In vitro analysis of varus-valgus laxity of the knee joint: Comparison of clinical evaluation with measurements using a reference motion analysis system

Testa, Rodolphe; Chouteau, Julien; Philippot, Rémi; Chèze, Laurence; Fessy, Michel‐Henri; Moyen, B.

doi:10.1016/j.irbm.2010.10.005

Cited by 5 publications

(1 citation statement)

References 37 publications

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“…Whereas this was also shown by Shultz et al [24], our work additionally stresses the importance of assuring that the knee flexion angles are similar when making such comparison and even more, muscular attribution can alter the laxity. Clinicians should, however, keep in mind that manual stress testing remains subject to a variability in excess of the presented results, given that the applied forces are oftentimes not quantified [25]. Third, the mediolateral difference in anteroposterior stability stresses the need for asymmetrical implant designs in total knee arthroplasty.…”

Section: Discussionmentioning

confidence: 99%

The contralateral knee is a good predictor for determining normal knee stability: a cadaveric study

Arnout

Verstraete

Victor

et al. 2021

Knee Surg Sports Traumatol Arthrosc

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PurposeThe goal is to evaluate contralateral knee joint laxity and ascertain whether or not contralateral symmetry is observable. Secondary, a validation of a knee laxity testing rig is provided. MethodsSeven pairs of cadaveric knee specimens have been tested under passive conditions with and without external loads, involving a varus/valgus and an external/internal rotational torque and an anteroposterior shear force. ResultsThrough the range of motion, the width of the varus/valgus laxity, internal/external laxity and anterior/posterior laxity for the medial and lateral compartment show no significant differences between left and right leg. These findings allow us to validate the setup, especially for relative values of laxity based on anatomical measures and knee joint biomechanics. ConclusionA multidirectional laxity symmetry has been demonstrated for the intact knee and its contralateral knee in passive conditions as in an anesthetized patient. The passive laxity evaluation setup has been validated. Our work furthermore demonstrated a pronounced difference in anteroposterior mobility between the medial and lateral compartment of the knee, with a more stable medial side and more mobile lateral side. Clinical relevanceThe contralateral knee can be used as reference for determining optimal knee laxity peri‐operatively in total knee replacement and ligament reconstruction. Level of evidenceLevel IV, Case series

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Section: Discussionmentioning

confidence: 99%