Justinas Stučinskas, Mindaugas Bakevičius, Aleksej Lebedev, Otto Robertsson, Alfredas Smailys, Šarūnas Tarasevičius
Malalignment of the components affects long term total knee arthroplasty (TKA) survival. One of the options for achieving better TKA alignment may be a detailed preoperative radiological assessment.
The aim of the study – to investigate the femoral valgus angle variations and affecting factors in patients with knee osteoarthritis (OA).
Material and methods: We prospectively investigated severe OA patients, admitted for elective TKA. The standardized radiological assessment was performed – long standing hip-knee- ankle radiographs and the measurements were taken. We evaluated the relationship between the patients’, radiological parameters and femoral valgus angle.
Results: 110 patients were included in the study and the mean measured femoral valgus angle was 6,7±1,3° and ranged from 4° to 10°. It was not significantly different between genders or varus/ valgus knee deformation. There was a significant relation between femoral valgus angle and neck-shaft, femoral bowing angles. Femoral valgus angle significantly increased with larger femoral bowing and smaller neck-shaft angles.
Conclusions: Lithuanian patients with knee OA scheduled for TKA had a mean femoral valgus angle of 6,7±1,3° which ranged from 4° to 10°. Femoral neck-shaft and bowing angles significantly affects the femoral valgus angle.
Keyword(s): femur; knee joint; osteoarthritis; arthroplasty
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