GUIDED MOTION TOTAL KNEE ARTHROPLASTY SYSTEM IN YOUNGER PATIENTS HAS A LOWER REVISION RATE THAN REGISTRY CONTROLS: RESULTS FROM THE INTERNATIONAL MULTICENTRE STUDY WITH UP TO SIX YEARS’ FOLLOW-UP

Harris A, Christen B, Malcorps J, et al. GUIDED MOTION TOTAL KNEE ARTHROPLASTY SYSTEM IN YOUNGER PATIENTS HAS A LOWER REVISION RATE THAN REGISTRY CONTROLS: RESULTS FROM THE INTERNATIONAL MULTICENTRE STUDY WITH UP TO SIX YEARS’ FOLLOW-UP. Orthop Procs. 2020;102-B(SUPP_1):96-96. doi:10.1302/1358-992X.2020.1.096

Harris, A., et al. “GUIDED MOTION TOTAL KNEE ARTHROPLASTY SYSTEM IN YOUNGER PATIENTS HAS A LOWER REVISION RATE THAN REGISTRY CONTROLS: RESULTS FROM THE INTERNATIONAL MULTICENTRE STUDY WITH UP TO SIX YEARS’ FOLLOW-UP.” Orthopaedic Proceedings, vol. 102-B, no. SUPP_1, 2020, pp. 96-96., https://doi.org/10.1302/1358-992X.2020.1.096

Harris, A., Christen, B., Malcorps, J., O'Grady, C., Sensiba, P., Vandenneucker, H., Huang, B., Cates, H., Hur, J., Marra, D., & Kopjar, B. (2020). GUIDED MOTION TOTAL KNEE ARTHROPLASTY SYSTEM IN YOUNGER PATIENTS HAS A LOWER REVISION RATE THAN REGISTRY CONTROLS: RESULTS FROM THE INTERNATIONAL MULTICENTRE STUDY WITH UP TO SIX YEARS’ FOLLOW-UP. Orthopaedic Proceedings, 102-B(SUPP_1), 96-96. https://doi.org/10.1302/1358-992X.2020.1.096

Harris, A., Christen, B., Malcorps, J., O'Grady, C., Sensiba, P., Vandenneucker, H. et al. (2020) “GUIDED MOTION TOTAL KNEE ARTHROPLASTY SYSTEM IN YOUNGER PATIENTS HAS A LOWER REVISION RATE THAN REGISTRY CONTROLS: RESULTS FROM THE INTERNATIONAL MULTICENTRE STUDY WITH UP TO SIX YEARS’ FOLLOW-UP.” Orthopaedic Proceedings, 102-B(SUPP_1), pp. 96-96. Available at: https://doi.org/10.1302/1358-992X.2020.1.096

Harris, A., B. Christen, J. Malcorps, C. O'Grady, P. Sensiba, H. Vandenneucker, B. Huang, et al. “GUIDED MOTION TOTAL KNEE ARTHROPLASTY SYSTEM IN YOUNGER PATIENTS HAS A LOWER REVISION RATE THAN REGISTRY CONTROLS: RESULTS FROM THE INTERNATIONAL MULTICENTRE STUDY WITH UP TO SIX YEARS’ FOLLOW-UP.” Orthopaedic Proceedings 102-B, no. SUPP_1 (2020): 96-96. https://doi.org/10.1302/1358-992X.2020.1.096

Harris A, Christen B, Malcorps J, O'Grady C, Sensiba P, Vandenneucker H, et al. GUIDED MOTION TOTAL KNEE ARTHROPLASTY SYSTEM IN YOUNGER PATIENTS HAS A LOWER REVISION RATE THAN REGISTRY CONTROLS: RESULTS FROM THE INTERNATIONAL MULTICENTRE STUDY WITH UP TO SIX YEARS’ FOLLOW-UP. Orthop Procs. 2020 Feb 1;102-B(SUPP_1):96-96. https://doi.org/10.1302/1358-992X.2020.1.096

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Abstract

Introduction

Patients ≤ 55 years have a high primary TKA revision rate compared to patients >55 years. Guided motion knee devices are commonly used in younger patients yet outcomes remain unknown.

Materials and Methods

In this sub-group analysis of a large multicenter study, 254 TKAs with a second-generation guided motion knee implant (Journey II Bi-Cruciate Stabilized Knee System, Smith & Nephew, Inc., Memphis) were performed between 2011–2017 in 202 patients ≤ 55 years at seven US and three European sites. Revision rates were compared with Australian Joint Registry (AOANJRR) 2017 data.

Results

Average age 49.7 (range 18–54); 56.4% females; average BMI 34 kg/m²; 67.1% obese; patellae resurfaced in 98.4%. Average follow-up 4.2 years; longest follow-up six years; 27.5% followed-up for ≥ five years. Of eight revisions: total revision (one), tibial plate replacements (three), tibial insert exchanges (four). One tibial plate revision re-revised to total revision. Revision indications were mechanical loosening (n=2), infection (n=3), peri-prosthetic fracture (n=1), and instability (n=2). The Kaplan-Meier revision estimate was 3.4% (95% C.I. 1.7% to 6.7%) at five years compared to AOANJRR rate of 6.9%. There was no differential risk by sex.