There are three compartments to the knee: the medial (inside) compartment, the lateral (outside) compartment and the patellofemoral (kneecap) compartment. Depending on where the arthritis affects your knee, partial knee resurfacing may be an option for you. PKR is a growing procedure. There are approximately 70,000 partial knee resurfacing procedures done in the U.S. each year.1
Partial knee resurfacing (PKR) is a surgical procedure for helping to relieve arthritis in one compartment of the knee. With PKR, only the damaged surface of the knee joint is replaced, helping to minimize trauma to healthy bone and tissue. The surgeon removes only damaged bone in the affected knee and fits the implant to that bone.
Unicompartmental Knee Resurfacing is a procedure that resurfaces only the affected compartment of the arthritic femur and the tibia.
Patellofemoral Knee Resurfacing is a procedure that resurfaces the worn patella and the trochlea (the groove at the end of the thighbone).
The bearing surface is defined as the two parts of the knee implant that glide together throughout motion. Triathlon PKR utilizes Stryker's advanced bearing technology, called X3®, which has demonstrated up to 96% decrease in wear in laboratory testing compared to competitive premium bearing surfaces in TKRs.2 Triathlon PKR is the only unicompartmental knee with this technology.
Patellofemoral pain (anterior knee pain) is pain felt between the patella (kneecap) and the thighbone. Patellofemoral Knee Resurfacing is a procedure that resurfaces the worn patella and the trochlea (the groove at the end of the thighbone) to alleviate this pain.
With the Avon® Patellofemoral Knee System, joint resurfacing may be an alternative to total knee replacement for patients with patellofemoral arthritis. It is designed to reproduce the natural patellofemoral joint throughout movement and facilitate sliding of the patella along the end of the thighbone. It is also designed to produce a natural-feeling knee with comfortable and reliable function.
The Avon® Patellofemoral Knee System is the only one with up to 5 years of published clinical results with 90% success in over 100 knees.3
Following a patellofemoral knee resurfacing, you may be able to get up and walk on the first post-operative day and start an active range of knee movement. Ninety degrees of knee movement may possibly be achieved within 4-6 days; patients can be discharged within this period.
All knee implants (including total knee implants) have a limited life expectancy. Based on your age, weight, and activity level, a PKR implant may relieve pain and last for a number of years.
1. 2008 Projection, Millennium Research Group, 2005.
2. Stryker Orthopaedics Test Report: 06-013.
3. Ackroyd, Christopher E., Development and Early Results of a New Patellofemoral Arthroplasty, Clinical Orthopedics and Related Research,Vol. 436, July 2005, pp. 7-13.