[article] 
inActa Orthopaedica Belgica > Vol. 86/3 (Septembre 2020) . - p. 440-446

Titre :	Coronal alignment in osteoarthritic knees, does it change in flexion?
Type de document :	texte imprimé
Auteurs :	Jef Neirynck, Auteur
Année de publication :	2020
Article en page(s) :	p. 440-446
Langues :	Anglais (eng)
Résumé :	Changes in coronal alignment in osteoarthritic knees evolving from extension to flexion remain poorly studied. Using an imageless computer-navigation system (Stryker©) we prospectively collected measurements of dynamic coronal pre-implant alignment during primary total knee arthroplasty. Coronal alignment of the osteoarthritic knee was determined at maxi- mal extension and 90° flexion. Measurements were subgrouped as varus (≤-3°), neutral (>-3°, <+3°) or valgus (≥+3°). Of 545 osteoarthritic knees (347 females), coronal alignment in extension was 261 (48%) varus, 197 (36%) neutral and 87 (16%) valgus. Varus extension alignment was more common in male versus female knees (p< .0001). Valgus ex- tension alignment was more common in female versus male knees (p= .002). In flexion, 174 (66%) of varus knees remained varus. Coronal alignment remained unchanged (within +3° ; -3°) in flexion versus extension in approximately half of the OA knees observed. This insight into a changing coronal deformity might contribute to a better understanding of osteoarthritic knee behaviour.
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[article] Coronal alignment in osteoarthritic knees, does it change in flexion? [texte imprimé] / Jef Neirynck, Auteur . - 2020 . - p. 440-446.
Langues : Anglais (eng)
in Acta Orthopaedica Belgica > Vol. 86/3 (Septembre 2020) . - p. 440-446

Résumé :

Changes in coronal alignment in osteoarthritic knees evolving from extension to flexion remain poorly studied. Using an imageless computer-navigation system (Stryker©) we prospectively collected measurements of dynamic coronal pre-implant alignment during primary total knee arthroplasty. Coronal alignment of the osteoarthritic knee was determined at maxi- mal extension and 90° flexion. Measurements were subgrouped as varus (≤-3°), neutral (>-3°, <+3°) or valgus (≥+3°). Of 545 osteoarthritic knees (347 females), coronal alignment in extension was 261 (48%) varus, 197 (36%) neutral and 87 (16%) valgus. Varus extension alignment was more common in male versus female knees (p< .0001). Valgus ex- tension alignment was more common in female versus male knees (p= .002). In flexion, 174 (66%) of varus knees remained varus. Coronal alignment remained unchanged (within +3° ; -3°) in flexion versus extension in approximately half of the OA knees observed. This insight into a changing coronal deformity might contribute to a better understanding of osteoarthritic knee behaviour.

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