Preliminary Clinical Outcomes of Domestic Robotic-Assisted Medial Unicompartmental Knee Arthroplasty
WU Xiaoyong
WANG Guojian
KONG Xiangxu
GU Wang
KONG Xiangpeng
NAN Shaokui
LI Haifeng
Abstract：Objective To investigate the accuracy,safety and early efficacy of the domestic NATON robotic-assisted medial unicompartmental knee arthroplasty.Methods A retrospective analysis was performed on 27 patients with anteromedial osteoarthritis of the knee who underwent domestic NATON robotic-assisted medial unicompartmental knee arthroplasty at the Fourth Medical Center of PLA General Hospital from July to October 2022.There were 6 males and 21 females,aged 50.0-77.0(62.2±4.5)years;body mass index ranged from 18.2 to 27.5(23.2±2.5)kg/m².All surgeries were performed with the assistance of the domestic NATON robot,and the LINK SLED unicompartmental knee prosthesis(LINK GmbH,Germany)was used.Unilateral surgery was performed in all patients.The knee varus angle,tibial and femoral component placement angles,Oxford Knee Score(OKS),and Knee Society Score(KSS)were compared before surgery,after surgery,and at the last follow-up.Results All patients were followed up for 18.0-22.0(20.2±1.0)months.At the last follow-up,the coronal tibial component varus angle ranged from-1.2°-4.4°(1.1°±0.7°);the coronal femoral component varus angle ranged from-4.7°-9.4°(3.5°±2.1°).The OKS of the affected knee decreased from(33.4±2.0)preoperatively to(12.2±4.2)at the last follow-up;the KSS clinical score increased from(45.0±11.0)preoperatively to(88.0±3.0);and the KSS functional score increased from(44.0±12.0)preoperatively to(77.0±10.0).All differences were statistically significant(P<0.01).No severe complications such as fracture,infection,or lower extremity venous thrombosis occurred during the follow-up period.Conclusion The domestic NATON robot can assist in the safe performance of medial unicompartmental knee arthroplasty and achieve accurate prosthesis placement,with no severe complications and satisfactory short-term efficacy.
Keywords：roboticskneeunicompartmental knee arthroplastyknee osteoarthritis
Publication Date：2026-03-20
Online Publishing Date：2026-03-26(First online date of this platform, not the publication date of the document)
Pages：5( 403-407 )