Robot-assisted total knee arthroplasty accurately restores the joint line and mechanical axis. A prospective randomised study.
Robot-assisted Total Knee Arthroplasty (TKA) improves the accuracy and precision of component implantation and mechanical axis (MA) alignment. Joint-line restoration in robot-assisted TKA is not widely described and joint-line deviation of>5mm results in mid-flexion instability and poor outcomes. We prospectively randomised 60 patients into two groups: 31 patients (robot-assisted), 29 patients (conventional). No MA outliers (>±3° from neutral) or notching was noted in the robot-assisted group as compared with 19.4% (P=0.049) and 10.3% (P=0.238) respectively in the conventional group. The robot-assisted group had 3.23% joint-line outliers (>5mm) as compared to 20.6% in the conventional group (P=0.049). Robot-assisted TKA produces similar short-term clinical outcomes when compared to conventional methods with reduction of MA alignment and joint-line deviation outliers.
Orthopaedic Surgery Department, Singapore General Hospital, Singapore.
Ming Han Lincoln
MH
Liow
Orthopaedic Surgery Department, Singapore General Hospital, Singapore.
Zhan
Z
Xia
Orthopaedic Surgery Department, Singapore General Hospital, Singapore.
Merng Koon
MK
Wong
Orthopaedic Surgery Department, Singapore General Hospital, Singapore.
Keng Jin
KJ
Tay
Orthopaedic Surgery Department, Singapore General Hospital, Singapore.
Seng Jin
SJ
Yeo
Orthopaedic Surgery Department, Singapore General Hospital, Singapore.
Pak Lin
PL
Chin
D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods; D017760:Bone Malalignment / Q000000981:diagnostic imaging / Q000209:etiology / Q000517:prevention & control*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging* / Q000601:surgery; D011446:Prospective Studies; D011859:Radiography; D065287:Robotic Surgical Procedures; D012399:Rotation; D016896:Treatment Outcome
ROBODOC; joint line restoration; mechanical axis; robot-assisted total knee arthroplasty; robotic knee surgery