Benefits Of The Oxford Partial Knee Replacement:
Only replaces 1/3rd of your knee leaving the other good 2/3rd alone
Preserves all your knee ligaments
Has excellent long term durability
Very low wear (0.1mm per annum)
Minimally Invasive Technique
Revovery 3x as fast as standard Total Knee Replacement.
High Knee Flexion is typical
For Young patients it can be regarded as a pre-knee replacement - it is straigtforward to change to a Total knee Replacement later if required. The Oxford Partial Knee replacement is a resurfacing operation that preserves as much of your good knee as possible, and simply recoats the two worn opposing surfaces and has a special plastic cartilage-like spacer between.
· 1 in 4 people with painful knee arthritis are suitable for the partial knee replacement instead of the traditional total knee replacement.
Minimally Invasive 'Keyhole’ surgery.
The advantages of the minimally invasive approach are:
- Your recovery is twice as quick compared to the traditional open approach
- Your scar is only about 3 inches long.
- Your time in Hospital is 2-3 days.
The minimally invasive technique was developed in 1998, the studies show the accuracy of implantation is as good as the open technique but without the larger scar. The lack of postoperative pain has allowed most patients to leave the hospital two or three days after surgery. Some go home the same day.
History and Design
Simply designed to minimise wear of materials and restoring the natural joint motion.
In 1974 John Goodfellow and John O'Connor patented the principle of meniscal bearing knee replacement for knee replacement, the Oxford® Meniscal Knee was developed.
The inner half of the natural knee functions as a ball and socket “swivel” joint but with some front to back motion as well. The white meniscal bearing (spacer) bearing allows free rotation on its upper surface and is also able to glide forwards and backwards on it’s under side. This design allows full contact of the surface areas throughout the range of motion. It is this large surface area of contact which is key to its success, wearing 10 times less than similar devices that do not have this mobile bearing feature.
Long term clinical results of the Oxford® Partial Knee show 95%-98%* success at 10 years, and 94% at 15 years, equalling the results of the best Total Knee Replacements.
Minimal Meniscal Bearing Polyethylene Wear
Retrieved bearings show an average wear rate of only 0.03mm per year. The bearings are manufactured from a specialised plastic called ArCom® polyethylene. This is an inert, low friction plastic in which the structure is heavily matted and interlinked for increased wear resistance, 47% less than traditional materials.
Tibial Component (top of the shin bone)
Flat polished Cast Cobalt Chrome surface for minimal wear articulating with the flat underside of the Meniscal bearing. Designed to match the natural anatomical shape of the upper shin bone for bone coverage without overhang.
Femoral Component (end of the thigh bone)
Again polished cobalt chrome alloy, it functions as part spherical resurfacing component. It is strong enough for everyday activities and most sporting activities of low to medium impact. It is fixed to the bone with orthopaedic bone cement.
*Murray DW, Goodfellow JW, O'Connor JJ.
The Oxford® medial unicompartmental arthroplasty, a ten year survival study.
J Bone Joint Surg [Br] 1998;No.6;80-B:983-989