Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Arthroplasty - Knee
Abstract number: 26444
ANALYSIS OF FUNCTIONAL OUTCOME OF KNEES WITH ROTATING
PLATFORM MOBILE BEARING VERSUS POSTERIOR STABILIZED FIXED
BEARING PROSTHESES
Aditya AGGARWAL, Anuj AGRAWAL
Post Graduate Institute of Medical Education & Research Chandigarh, Chandigarh
(INDIA)
Full flexion of knee is a critical performance requirement for patients in Asia, Middle
East and increasingly for patients in Europe and North America. Range of motion
after Total Knee Arthroplasty is an important component of a patient’s overall
functional outcome. We conducted a randomised prospective study to compare the
clinical and radiological results of posterior-stabilised fixed-bearing and rotatingplatform
prostheses operated by a single surgeon. Thirty consecutive patients
undergoing primary, unilateral knee replacement for osteoarthritis were randomly
assigned to receive either a fixed-bearing (14 patients) or rotating-platform (16
patients) prosthesis. The mean follow-up period was 33.5 months, with a minimum
follow-up of one year. The Knee Society knee scores, pain scores, functional scores
and Oxford knee scores were not statistically different (p>0.05) between the two
groups. The mean postoperative range-of-motion of mobile-bearing knees was
significantly greater than that of fixed-bearing knees (127.6 degrees versus 110.5
degrees, p=0.016). The radiological analysis found no statistical difference in the
alignment of the knee, position of femoral and tibial components and position of joint
line between the two groups. Osteolysis was not seen in any knee in either group.
There was no bearing instability or spin-out in the rotating platform prostheses group.
The use of mobile-bearings in Total Knee Arthroplasty may lead to improvement in
the knee performance by simulating more closely normal knee kinematics. It may
increase the longevity of implants by reducing the polyethylene wear and
periprosthetic osteolysis.
154