Related Experiment Video
Updated: Mar 17, 2026
07:33
In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
Published on: May 5, 2023
1.2K
Intraoperative Load-Sensing Variability During Cemented, Posterior-Stabilized Total Knee Arthroplasty
Scott R Nodzo1, Vincenzo Franceschini1, Alejandro Gonzalez Della Valle1
1Department of Orthopedics, Hospital for Special Surgery, New York, NY.
The Journal of Arthroplasty
|July 21, 2016
Summary
Load-sensing technology in total knee arthroplasty (TKA) accurately measures ligament balance, with 89% of procedures showing adequate balance. This technology aids surgeons in achieving optimal knee stability during TKA surgery.
Area of Science:
- Orthopedics
- Biomedical Engineering
- Surgical Technology
Background:
- Load-sensing technology offers objective ligamentous balance assessment in total knee arthroplasty (TKA).
- Intraoperative validity and reliability of this technology are crucial for surgical outcomes.
Purpose of the Study:
- To assess the intraoperative validity and reliability of load-sensing technology during TKA.
- To evaluate its effectiveness in achieving ligamentous balance.
Main Methods:
- Fifty-four patients undergoing TKA utilized the OrthoSensor VERASENSE tibial insert for ligament balance.
- Load measurements were taken with trial and definitive implants at various flexion angles.
- Adequate balance was defined as a load differential ≤15 pounds.
Main Results:
- 89% of TKAs achieved adequate balance with both trial and definitive implants.
- A significant linear correlation was found between trial and definitive loads in the medial compartment.
- No correlation was identified in the lateral compartment, and femoral rotation did not significantly alter compartment loads.
Conclusions:
- Load-sensing technology demonstrates validity and reliability for assessing ligamentous balance in TKA.
- Using the transepicondylar axis (TEA) for femoral rotation can achieve balanced flexion gaps without additional ligament releases.
- Higher variability in load measurements was noted in the lateral compartment compared to the medial.
