Oxford® PKR: Post-op Leg Alignment Shown Not to Influence Survivorship at 10 years

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A recent article from J.A. Kennedy, MBBS, MRCS, et al.,1 recorded 891 partial knee replacements for cemented minimally invasive Oxford medial mobile-bearing Phase 3 (MIS Oxford PH3) implants performed in 818 patients.

This study showed that the surgical approach provides good functional outcomes and high implant survival rates. At 5 years, there was no significant relationship between post-op leg alignment and OKS. At 10 years, there was a positive relationship between increasing varus and better OKS.

The mean follow-up for patients was about 10 years from June of 1998 through March of 2009. This study included patients with anteromedial osteoarthritis and spontaneous osteonecrosis, but the implants experienced no failures due to wear and there was no loosening rate related to the limb alignment. The results showed an average 93.3% survival rate after twelve years for the marked varus group (8% of cohort), 93.2% in the mild varus group (35% of cohort), and 93.6% in the neutral group (57% of cohort).

To read more about the clinical results of the Oxford partial knee click here.

  1. J.A. Kennedy, et al.l Functional Outcome and Revision Rate Are Independent of Limb Alignment Following Oxford Medial Unicompartmental Knee Replacement. J Bone Joint Surg Am. 2019;101:270-5.