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In Silico Modeling Validation and Contact Pressure Distribution Comparison Analysis of Conventional and Robotic-Assisted Unicompartmental Knee Arthroplasty

Year: 2025

Type: article

Abstract: Background: Unicompartmental knee arthroplasty (UKA) improves recovery, but optimizing load remains challenging. This study measures tibiofemoral contact pressures after conventional and robotic UKA in cadavers and validates a finite element (FE) model against experimental data. Methods: Sixteen fresh-frozen cadaveric lower limbs underwent medial UKA with conventional cutting guides (n = 8) or CORI robotic assistance (n = 8). Medial (implanted) and lateral (native) compartment pressures were recorded from 0° to 90° using pressure film sensors. The FE model replicated and was validated against these measurements. Results: values of 0.9994 (medial) and 0.9962 (lateral). Conclusion: Conventional and robotic-assisted UKA techniques demonstrated similar contact pressure profiles. However, increased force and area in the native lateral compartment may predispose to postoperative degeneration. The FE model reliably predicted contact behavior and may be especially useful in refining conventional UKA techniques. Level of Evidence: Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.

Source: JBJS Open Access

DOI: 10.2106/jbjs.oa.25.00176

Authors: Yeseop Park, Katherine Elbert, Jason Koh, Farid Amirouche

Institutions: University of Illinois Chicago, University of Illinois Chicago, Rockford campus, Endeavor Health, University of Chicago

Language: English

Topic: Total Knee Arthroplasty Outcomes

Subfield: Surgery

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $2,250