Session Title: Virtual Poster Hall
Session Time: None. Available on demand.
Disclosures: Lin Wang, n/a: No financial relationships or conflicts of interest
Objective: A FEA simulation of ACL reconstruction provides quantitative evidence in predicting and evaluating an individual postoperative effect under different surgical designs.
Design: A clinical postoperative knee was taken as the subject. The grafts were composed from semitendinosus tendon and gracilis tendon. The ST was triple folded to replace ACL, and a single GT was used to replace ALL. The tri-folded ST and the GT were sutured as one graft. The graft was sutured and fixed by 3 screws on the femur. Setting : The geometry of the 3D knee model including bones and soft tissues was scanned and regenerated including femur, tibia, patella bones and menisci, also the starting and ending positions of the ACL, ALL, MCL, PCL, QT, PT. The ligaments were simplified as strings for less calculation and time consuming in the FE model. Participants : The material properties were selected from previous literature. The body weight was counted as the static loading at the gravity center.
Interventions: The material properties were selected from previous literature listed in a recent review paper. One inch below the belly button was measured and considered as the gravity center of the subject. The body weight was counted as the static loading.
Main Outcome Measures: The ACL was represented by five truss elements in the simulation. The von Mises stress on five truss elements were 3.45MPa, 4.08MPa, 4.68MPa, 5.21MPa, 5.54MPa from anterior to posterior in sagittal plane correspondingly.
Results: The stress concentration of 67.2MPa was found at the attachment of ACL on femur. The stress of the ACL was 1.08-1.76MPa in the surgical design without ALL. It showed that the associated with ALL would reduce 3.9-7.4% of the load on the ACL . Conclusions: A positive stress reduce combining with ALL comparing with previous work. Further study will use the real-time dynamics analysis for more accurate evaluation in rehabilitation.
Level of Evidence: Level I
To cite this abstract in AMA style:Wang L, Wang Q. A Quantitative Analysis on the Postoperative Effect of ACL Reconstruction Associated with Anterolateral Ligament [abstract]. PM R. 2020; 12(S1)(suppl 1). https://pmrjabstracts.org/abstract/a-quantitative-analysis-on-the-postoperative-effect-of-acl-reconstruction-associated-with-anterolateral-ligament/. Accessed July 30, 2021.
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PM&R Meeting Abstracts - https://pmrjabstracts.org/abstract/a-quantitative-analysis-on-the-postoperative-effect-of-acl-reconstruction-associated-with-anterolateral-ligament/