Objective To evaluate the postoperative prosthesis position of the medial compartment osteo-arthritis patients who underwent the Oxford unicompartmental knee arthroplasty using X-ray and three-dimensional CT images. To explain the advantage and feasibility of the measurement of postoperative prosthesis position by three-dimensional CT images reconstruction techniques. Methods A retrospective analysis was conducted on 28 patients(32 knees) who underwent Oxford Phase 3 unicompartmental knee arthroplasty for t...