Use Quantitative Microradiography to Predict the Periprosthetic Bone Loss in Distal Femur After Total Knee Arthroplasty
Use Quantitative Microradiography to Predict the Periprosthetic Bone Loss in Distal Femur After Total Knee Arthroplasty
The investigators hypothesized that the microarchitecture of bone influence the degree of
 periprosthetic bone loss after total knee arthroplasty surgery. The investigators collected
 the bone fragment at the distal femur while performing total knee replacement and take
 quantitative radiography analysis . Before and after the surgery(6 month ,12 month) , the
 investigators check the BMD at identical location of the distal femur by using dual energy
 absorptiometry. The investigators will use linear regression to evaluate the relationship
 between the microarchitecture and the degree of bone loss.
Inclusion Criteria:

 -  severe knee osteoarthritis

 -  post menopausal women

 Exclusion Criteria:

 -  immune disease

 -  end stage of renal disease who receive dialysis

 -  history of fracture at ipsilateral distal femur