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The Oxford® Partial Knee has been clinically tested for over 40 years and is the most widely used partial knee in the world1. The existing design inherits the clinical results of the phase I and II implants which have now reached 20-year survivorship2.

Important results that highlight the success and reliability of the Oxford Partial Knee include:

  • Survivorship of 92.3% to 94% at 15 years2-4
  • Survivorship of 91.0% at 20 years2
  • Return to Function
    • Quicker recovery than TKA, using a rapid recovery protocol5
    • More likely to return to low-impact sport (swimming, cycling, hiking and golf) than TKA6
  • More natural motion in mobile vs fixed partial knees, with closer approximation to normal knee kinematics7
  • A reproducible technique with Microplasty® Instrumentation8

Sources

Type
(NJR, Publications etc.)

N

Survivorship

Bergeson, AG et al. Medial mobile bearing unicompartmental knee arthroplasty early survivorship and analysis of failures in 1000 consecutive cases. Journal of Arthroplasty. 2013 9

Publication

1,000 knees

95.2% at a mean of 44 months

Carr, A. et al. Medial Unicompartmental Arthroplasty: A Survival Study of the Oxford Meniscal Knee. Clinical Orthopedics and Related Research. 295:205-213. 1993.10

Publication

121 knees

99.1% at 9 years (cumulative survivorship)

Jones, L et al. 10 year survivorship of the medial Oxford unicompartmental knee arthroplasty. A 1000 patient non-designer series- the effect of surgical grade and supervision. Osteoarthritis and Cartilage. 2012;20:S290-S291 11

Publication

1,085 knees

91% at 10 years (cumulative survival)

Keys GW, Ul-Abiddin Z, Toh EM. Analysis of first forty Oxford medial unicompartmental knee replacements from a small district hospital in UK. Knee. 2004; 11:375-377.12

Publication

40 knees

100% at a mean of 7.5 years

Lim, H et al. Oxford phase 3 unicompartmental knee replacement in Korean patients. Journal of Bone Joint Surgery. 94-B(8).2012.13

Publication

400 knees

94% at 10 years (cumulative survival)

Sports Traumatol Arthrosc. 2011; 19:277-84 (Biomet Author)14

Publication

244 knees

94.4% at 7 years (cumulative survival)

Lombardi, AV et al. Is recovery faster for mobile-bearing unicompartmental than total knee arthroplasty? Clin Orthop Relat Res. 2009 Jun;467(6):1450-7 5

Publication

115 knees

94% at a mean of 30 months

Matharu, G et al. The Oxford medial unicompartmental knee replacement: survival and the effect of age and gender. The Knee. 2012: 913-917 15

Publication

459 knees

93% at 8 years (cumulative survival)

Murray, DW et al. The Oxford medial unicompartmental arthroplasty: a ten-year survival study. Journal of Bone and Joint Surgery. 1998;80-B:983-989 16

Publication

143 knees

98% at 10 years (cumulative survival)

Pandit, H et al. Minimally invasive Oxford phase 3 unicompartmental knee replacement. Results of 1000 cases. J Bone Joint Surg Br. 2011;93-B:198-204 17

Publication

1,000 knees

96% at 10 years (cumulative survival)

Price AJ, Waite JC, Svard U. Long-term clinical results of the medial Oxford unicompartmental knee arthroplasty. Clin Orthop Relat Res. 2005; 435:171-180 3

Publication

439 knees

93% at 15 years (cumulative survival)

Price, AJ and Svard, U. A second decade lifetable survival analysis of the Oxford unicompartmental knee arthroplasty. Clin Orthop Relat Res. 2011;469:174-179 2

Publication

682 knees

91.0% at 20 years (cumulative survival)

Rajasekhar C, Das S, Smith A. Unicompartmental knee arthroplasty. 2- to 12-year results in a community hospital. J Bone Joint Surg Br. 2004; 86:983-985.18

Publication

135 knees

94.04% at 10 years (cumulative survival)

Svard UC, Price AJ. Oxford medial unicompartmental knee arthroplasty. A survival analysis of an independent series. Journal of Bone and Joint Surgery Br. 83:191-94. 2001.3

Publication

124 knees

95.0% at 10 years (cumulative survival)

White, Stephen H., Sharon Roberts, and Peter W. Jones., The twin peg Oxford partial knee replacement: the first 100 cases. The Knee 19(1) 36-40. 2012.19

Publication

100 patients

100% at 2 years (cumulative survival)

Yoshida, Kenjiro, et al. Oxford Phase 3 Unicompartmental Knee Arthroplasty in Japan - Clinical Results in Greater Than One Thousand Cases Over Ten Years. The Journal of Arthroplasty 28(9) 168-171.2013.20

Publication

1,279 knees

95% at 10 years (cumulative survival)

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Additional Information

References

  1. Data on file  at Zimmer Biomet. Based on Market Analysis and Registry Data, gathered September 2017.
  2. Price AJ, Svard U.: A second decade lifetable survival analysis of the Oxford unicompartmental knee arthroplasty. Clin Orthop Relat Res. 2011 Jan;469(1): 174-9.
  3. Svard, U. and Price, A. Oxford Medial 1. Unicompartmental Knee Arthroplasty. A Survival Analysis of an Independent Series. Journal of Bone and Joint Surgery Br. 83:191 194. 2001.
  4. Price, A. et al. Long-term Clinical Results of the Medial Oxford Unicompartmental Knee Arthroplasty. Clinical Orthopedics and Related Research. 435:171 180. 2005
  5. Lombardi, A. et al. Is Recovery Faster for Mobile-bearing Unicompartmental than Total Knee Arthroplasty? Clinical Orthopedics and Related Research. 467:1450-57. 2009.
  6. Walton, NP. et al. Patient-Perceived Outcomes and Return to Sport and Work: TKA Versus Mini-Incision Unicompartmental Knee Arthroplasty. J Knee Surg. 2006;19:112-116.
  7. Ming, GL et al. Mobile vs. fixed bearing unicondylar knee arthroplasty: A randomized study on short term clinical outcomes and knee kinematics. The Knee. (2006): 365-370.
  8. 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.
  9. Bergeson, AG et al. Medial mobile bearing unicompartmental knee arthroplasty early survivorship and analysis of failures in 1000 consecutive cases. Journal of Arthroplasty. 2013
  10. Carr, A. et al. Medial Unicompartmental Arthroplasty: A Survival Study of the Oxford Meniscal Knee. Clinical Orthopedics and Related Research. 295:205 213. 1993.
  11. Jones, L et al. 10 year survivorship of the medial oxford unicompartmental knee arthroplasty. A 1000 patient non-designer series- the effect of surgical grade and supervision. Osteoarthritis and Cartilage. 2012;20:S290-S291
  12. Keys GW, Ul-Abiddin Z, Toh EM. Analysis of first forty Oxford medial unicompartmental knee replacements from a small district hospital in UK. Knee. 2004; 11:375-377.
  13. Lim, HC et al. Oxford phase 3 unicompartmental knee replacement in Korean patients. JBJS. 2012 Aug; 94-B(8)
  14. Sports Traumatol Arthrosc. 2011; 19:277-84 (Biomet Author)
  15. Matharu, G et al. The Oxford medial unicompartmental knee replacement: survival and the effect of age and gender. The Knee. 2012: 913-917
  16. Murray, DW et al. The Oxford medial unicompartmental arthroplasty: a ten-year survival study. Journal of Bone and Joint Surgery. 1998;80-B:983-989
  17. Pandit, H, et al: The Oxford medial unicompartmental knee replacement using a minimally-invasive approach. JBJS (BR), Jan 2006; 88B: 54-60.
  18. Rajasekhar C, Das S, Smith A. Unicompartmental knee arthroplasty. 2- to 12-year results in a community hospital. J Bone Joint Surg Br. 2004; 86:983-985.
  19. White, Stephen H., Sharon Roberts, and Peter W. Jones. The twin peg Oxford partial knee replacement: the first 100 cases. The Knee 19.1 (2012): 36-40.
  20. Yoshida, Kenjiro, et al. Oxford Phase 3 Unicompartmental Knee Arthroplasty in Japan - Clinical Results in Greater Than One Thousand Cases Over Ten Years. The Journal of arthroplasty 28.9 (2013): 168-171.