Next Article in Journal
Binary Amplitude Reflection Gratings for X-ray Shearing and Hartmann Wavefront Sensors
Next Article in Special Issue
How to Quantitatively Balance a Total Knee? A Surgical Algorithm to Assure Balance and Control Alignment
Previous Article in Journal
Modeling and Performance Analysis of Opportunistic Link Selection for UAV Communication
Open AccessArticle

Achieving a Balanced Knee in Robotic TKA

Illinois Bone and Joint Institute, Des Plaines, IL 60016, USA
OrthoSensor Inc., Dania Beach, FL 33004, USA
Author to whom correspondence should be addressed.
Sensors 2021, 21(2), 535;
Received: 9 December 2020 / Revised: 11 January 2021 / Accepted: 12 January 2021 / Published: 13 January 2021
(This article belongs to the Special Issue Smart Sensors Applications in Total Joint Arthroplasty)
Total knee arthroplasty (TKA) surgery with manual instruments provides a quantitatively balanced knee in approximately 50% of cases. This study examined the effect of combining robotics technology with real-time intra-operative sensor feedback on the number of quantitatively balanced cases in a consecutive series of 200 robotic-assisted primary TKAs. The robotics platform was used to plan the implant component position using correctable poses in extension and a manual, centrally pivoting the balancer in flexion, prior to committing to the femoral cuts. During the initial trialing, the quantitative state of balance was assessed using an instrumented tibial tray that measured the intra-articular loads in the medial and lateral compartments. These sensor readings informed a number of surgical corrections, including bone recuts, soft-tissue corrections, and cement adjustments. During initial trialing, a quantitatively balanced knee was achieved in only 65% of cases. After performing the relevant soft-tissue corrections, bone recuts, and cement adjustments, 87% of cases ended balanced through the range of motion. Meanwhile, this resulted in a wide range of coronal alignment conditions, ranging from 6° valgus to 9° varus. It is therefore concluded that gaps derived from robotics navigation are not indicative for a quantitatively balanced knee, which was only consistently achieved when combining the robotics platform with real-time feedback from intra-operative load sensors. View Full-Text
Keywords: balancing; robotic total knee arthroplasty; alignment balancing; robotic total knee arthroplasty; alignment
Show Figures

Figure 1

MDPI and ACS Style

Gordon, A. C; Conditt, M. A; Verstraete, M. A. Achieving a Balanced Knee in Robotic TKA. Sensors 2021, 21, 535.

AMA Style

Gordon AC, Conditt MA, Verstraete MA. Achieving a Balanced Knee in Robotic TKA. Sensors. 2021; 21(2):535.

Chicago/Turabian Style

Gordon, Alexander C; Conditt, Michael A; Verstraete, Matthias A. 2021. "Achieving a Balanced Knee in Robotic TKA" Sensors 21, no. 2: 535.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop