Up to 10 year follow-up of the Oxford Domed Lateral Partial Knee Replacement from an independent centre

Newman, Simon P.; Altuntas, Altay O; Alsop, Helen; Cobb, Justin P.

doi:10.1016/j.knee.2017.05.001

Cited by 30 publications

(25 citation statements)

References 22 publications

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“…These results were obtained by the designer surgeons, and may limit the generalisability of the results. However, other centres have reported similar results with similar dislocation rates 14,[25][26][27] . It is a single centre, single arm series with no comparator groups.…”

Section: Discussionsupporting

confidence: 66%

“…Despite the increased entrapment of the biconcave bearing decreasing the dislocation rate, at 4% in the designer's series, it is still unacceptably high. Other independent series report dislocation rates of 2%, 2%, 4% and 6% 14,[25][26][27] . The Fixed bearing Lateral Oxford (FLO; Zimmer Biomet, Warsaw, United States of America) tibial component was introduced, in part, to address this problem.…”

Section: Discussionmentioning

confidence: 92%

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Oxford domed lateral unicompartmental knee arthroplasty

Kennedy

Mohammad

Yang

et al. 2020

The Bone & Joint Journal

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Aims To report mid- to long-term results of Oxford mobile bearing domed lateral unicompartmental knee arthroplasty (UKA), and determine the effect of potential contraindications on outcome. Methods A total of 325 consecutive domed lateral UKAs undertaken for the recommended indications were included, and their functional and survival outcomes were assessed. The effects of age, weight, activity, and the presence of full-thickness erosions of cartilage in the patellofemoral joint on outcome were evaluated. Results Median follow-up was seven years (3 to 14), and mean age at surgery was 65 years (39 to 90). Median Oxford Knee Score (OKS) was 43 (interquartile range (IQR) 37 to 47), with 260 (80%) achieving a good or excellent score (OKS > 34). Revisions occurred in 34 (10%); 14 (4%) were for dislocation, of which 12 had no recurrence following insertion of a new bearing, and 12 (4%) were revised for medial osteoarthritis (OA). Ten-year survival was 85% (95% confidence interval (CI) 79 to 90, at risk 72). Age, weight, activity, and patellofemoral erosions did not have a significant effect on the clinical outcome or survival. Conclusion Domed lateral UKA provides a good alternative to total knee arthroplasty (TKA) in the management of lateral compartment OA. Although dislocation is relatively easy to treat successfully, the dislocation rate of 4% is high. It is recommended that the stability of the bearing is assessed intraoperatively. If the bearing can easily be displaced, the fixed rather than the mobile bearing version of the Oxford lateral tibial component should be inserted instead. Younger age, heavier weight, high activity, and patellofemoral erosions did not detrimentally affect outcome, so should not be considered contraindications. Cite this article: Bone Joint J 2020;102-B(8):1033–1040.

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Section: Discussionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 92%

Oxford domed lateral unicompartmental knee arthroplasty

Kennedy

Mohammad

Yang

et al. 2020

The Bone & Joint Journal

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“…The Lateral Domed Oxford UKR's bearing dislocation rate in our study was 2.3%, which is similar to other studies in the literature which report rates generally between 1.5-6% [12][13][14][15][16][17].…”

Section: Discussionsupporting

confidence: 90%

“…The introduction of this implant and improvements in the surgical technique reduced the rate of bearing dislocation to 1.7%, in the first report from the designer surgeons [12]. However subsequent reports from the designers and other centres have reported variable dislocation rates between 1.5% and 6%, with many being the result of trauma [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The Mid- to Long-Term Outcomes of the Lateral Domed Oxford Unicompartmental Knee Replacement: An Analysis From the National Joint Registry for England, Wales, Northern Ireland, and the Isle of Man

Mohammad

Matharu

Judge

et al. 2021

The Journal of Arthroplasty

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Background: Lateral unicompartmental knee replacement (UKR) is an alternative to total knee replacement for isolated lateral unicompartmental knee arthritis. The geometry and mechanics of the lateral compartment differ to the medial compartment with the Lateral Domed Oxford UKR designed to address this. We used National Joint Registry (NJR) data to report the mid to long term outcomes of this device. Methods:We performed a retrospective observational study using NJR data on 992 Lateral Domed Oxford UKRs implanted between 1 st January 2005 and 31 st December 2017.Outcomes of interest were implant survival and revision indications. Results:The 10 year cumulative implant survival rates were 88.6% (CI 85.3-91.2). When compared to <55 year age group, the 55-64, 65-74 and ≥75 groups had significantly lower revision rates (Hazard Ratio (HR)=0.56 (CI 0.32-0.98, p=0.04), HR 0.40 (CI 0.22-0.72, p=0.003) and HR 0.27 (CI 0.12-0.58, p=0.001) respectively). The obese group had significantly (p=0.04) increased revision risk compared to normal BMI (HR 2.33, CI 1.06-5.12). The commonest reasons for revision surgery were dislocation (n=23, 2.3%), pain (n=15, 1.5%) and aseptic loosening (n=14, 1.4%). Conclusion:The Lateral Domed Oxford UKR provides a good option for isolated lateral compartment osteoarthritis. However dislocation of the mobile bearing remains a problem, occurring in 2.3% of the patients and accounting for 30% of the revisions. To help prevent dislocation it is now possible to assess bearing stability intra-operatively and if very unstable to implant a compatible fixed bearing tibial component, without the need for further bone preparation.

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“…The optimal design for medial UKA continues to be debated [33,34], and probably the surgeon should choose the implant design that he/she is familiar with for bi-UKA. Especially, the reports of outcome after mobile-bearing lateral UKA have been diverse [35][36][37]. Pandit et al used the Oxford Domed Lateral for staged bi-UKA and reported that there were no significant surgery-related complications and that there was no need for any further surgical procedures or revisions [19].…”

Section: Implant Selectionmentioning

confidence: 99%

Clinical outcome of bi-unicompartmental knee arthroplasty for both medial and lateral femorotibial arthritis: a systematic review—is there proof of concept?

Wada

Price

Gromov

et al. 2020

Arch Orthop Trauma Surg

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Up to 10 year follow-up of the Oxford Domed Lateral Partial Knee Replacement from an independent centre

Cited by 30 publications

References 22 publications

Oxford domed lateral unicompartmental knee arthroplasty

Oxford domed lateral unicompartmental knee arthroplasty

The Mid- to Long-Term Outcomes of the Lateral Domed Oxford Unicompartmental Knee Replacement: An Analysis From the National Joint Registry for England, Wales, Northern Ireland, and the Isle of Man

Clinical outcome of bi-unicompartmental knee arthroplasty for both medial and lateral femorotibial arthritis: a systematic review—is there proof of concept?

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