ARE LOWER-LIMB ALIGNMENT VALUES ON CT SCANOGRAMS COMPARABLE WITH WEIGHTBEARING LONG LEG RADIOGRAPHS IN PRE- AND POST-OPERATIVE PATIENTS UNDERGOING TOTAL KNEE REPLACEMENT?

Background: The lower limb mechanical axis has long been seen as a key to success in lower limb surgery, including knee arthroplasty. Traditionally, coronal alignment has been assessed with weight-bearing lower limb radiographs (LLR) allowing assessment of hip-knee-ankle alignment. More recently CT scanograms (CTS) have been advocated as a possible alternative, having the potential benefits of being quicker, cheaper, requiring less specialist equipment and being non-weightbearing.