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

• Published in: European journal of orthopaedic surgery & traumatology Vol. 32; no. 2; pp. 257 - 262
• Main Authors: Dauder Gallego, Cristina, Moreno Fenoll, Irene Blanca, Patiño Contreras, José Luis, Moreno Coronas, Francisco Javier, Torrejón de la Cal, María del Carmen, Martínez Martín, Javier
• Format: Journal Article
• Language: English
• Published: Paris Springer Paris 01.02.2022; Springer Nature B.V
• Subjects: Arthroplasty, Replacement, Knee - adverse effects; Follow-Up Studies; Humans; Joint replacement surgery; Joint surgery; Knee; Knee Joint - diagnostic imaging; Knee Joint - surgery; Knee Prosthesis; Medicine; Medicine & Public Health; Original Article; Patient Reported Outcome Measures; Range of Motion, Articular; Retrospective Studies; Surgical Orthopedics; Survivorship; Traumatic Surgery; Treatment Outcome; Personalized; Midterm follow-up; Total knee arthroplasty; Retrospective study; Survival rate; PROMs
• ISSN: 1633-8065; 1432-1068
• DOI: 10.1007/s00590-021-02959-5

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.