Comparison Between Brainlab Knee 3 Computer-assisted Navigation Systems and Conventional Instruments in TKA: a Prospective Cohort Study.

This is a a prospective cohort study. According to the inclusion criteria, volunteers were recruited from patients undergoing total knee arthroplasty. The patients are devided into two groups: the conventional TKA,the computer-assisted surgery(CAS) using Brainlab Knee 3 system.The differences of postoperative alignment,operative time,blood loss will be studied between the two groups.Clinical and functional evaluation using the scoring system of HSS(Hospital for Special Surgery) score, Western Ontario and McMaster University osteoarthritis index (WOMAC), Forgotten joint score(FJS-12) will be compared between the 2 groups,after surgery, and at the follow-up of 3 months、6 months and 12 months.