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Radiographic
parameters for example tibiofemoral angle and mechanical axis angle for femur
and tibia can foretell the BMD distribution in advanced medial knee OA.
As per a piece of information recently published in the Journal of Orthopaedic Science, radiographic parameters such as tibiofemoral angle (TFA) and mechanical axis angle (MAA) for femur and tibia can predict BMD distribution around the knee without using dual-energy X-ray absorptiometry. Individuals with severe knee osteoarthritis (OA) present with altered bone mineral density (BMD) of the proximal tibia and distal femur.
Previously, the association between the radiographic parameters show OA progression and medial-to-lateral BMD (M/L-BMD) ratio was not known. This study focused on to evaluate this association within 182 knees of 156 patients with advanced medial knee OA who went through total knee arthroplasty. Various radiographic parameters such as tibial coronal angle, medial and lateral laxity, tibiofemoral angle (TFA), load-bearing axis deviation at the tibial plateau (%), mechanical axis angle (MAA), and tibiofemoral subluxation (%) were evaluated for femoral and tibial M/L-BMD ratios.
MAA and TFA showed positive association, whereas
load-bearing axis deviation and tibial coronal angle showed a negative
association with tibial and femoral M/L-BMD ratios. As per findings of
multivariate analyses, TFA and MAA showed considerable relationships with
femoral M/L-BMD ratio and tibial M/L-BMD ratio, respectively. These outcomes
contribute in vivo data on the assessment of preoperative tibial and femoral
M/L-BMD ratios without applying dual-energy X-ray absorptiometry.
Journal of Orthopaedic Science
Association between bone mineral density distribution and various radiographic parameters in patients with advanced medial osteoarthritis of the knee.
Yoshinori Ishii et al.
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