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http://hdl.handle.net/1942/33006
Title: | Muscle loaded stability reflects ligament-based stability in TKA: a cadaveric study | Authors: | Arnout, Nele Victor, Jan Chevalier, Amelie BELLEMANS, Johan Verstraete, Matthias A. |
Issue Date: | 2020 | Publisher: | SPRINGER | Source: | KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY, 30(2), p. 612-620 | Abstract: | Purpose This paper aims at evaluating the effects of muscle load on knee kinematics and stability after TKA and second at evaluating the effect of TKA surgery on knee kinematics and stability; and third, at correlating the stability in passive conditions and the stability in active, muscle loaded conditions. Methods Fourteen fresh frozen cadaveric knee specimens were tested under passive and active condition with and without external loads involving a varus/valgus and internal/external rotational torque before and after TKA surgery using two in-house developed and previously validated test setups. Results Introduction of muscle force resulted in increased valgus (0.98 degrees) and internal rotation of the femur (4.64 degrees). TKA surgery also affected the neutral path kinematics, resulting in more varus (1.25 degrees) and external rotation of the femur (5.22 degrees). All laxities were significantly reduced by the introduction of the muscle load and after implantation of the TKA. The presence of the implant significantly affects the active varus/valgus laxity. This contrasts with the rotational laxity, in which case the passive laxity is the main determinant for the active laxity. For the varus/valgus laxity, the passive laxity is also a significant predictor of the active laxity. Conclusion Knee stability is clearly affected by the presence of muscle load. This points to the relevance of appropriate rehabilitation with focus on avoiding muscular atrophy. At the same time, the functional, muscle loaded stability strongly relates to the passive, ligament-based stability. It remains therefore important to assess knee stability at the time of surgery, since the passive laxity is the only predictor for functional stability in the operating theatre. | Notes: | Arnout, N (corresponding author), Univ Hosp Ghent, Corneel Heymanslaan 10, B-9000 Ghent, Belgium.; Arnout, N (corresponding author), Univ Ghent, Dept Med, Ghent, Belgium. nelearnout@yahoo.com |
Other: | Arnout, N (corresponding author), Univ Hosp Ghent, Corneel Heymanslaan 10, B-9000 Ghent, Belgium; Univ Ghent, Dept Med, Ghent, Belgium. nelearnout@yahoo.com | Keywords: | Knee stability;Laxity;Muscles;In vitro;Total knee replacement | Document URI: | http://hdl.handle.net/1942/33006 | ISSN: | 0942-2056 | e-ISSN: | 1433-7347 | DOI: | 10.1007/s00167-020-06329-2 | ISI #: | WOS:000587957800008 | Rights: | European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2020 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2021 |
Appears in Collections: | Research publications |
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s00167-020-06329-2.pdf Restricted Access | Published version | 1.06 MB | Adobe PDF | View/Open Request a copy |
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