Related Experiment Video
Updated: Jun 6, 2025
07:43
In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
Published on: July 2, 2021
3.0K
Radiographic Assessment of Total Knee Arthroplasty Alignment With and Without Accelerometer-Based Navigation at a
Brett G Brazier1, Christian B Allen2, Daryl G Hilyard1
1Department of Orthopaedic Surgery, San Antonio Military Medical Center (SAMMC), San Antonio, Texas.
The Journal of Knee Surgery
|November 22, 2024
Summary
Accelerometer-assisted computer-assisted surgery (aCAS) did not significantly reduce outliers in total knee arthroplasty (TKA) performed by trainees compared to conventional methods. This study suggests no added benefit of aCAS for trainee TKA alignment at training institutions.
Area of Science:
- Orthopedic Surgery
- Surgical Technology
- Biomedical Engineering
Background:
- Malalignment in total knee arthroplasty (TKA) increases prosthetic failure risk and revision surgery needs.
- Conventional (CON) and computer-assisted surgical (CAS) methods aim to improve TKA alignment.
- Accelerometer-based CAS (aCAS) is an intraoperative tool for guiding TKA resections.
Purpose of the Study:
- To compare the incidence of alignment outliers in primary TKAs performed using CON versus aCAS methods.
- To evaluate alignment outcomes in cases involving surgical trainees at a single training institution.
Main Methods:
- Retrospective analysis of 150 primary TKAs (75 CON, 75 aCAS) at a training institution.
- Radiographic assessment of medial distal femoral angle (DFA), medial proximal tibial angle (PTA), and posterior slope angle (PSA).
- Defined outlier criteria for DFA, PTA, and PSA based on established ranges.
Main Results:
- No significant difference in the total number of outliers between aCAS (8%) and CON (9.8%) groups (p=0.508).
- Individual radiographic measurements (DFA, PTA, PSA) also showed no significant differences between the groups.
- Specific outlier rates: DFA (8% vs. 8%), PTA (4% vs. 9%), PSA (12% vs. 12%) for aCAS vs. CON, respectively.
Conclusions:
- Accelerometer-assisted CAS (aCAS) did not demonstrate a significant advantage in reducing alignment outliers in trainee-performed TKAs compared to conventional methods.
- The study suggests no current benefit of using aCAS for improving TKA alignment in training settings involving trainees.
- Further research may explore specific aCAS applications or modifications for trainee education and outcomes.
