- Conforming, spherical design minimizes contact stress throughout entire range of motion
- Curved inner geometry for minimal bone removal
The most widely used1 and clinically proven2,3 partial knee in the world
With 45 years of clinical heritage, the Oxford Partial Knee is the most widely used1 and clinically proven2,3 partial knee system in the world.
- Knee Reconstruction
- Partial Knee Replacement
- Mobile Bearing
- Partial Knee Arthroplasty
Survivorship at 15 years
At Minimum 15 Year Postoperative (432 knees)6
Survivorship at 20 years
91.0% Kaplan Meier Survivorship at min 20 years (14 knees)2
The Oxford Partial Knee offers surgeons a partial knee replacement that is less invasive and has demonstrated lower morbidity and pain scores when compared to total knee replacement.6
Reproducible Microplasty Instrumentation
Microplasty Instrumentation simplifies the surgical technique, providing for accurate and reproducible implant positioning.8 Microplasty instrumentation also shows a reduction in OR time of almost 9 minutes,9 reduced risk of dislocation10 and improved alignment11 compared to Phase 3 Instrumentation.
- Only true mobile meniscal bearing knee system approved for use in the U.S.
- Mobile bearing designed to remain fully congruent with the femoral and tibial components throughout entire range of motion5
- Clinically proven low wear rates with ArCom® Direct Compression Molded Polyethylene12
Anatomical shape for optimal bone coverage
- After one year, a randomized, controlled study showed that significantly more partial knee patients would have the operation again compared to total knee patients.13
- A multi-center study demonstrated decreased morbidity and complications of PKA compared to TKA14
Proven2 and reproducible technique
- With Microplasty® Instrumentation8
Best-in-class continuous education program
- Providing in-person and virtual training opportunities
- 46% of patients would choose a PKR over a TKR when presented with the various risks and benefits of both options.15 This is significantly higher than the 10% of knee replacement patients who receive a PKR today.16
Less Opioid Usage
- A study showed that PKR patients require fewer narcotics following surgery, for a shorter duration of use, less refills, and have a lower likelihood of narcotic requirement at 4 weeks.17
Oxford Partial Knee with Microplasty Instrumentation Animation
Oxford Partial Knee Course Overview
- Data on file at Zimmer Biomet. Based on Market Analysis and Registry Data, gathered September 2017.
- Price, A. and Svard, U. A Second Decade Lifetable Survival Analysis of the Oxford Unicompartmental Knee Arthroplasty. Clin Orthop Relat Res. 2011 Jan;469(1): 174-9.
- Pandit et al. The clinical outcome of minimally invasive phase 3 Oxford unicompartmental knee arthroplasty. Bone Joint J 2015;97-B:1493–1500.
- Svard, U. and Price, A. Oxford Medial Unicompartmental Knee Arthroplasty. A Survival Analysis of an Independent Series. Journal of Bone and Joint Surgery. 83:191–194. 2001.
- Price, A. et al. Long-term Clinical Results of the Medial Oxford Unicompartmental Knee Arthroplasty. Clinical Orthopedics and Related Research. 435:171–180. 2005
- Kim, K.T. et al. A Prospective Analysis of Oxford Phase 3 Unicompartmental Knee Arthroplasty. Orthopedics. 30(5 Suppl): 15-18, 2007.
- Goodfellow, J. and O’Connor, J. The Mechanics of the Knee and Prosthesis Design. Journal of Bone and Joint Surgery (Br). 60(3):358–69, 1978.
- Hurst JM et al. Radiographic Comparison of Mobile- Bearing Partial Knee Single-Peg versus Twin-Peg Design. The Journal of Arthroplasty. 30(3): 475-478. 2015.
- Berend, K, et al. New Instrumentation Reduces Operative Time in Medial Unicompartmental Knee Arthroplasty Using the Oxford Mobile Bearing Design. JISRF. Reconstructive Review. Vol. 5, No. 4, December 2015.
- Koh IJ, et al. Are the Oxford medial unicompartmental knee arthroplasty new instruments reducing the bearing dislocation risk while improving components relationships? A case control study. Orthop Traumatol Surg Res (2016).
- Tu, Yihui, et al. "Superior femoral component alignment can be achieved with Oxford microplasty instrumentation after minimally invasive unicompartmental knee arthroplasty." Knee Surgery, Sports Traumatology, Arthroscopy (2016): 1-7.
- Psychoyios, V., et al. Wear of Congruent Meniscal Bearings in Unicompartmental Knee Arthroplasty. Journal of Bone and Joint Surgery (Br). 80 B: 876-82, 1998.
- Beard D, Price A, Davies L, et al. A Multicentre Randomised Study Comparing Total or Partial Knee Replacement – One Year Results of The Topkat Trial. BASK. Liverpool, UK 2016.
- Brown, N.M., et al. Total Knee Arthroplasty Has Higher Postoperative Morbidity Than Unicompartmental Knee Arthroplasty: A Multicenter Analysis. The Journal of Arthroplasty. (2012) 86:90.
- Hutyra, C.A., et al. Patient Preferences for Surgical Treatment of Knee Osteoarthritis. J Bone Joint Surg Am. 2020;102:2022-31
- UK National Joint Registry Report. 2020.
- Dattilo, JR. et al. Narcotic Consumption in Opioid Naïve Patients Undergoing Unicompartmental and Total Knee Arthroplasty. The Journal of Arthroplasty 35 (2020) 2022-2026.
- Fox, D. (2012) Oxford Fixed Lateral Tibia - Lateral Tibial Plateau Profile Mapping Study Report. [Unpublished report]
The Oxford Partial Knee is intended for use in individuals with osteoarthritis or avascular necrosis limited to the medial compartment of the knee and is intended to be implanted with bone cement. The Oxford Partial Knee is not indicated for use in the lateral compartment or for patients with ligament deficiency. Potential risks include, but are not limited to, loosening, dislocation, fracture, wear and infection, any of which can require additional surgery.
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