| Objective:To investigate the short-term clinical outcome of the OrthoPilot computer assisted navigation for total knee arthroplasty(TKA)by comparing with conventional operation.Methods:We retrospectively compared the results of 40 consecutive total knee arthroplasties with OrthoPilot computer assisted navigation system and 40 conventional total knee arthroplasties performed during the same period.The average age and preoperative diagnosis of navigation group showed no significant difference from the conventional group.The duration of operation,length of incision,intraoperative blood loss,were analyzed as perioperative result,and postoperative lower limb alignment(assessed with HKA angle)were compared between the two groups.All patients were followed up for 6 to 15 months with an average of 9.4 months,and HSS scores were acquired to explain the short-term clinical outcome of the two groups.Results:The deviation of coronal alignment in the navigation group(0.75±0.93)°was significantly lower than that in the conventional group(2.45±1.62)°with significant difference.The average operation duration and the length of incision for the navigation group was longer than conventional group with significant difference.There was no significant difference found in the Intraoperative hemorrhage and hemoglobin drop between the two groups.Our follow-up study showed higher HSS score in navigational group for 3-month and 6-month postoperatively,while no significant difference in the 3-days postoperative VAS score between the two groups was found,so it was in 3-day and 1month HSS score.No serious early postoperative complications like periprosthetic joint infection,and pulmonary embolism occurred in both groups.Conclusions:Computer assisted navigation system can provide more reliable and reproducible accuracy in postoperative alignment for total knee arthroplasty,as well as better clinical outcome,but the operation duration and length of the incision were relatively prolonged. |
PDF Full Text Request