Clinical Studies Show Oxford® Microplasty® Instrumentation to be Reproducible, with Shorter OR Time and Reduced Risk of Dislocation1-4


The study showed that Microplasty instrumentation also resulted in a greater number of 3 mm and 4 mm bearings being implanted (92% vs. 84%; p=0.001)1 compared to Phase 3 Instrumentation, which Pandit, H. et al demonstrated has better survivorship than 5 mm bearings and thicker.2

A further study by Berend, K. et al. found a reduction in OR time of almost 9 minutes when using Microplasty Instrumentation compared to Phase 3 Instrumentation.3

Furthermore, Koh, et al. showed that Oxford Microplasty instrumentation reduced the risk of dislocation compared to Phase 3 Instrumentation.4

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  1. 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.
  2. Pandit, H., et al. The Clinical Outcome of Minimally Invasive Phase 3 Oxford Unicompartmental Knee Arthroplasty: A 15 Year Follow Up of 1000 UKAs. Bone Joint J. 2015 Nov;97-B(11):1493-500
  3. 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.
  4. 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),
In the United States (US), 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; it 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. For complete prescribing information, see the package insert and
Various countries outside of the US offer Oxford partial knees intended for lateral use and Oxford Partial Knees with cementless application; these devices are not available for sale in the US. Check for local product clearances and reference product specific instructions for use.