this study evaluates changes in knee phenotype after total hip arthroplasty using radiographic assessment of coronal alignment in a prospective cohort of patients

this prospective cohort study evaluates the effect of total hip arthroplasty on knee phenotype using pre and post operative full-length radiographic assessment coronal alignment parameters will be measured to assess changes in knee biomechanics following THA

Inclusion Criteria:

• patients scheduled for primary unilateral total hip arthroplasty
• patient with hip joint pathology indicated for THA ( osteoarthritis )
• ability to provide informed consent
• availability for pre and post- operative radiographic follow-up

Exclusion Criteria:

• refusal to participate or withdraw consent
• incomplete radiographic data or loss to follow up
• previous surgery on the ipsilateral hip or knee
• patients with neuromuscular disorders affecting alignment

the study population will include any patient undergoing primary unilateral total hip arthroplasty for hip joint pathology .patient will be recruited consecutively from the orthopedic surgery department . all eligible patients will be assessed preoperatively and followed postoperatively with full length lower limb radiographs to evaluate changes in knee phenotype and coronal alignment