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Mid-term results of an anatomic total knee replacement design

  • Knee Arthroplasty
  • Published:
Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Introduction

A significant proportion of patients remain dissatisfied following total knee arthroplasty (TKA) surgery. Reasons for this are unclear. Contemporary implants seek to mirror innate anatomy. Such innovations are necessarily subject to scrutiny to validate their use. The Zimmer-Biomet Persona® Personalized Knee system is such an anatomic TKA. This work seeks to establish medium term survival data and patient reported outcomes for this implant.

Methods

This was a cohort study of prospectively collected data on all patients undergoing Persona TKA at our institution. Patients were managed using a standardised protocol for intra- and post-operative care. Survivorship data were collected using our National Joint Registry and corroborated with local data. Range of motion, Oxford Knee Score (OKS) and patient satisfaction were recorded at six weeks and one year post-operatively. Hip-knee-ankle radiographs were used to record pre- and post-operative alignment.

Results

Data were collected for 749 knees in 679 patients. Overall survivorship was 99.0% at a mean 5.35 years, with seven patients undergoing revision surgery during the study period. Significant improvements in the OKS (mean 20.7 points) and range of motion were observed (mean 104.6° at one year). 94.9% of patients were satisfied at one year. Mean correction was to a mechanical femoro-tibial angle of 0.8° varus.

Conclusions

We demonstrate excellent medium term survival of the Persona TKA in this large cohort, coupled with improvements in patient reported outcomes, range of motion and patient satisfaction at one year which compare favourably to other implants.

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Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. Department of Orthopaedics, Golden Jubilee University National Hospital, Agamemnon Street, Clydebank, Glasgow, G81 4DY, UK

    Fahd Mahmood, Fraser Rae, Sophie Rae, Alistair Ewen, Nicholas Holloway & Jon Clarke

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  1. Fahd Mahmood
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  2. Fraser Rae
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  3. Sophie Rae
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  4. Alistair Ewen
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  5. Nicholas Holloway
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Corresponding author

Correspondence to Fahd Mahmood.

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Competing interests

Declaration of interests: JC reports research support from Zimmer Biomet as a Chief Investigator and research support from Mathys as a Principal Investigator. JC is a paid consultant for Zimmer-Biomet. All other authors have no declaration of interests.

Ethical approval

As the study did not deviate from routine clinical practice, in line with our hospital protocol, no additional consent or ethical approval was required, excepting that regularly acquired for routine arthroplasty.

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Mahmood, F., Rae, F., Rae, S. et al. Mid-term results of an anatomic total knee replacement design. Arch Orthop Trauma Surg 144, 2239–2247 (2024). https://doi.org/10.1007/s00402-024-05246-0

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  • DOI: https://doi.org/10.1007/s00402-024-05246-0

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