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German Congress of Orthopedic and Trauma Surgery (DKOU 2018)

23.10. - 26.10.2018, Berlin

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Bicruciate-retaining implants provide reduced joint-awareness after total knee arthroplasty

Meeting Abstract

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  • presenting/speaker Florian Baumann - Universitätsklinikum Regensburg, Klinik und Poliklinik für Unfallchirurgie, Regensburg, Germany
  • Paul Schmitz - Universitätsklinik Regensburg, Klinik und Poliklinik für Unfallchirurgie, Regensburg, Germany
  • Werner Krutsch - Universitätsklinikum Regensburg, Klinik und Poliklinik für Unfallchirurgie, Regensburg, Germany
  • Johannes Zellner - Universitätsklinikum Regensburg, Klinik und Poliklinik für Unfallchirurgie, Regensburg, Germany
  • Carsten Tibesku - KniePraxis.Bayern, Straubing, Germany
  • Michael Nerlich - Universitätsklinikum Regensburg, Klinik und Poliklinik für Unfallchirurgie, Regensburg, Germany
  • Michael Worlicek - Universitätsklinikum Regensburg, Klinik und Poliklinik für Unfallchirurgie, Regensburg, Germany

Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2018). Berlin, 23.-26.10.2018. Düsseldorf: German Medical Science GMS Publishing House; 2018. DocST14-86

doi: 10.3205/18dkou030, urn:nbn:de:0183-18dkou0306

Published: November 6, 2018

© 2018 Baumann et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. See license information at http://creativecommons.org/licenses/by/4.0/.

Outline

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Objectives: There is rising impact of patient-reported outcome (PRO) measurement in joint arthroplasty over the past years. Bicruciate-retaining implants have shown more physiologic knee kinematics and provide superior proprioceptive capacities. The aim of this study was to evaluate if the functional properties of this new implant design lead to improved PRO results after total knee arthroplasty (TKA).

Methods: This prospective, controlled trial compares PRO of bicruciate-retaining total knee arthroplasty (BCR-TKA) to unicondylar knee arthroplasty (UKA) and standard posterior-stabilized total knee arthroplasty (PS-TKA). We evaluated 102 patients (34 patients in each group) 18 months postoperatively after knee arthroplasty. Primary outcome measure was the Forgotten Joint Score (FJS).

Results and conclusion: The BCR-group showed the same level of joint awareness as the UKA-group (p=0.999). The second control group of PS-TKA patients had a lower mean score value in the FJS compared to the BCR-group (p=0.035) and UKA-group (p=0.031) (Table 1 [Tab. 1]).

There was no correlation of age, gender, body mass index (BMI) and the FJS. No relevant floor- or ceiling effects occurred.

This study found reduced joint awareness for BCR-TKA compared to a standard total knee arthroplasty. Further prospective, randomized studies to investigate long-term survivorship of bicruciate-retaining implants are needed.