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Robotic-assisted vs conventional surgery in medial unicompartmental knee arthroplasty: a clinical and radiological study

Knee Surgery & Related Research 2021년 33권 1호 p.5 ~ 5
Negrin Roberto, Duboy Jaime, Iniguez Magaly, Reyes Nicolas O., Barahona Maximiliano, Ferrer Gonzalo, Infante Carlos, Jabes Nicolas,
소속 상세정보
 ( Negrin Roberto ) - Clinica Las Condes Department of Orthopedics and Traumatology
 ( Duboy Jaime ) - Clinica Las Condes Department of Orthopedics and Traumatology
 ( Iniguez Magaly ) - Clinica Las Condes Department of Orthopedics and Traumatology
 ( Reyes Nicolas O. ) - Clinica Las Condes Department of Orthopedics and Traumatology
 ( Barahona Maximiliano ) - Universidad de Chile Hospital Clinico Department of Orthopaedic Surgery
 ( Ferrer Gonzalo ) - Clinica Las Condes Department of Orthopedics and Traumatology
 ( Infante Carlos ) - Clinica Las Condes Department of Orthopedics and Traumatology
 ( Jabes Nicolas ) - Clinica Las Condes Department of Orthopedics and Traumatology

Abstract


Background: The use of unicompartmental knee arthroplasty (UKA) has increased and new technologies have been developed to improve patient survival and satisfaction, soft tissue balance, alignment, and component size. Robot-assisted systems offer an increase in surgical precision and accuracy. The purpose of this study is to evaluate the precision of component position using five radiological parameters in conventional and robotic-assisted medial UKA using the NAVIO system.

Methods: A cohort study was designed for patients who underwent medial UKA between April 2017 and March 2019 in a single center. Patients were allocated in the conventional (UKA-C) or robotic-assisted (UKA-R) group. The variables analyzed were age, gender, affected knee side, length of hospital stay, surgical time, and radiological measurements such as anatomical medial distal femoral angle (aMDFA), anatomical medial proximal tibial angle (aMPTA), tibial slope, the sagittal femoral angle, and the component size. A target was defined for each measurement, and a successful UKA was defined if at least four radiological measures were on target after surgery. Also, patients’ reported outcomes were evaluated using the Oxford Knee Score (OKS) and a numeric rating scale (NRS) for pain.

Results: Thirty-four patients were included, 18 of them underwent UKA-R. The success rate for UKA in the UKA-R group was 87%; meanwhile, in the UKA-C group this was 28%, this difference was significant and powered (Fisher’s exact test, p =?0.001; 1 ? β =?0.95). Also, a 5-point difference in favor of the UKA-R group in the median OKS (p =?0.01), and a significantly lower median NRS for pain (p
Conclusions: UKA-R achieved more precision in the radiological parameters’ measure in this study. Also, UKA-R has a trend towards a better OKS and a lower NRS for pain at short-term follow-up.

키워드

Unicompartmental knee; Robotic-assisted surgery

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