: Postoperative radiographs of a 50 year old patient who
presented with an idiopathic genu valgum of 188°.
Fig. 3: 40 year old patient with multiple
sclerosis with loss of fixation of the osteotomy
at day 20 postoperatively: Preoperative long
leg views with mFTA of 197°, immediate
postoperative radiograph, fracture at day 20.
The medial hinge fractured secondary to poor
bone quality.