Oxford® Partial Knee

The Oxford^® Partial Knee System is a natural evolution from the original meniscal arthroplasty, which was patented by John Goodfellow and John O‘Connor in 1974 and first used in 1976.

The earlier designs of the Oxford^® Partial Knee (Phase 1 and 2) have been successfully used to treat anteromedial osteoarthritis since 1982 and the Oxford^® Partial Knee implant is the result of continued development of its successful predecessors and inherits their 98% survival rate at 10 years with an average wear rate of 0.03mm per year. 

After 25 years it still maintains the advantage of a large contact area by employing a gliding meniscal bearing, which remains fully congruent throughout the range of motion, restoring the joint kinematics.as well as offering additional advantages such as 5 sizes of femoral component for improved fit and reduced bone removal, anatomically shaped tibial components for optimal tibial coverage, re-designed meniscal bearings to minimise impingement a new technique for reproducible surgery through a minimally invasive approach, which offers quicker recovery and lower morbidity.  Studies show that if the Unicompartmental operation is performed early in the disease process, it can arrest the progress of arthritis in other compartments of the joint and provide long term relief of symptoms.
 

Oxford^® Partial Knee Product Information

Clinically Proven
Clinical results of the Oxford^® Partial Knee show survivorship of 98% or more at 10 years from several centres, results that equal those of the most successful Total Knee Replacements. Clinical tests have also proven that Unicompartmental knee replacement prevents osteoarthritis from spreading to the unaffected lateral and patellofemoral compartments of the knee if the operation is performed at an early stage of the disease.

Minimal Polyethylene Wear
Previous attempts of designing meniscal bearings have shown a high level of wear in a short space of time. The polyethene is manufactured from ArCom^® polyethylene for increased wear resistance - compared with traditional U.H.M.W.P.E. and an average penetration rate of only 0.03mm per year. With this, it also provides fully congruent articulating surfaces with total area contact (570mm²) through the complete range of motion.

Restores Kinematics
The Oxford^® Partial Knee is indicated for anteromedial osteoarthritis. The nature of the design is to preserve the ACL, which enables restoration of the natural kinematics of the knee, thus restoring the natural balance and stability in flexion and extension.

The design of the Oxford^® Partial Knee permits a minimally invasive technique through the use of specially designed instrumentation. Consequently it is no longer necessary to surgically expose healthy parts of the knee. The specially developed instrumentation means that bone cuts are made to accurately balance flexion and extension gaps through a 6 cm incision. The minimal incision avoids disruption of the quadraiceps mechanism - hence a quicker recovery.

For further information on the Oxford^® Knee, Minimally Invasive Surgery and Product information please go to www.oxfordknee.net.