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a) Pre- and b) postoperative long-leg standing radiographs showing correction of hip-knee-ankle angle (HKAA), while the obliquity of the joint line is maintained, following bi-unicompartmental knee arthroplasty. c) Pre- and d) postoperative long-leg standing radiographs showing correction of HKAA and alteration of the obliquity of the joint line following total knee arthroplasty.
