Rheological Characterization of Different Fat-Derived Products.

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Background Fat grafting has been widely used to correct soft-tissue volume loss and facial rejuvenation. Recent innovative advances have led to different types of fat-derived products. Although the composition of cells and extracellular matrix within different fat products has been reported, their physical and rheological properties are poorly defined. Objectives The authors of this study aim to evaluate the rheological properties of different fat-derived products and assess how these properties change after transplantation. Methods In this study, the authors assessed the rheological properties of 4 fat-derived products-adipose matrix complex AMCs, high-density fat (HDF), stromal vascular fraction-gel (SVF-gel), and Coleman fat-before and after transplantation. Key parameters, including elastic modulus (G'), viscous modulus (G″), tan delta (tan δ), and yield stress (τy), were measured using a rheometer. Results Before transplantation, AMC exhibited the highest G' and G″, followed by SVF-gel, HDF, and Coleman fat. After transplantation, G' decreased for all products, indicating reduced elasticity, while G″ increased, suggesting increased viscosity. AMC maintained the highest G' and G″ even after 3 months, with SVF-gel and HDF showing similar values. Coleman fat had the lowest G' and G″ at all time points. Conclusions Fat-derived products have distinct clinical applications based

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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