Promising early outcomes of a novel anatomic knee system

Purpose The primary aim of this study was to report the early clinical and radiographic outcomes of patients who have been treated with total knee arthroplasty (TKA) using the Persona knee system. The secondary aim was to compare patient-reported outcomes (PROs) of the Persona knee system to those o...

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Bibliographic Details
Published in:Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA sports traumatology, arthroscopy : official journal of the ESSKA, 2019-04, Vol.27 (4), p.1067-1074
Main Authors: Galea, Vincent P., Botros, Mina A., Madanat, Rami, Nielsen, Christian S., Bragdon, Charles
Format: Article
Language:English
Subjects:
Arthroplasty (knee)
Biomedical materials
Complications
Confidence intervals
Femur
Joint surgery
Knee
Mechanical failure
Medicine
Medicine & Public Health
Orthopedics
Patients
Radiographs
Radiography
Surgical implants
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Summary:Purpose The primary aim of this study was to report the early clinical and radiographic outcomes of patients who have been treated with total knee arthroplasty (TKA) using the Persona knee system. The secondary aim was to compare patient-reported outcomes (PROs) of the Persona knee system to those of the NexGen implant. Methods A registry-based study of a consecutive series of 112 patients (129 knees) treated with the Persona knee system from a single center was conducted. Preoperative, 1-year, and 2-year radiographs and PROs were analyzed. Postoperative radiographs were assessed for radiolucency and component positioning. Patients were monitored for postoperative complications and revision. Two-year PROs were compared to a 1:1 propensity score-matched cohort of patients treated with the NexGen knee system. Results Ninety-five percent of knees were within literature-defined safe ranges of the anatomical tibiofemoral axis, tibial varus/valgus angle, femoral flexion/extension angle, and tibial slope. Radiolucency was observed in 0.9% and 1.3% of knees at one and 2 years, respectively. Two-year PRO values demonstrated clinically meaningful improvements from the preoperative values. The cumulative 2-year percent revision was 3.0% (95% confidence interval 1.9–3.8%); there were no revisions due to implant mechanical failure. Patients treated with the Persona knee system had higher KOOS symptom ( p  = 0.037) and KOOS QOL ( p  
ISSN:0942-2056
1433-7347
DOI:10.1007/s00167-018-5248-0