Clinical outcomes between PS and CR gradually reducing radius TKA: a randomized controlled trial

INTERVENTION: Experimental Procedure/Surgery,Experimental Procedure/Surgery Participants for the arm 1 will get the posterior stabilized Attune knee replacement system. ,Participants for the arm 2 will get the crucriate retaining Attune knee replacement system. PS,CR CONDITION: Advanced knee osteoarthritis treatment ; total knee arthroplasty ; gradually reducing radius; functional outcomes; posterior stabilized knee; crucriate retaining knee total knee arthroplasty ; gradually reducing radius; functional outcomes; posterior stabilized knee; crucriate retaining knee PRIMARY OUTCOME: pateint reported outcomes 3, 6, 12 months KOOS SECONDARY OUTCOME: knee motions 3, 6, 12 months ROM,post‐op pain dischage date VAS,length of hospital stay during admission days,adverse events within 12 months complication INCLUSION CRITERIA: 1. Patients with clinical and radiographic diagnosis of severe knee osteoarthritis (Kellgren and Lawrence grade IV) 2. Patients who placed on the waiting list for unilateral TKA