Gait difference between PS prosthesis and CR prosthesis after total knee arthroplasty: a randomized controlled trial

INTERVENTION: 1:the posterior cmciate ligament retaining prosthesis;2:the posterior stabilized prosthesis; CONDITION: knee osteoarthritis PRIMARY OUTCOME: Gait analysis (stride length, stride frequency, flexion and extension range, etc.);bleeding volume;AKSS score;Postoperative ROM; INCLUSION CRITERIA: (1) accept primary total knee arthroplasty with a rotating platform prosthesis; (2) have complete follow‐up data and being willing to accept follow‐up; (3) aged 40 to 90 years; (4) preoperative diagnosis was degenerative knee osteoarthritis, rheumatoid arthritis, traumatic arthritis; (5) the operation was performed by the same senior chief physician; (6) the prosthesis was fixed by bone cement.