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Midterm results of a new personalized knee implant for total knee arthroplasty: implant survivorship and patient-reported outcome after five years’ follow-up

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Abstract

Purpose

The Persona® system is a newly launched implant designed for total knee arthroplasty (TKA) with technical innovations intended for a better functional outcome and higher flexion range. The aim of this study is to evaluate midterm outcomes and survivorship of a cohort of patients with a minimum of 5-year follow-up and to confirm previous results described in the literature.

Methods

A cohort of 91 knees (85 patients) that underwent a patella-preserving TKA with the Persona® implant and who were followed for a mean of 5.9 years’ period was included in the study. Functional values were measured: Oxford Knee Score (OKS), Knee Society Knee score (KSKS) and Knee Society Function score (KSFS). Range of movement (ROM), lower limb axis correction, mobilization and complications were also registered at the last follow-up and underwent statistical analysis.

Results

We found a low rate of complications or radiological changes with an implant-related revision rate of 2.19%. Mean results for PROMS were 44.21 ± 4 in OKS, 90.94 ± 2.4 in KSS and 97.88 ± 9.6 in KSFS. Mean postoperative ROM was 120.8º ± 12.37º. There was no change in implant positions at the final follow-up. We found radiolucent lines in 3 knees (3.29%).

Conclusion

At a mean follow-up of 5.9 years, the implant-related cumulative percentage revision rate was 3.3% (2 of 91) at a mean follow-up of 5.9 years, with good clinical and functional results.

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Correspondence to Cristina Dauder Gallego.

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Conflict of interest

The author Javier Martínez is a consultant surgeon for Zimer Biomet (Warsaw, Indiana, USA). Despite this, there is no other conflict of interest among authors.

Ethical approval

Ethical approval was waived by the local Ethics Committee of Fundación Alcorcón University Hospital in view of the retrospective nature of the study and all the procedures being performed were part of the routine care.

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Dauder Gallego, C., Moreno Fenoll, I.B., Patiño Contreras, J.L. et al. Midterm results of a new personalized knee implant for total knee arthroplasty: implant survivorship and patient-reported outcome after five years’ follow-up. Eur J Orthop Surg Traumatol 32, 257–262 (2022). https://doi.org/10.1007/s00590-021-02959-5

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  • DOI: https://doi.org/10.1007/s00590-021-02959-5

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