Related Experiment Video
Updated: Mar 14, 2026
In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
Published on: May 5, 2023
Accelerometer-Based, Portable Navigation (KneeAlign) vs Conventional Instrumentation for Total Knee Arthroplasty: A
Monther A Gharaibeh1, Gandhi N Solayar1, Ian A Harris2
1Sydney Knee Specialists, St George Private Hospital, Sydney, New South Wales, Australia.
Background:
Accelerometer-based, portable navigation devices have been introduced as a less invasive and simpler technique to perform navigated surgical implantation of knee prostheses. They have been postulated to have better accuracy than conventional instruments in restoration of alignment in total knee arthroplasty.
Methods:
A total of 190 patients were enrolled in this prospective, randomized controlled trial and underwent total knee arthroplasty using either the KneeAlign or conventional guides. Multiplanar alignment was evaluated with a CT imaging protocol.
Results:
A total of 86.5% of portable navigation device and 82.2% of conventional group had a postoperative hip-knee angle within 3° of neutral alignment (P = .54). There was no significant difference between the 2 groups for component coronal and sagittal plane alignment. Portable navigation device did not significantly increase the time to perform the surgery.
Conclusion:
Portable navigation device demonstrates accurate restoration of alignment; however, there was no statistically significant difference when compared with conventional guides.
