High accuracy of a new robotically assisted technique for total knee arthroplasty: an in vivo study

Abstract

Purpose Over the last decade, robotic TKA gained popularity for improving the accuracy of implant positioning and reducing outliers in limb alignment comparing to conventional jig-based TKA. Hypothesis of this study was that this newly designed robotically assisted system will achieve a high level of accuracy for bone resection. Purpose of the study was to evaluate the accuracy of the system. Methods For this study, 75 knees in 75 patients were operated using a new, robotic system (ROSA ® Knee System; Zimmer Biomet, Warsaw, IN) with a Posterior Stabilized Total Knee Arthroplasty (Persona ® Knee System). The planned, validated and measured angles and cuts for the distal and posterior femur, for the proximal tibia and for the final coronal alignment on long standing x-rays were compared. Results A statistically significant difference was found only between the average planned and the average validated angle for femoral flexion, tibial coronal axis, medial and lateral cuts; the average difference was in any case below 1 mm or under 1 degree with SD < 1. No statistical difference was found between planned validated and measured cuts. Average difference between planned HKA and measured was 1.2 ± 1.1. No statistically significant difference was found. Conclusions The results of this study demonstrated that using this new surgical robot in total knee arthroplasty it is possible to perform accurate bone cuts and to achieve the planned angles and resections.

A novel robot-assisted knee arthroplasty system (ROSA) and 1-year outcome: A single center experience

“…178.2 ± 1.2 in all patients. [23] In our study, we found the angles to be compatible with the literature. There were some limitations in our study.…”

Introduction of ROSA robotic-arm system for total knee arthroplasty is associated with a minimal learning curve for operative time

“…Secondly, while we analysed the learning curve on implant component sizing, we were unable to report on the learning curve associated with component positioning. However, other studies have reported on component positioning and limb alignment with the use of robotic systems [ 11 , 17 , 22 , 30 ]. Third, we have reported that there were no adverse events associated with the introduction of the system in this centre.…”

“…The ROSA® (Robotic Surgical Assistant) Knee system (Zimmer Biomet, Warsaw, Indiana, USA) for TKA was recently introduced. ROSA can be considered collaborative robotics, where the surgeon remains in charge of the procedure but collaborates with a smart robotic tool to perform the surgery with high accuracy and reproducibility [ 2 , 21 , 22 ]. The advantages of ROSA compared with other RA TKA include: requiring only radiographs for pre-operative planning, a collaborative robotic system where the robot completes the surgeon skills, and predictive robotics with machine learning incorporated into the system [ 2 , 13 ].…”

Navigation und Robotik in der Totalendoprothetik des Kniegelenks – Evidenz?

“…Beim mechanischen Alignment gelten dabei Abweichungen von mehr als 3°als Outlier, beim individualisierten Alignment ist dieser Korridor wahrscheinlich sogar kleiner. Die überwiegende Literatur vergleicht die unterschiedlichen dargestellten Technologien jeweils gegen den manuellen Standard, und wenig überraschend zeigt sich für alle Systeme ein Vorteil pro Robotik in Bezug auf die jeweils untersuchten radiologischen Parameter [33,34,35,36]. Vergleichende Studien zwischen robotischen Systemen und der konventionellen Navigation in Hinblick auf die Operationspräzision (radiologisches Alignment) sind kaum verfügbar, und bisher konnte kein wesentlicher Unterschied gezeigt werden [37].…”