Precise and accurate analysis for RATKA in reconstruction of lower limb alignment
10.3969/j.issn.1672-8270.2025.09.014
- VernacularTitle:机器人辅助全膝关节置换术在下肢力线重建中的精准度分析
- Author:
Qiang WANG
1
;
Pengfei CAO
;
Shuaiming SHAO
Author Information
1. 苏州高新区人民医院关节外科 苏州 215129
- Publication Type:Journal Article
- Keywords:
Robot-assisted total knee arthroplasty(RATKA);
Lower limb alignment;
Deviation angle of mechanical axis;
Hospital for special surgery(HSS)knee joint score;
Precision osteotomy
- From:
China Medical Equipment
2025;22(9):67-71
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the precise advantages of robot-assisted total knee arthroplasty(RATKA)in reconstruction of mechanical axis of lower limb,and its influence on early functional rehabilitation.Methods:A prospective cohort design was used.A total of eighty patients with osteoarthritis who underwent total knee arthroplasty(TKA)at the Department of Joint Surgery of The People's Hospital of Suzhou New District between June 2021 and August 2024 were enrolled.According to different surgical method,they were divided into robot-assisted group(n=40)and conventional surgery group(n=40).The deviation angles of mechanical axis were quantified by three-dimensional(3D)imaging under weight-bearing conditions of 3D modeling(EOS)of whole body skeleton at the postoperative 1st week,the 3rd month,and the 6th month.The recovery of function was assessed by using the Hospital for Special Surgery(HSS)knee joint score.Results:The postoperatively average deviation angle of mechanical axis in the robot-assisted group was(1.23±0.67)°,which was significantly lower than the(2.89±1.23)° of the conventional surgery group(t=7.560,P<0.05).The increased extent of angular deviation was smaller with the change of time in the robot-assisted group.The HSS scores at the 6th month after surgery indicated that the score of relieving pain was(28.45±2.34)points in the robot-assisted group,and that was(25.12±3.45)points in the conventional surgery group,and the difference of that between two groups was significant(t=5.12,P<0.05).The score of joint stability was(9.23±0.78)points in the robot-assisted group,and that was(7.89±1.23)points in the conventional surgery group,and the difference of that between two groups was significant(t=5.89,P<0.05).The advantages of the robot-assisted group was significant.The operative time of the robot-assisted group was(98.45±10.23)min,which was significantly longer than the(85.67±9.78)min of the conventional surgery group(t=5.89,P<0.05).However,intraoperative blood loss in the robot-assisted group was(150.34±25.67)mL,which was significantly better than the(220.45±30.12)ml in the conventional surgery group(t=11.23,P<0.05).The total incidence of complication was 5.0%(2/40)in the robot-assisted group,and that was 17.5%(7/40)in the conventional surgery group,and the difference of that between two groups was significant(x2=4.01,P<0.05).Conclusion:RATKA can enhance significantly the reconstructed precision of lower limb alignment through 3D dynamic navigation.The characteristic of its sub-millimeter osteotomy can optimize early functional rehabilitation and reduce risk of postoperative complication.
