Related Experiment Video
Updated: May 10, 2026
09:30
The Synthesis of RGD-functionalized Hydrogels as a Tool for Therapeutic Applications
Published on: October 7, 2016
11.9K
Engineering the Future: Applying Hyaluronic Acid Filler Rheology for Enhanced Efficacy in Aesthetic Applications
Danny J Soares1,2, Gregory P Mueller3, Alexander Rivkin4
1From the College of Medicine, University of Central Florida.
Plastic and Reconstructive Surgery
|September 25, 2025
Summary
Hyaluronic acid fillers have evolved for diverse aesthetic uses, requiring precise rheological properties for optimal performance and safety. Understanding viscoelasticity and viscoplasticity is key to enhancing filler efficacy and minimizing complications.
Area of Science:
- Dermatology
- Materials Science
- Biomedical Engineering
Background:
- Hyaluronic acid (HA) fillers have advanced significantly for aesthetic applications.
- Understanding rheological properties is crucial for optimizing HA filler performance.
- HA gels exhibit viscoelastic and viscoplastic behaviors essential for function.
Purpose of the Study:
- To explore the evolution of HA fillers and their applications.
- To detail the importance of rheological properties (viscoelasticity, viscoplasticity) in HA filler performance.
- To discuss how material characteristics influence filler efficacy and potential complications.
Main Methods:
- Review of rheological and physicochemical assays for HA gel characterization.
- Analysis of how specific rheological parameters (e.g., elastic modulus G', tan δ) relate to application.
- Examination of recent technological advancements in HA filler development.
Main Results:
- Viscoelasticity allows fillers to adapt to tissue movement and resist damage.
- Viscoplasticity is vital for needle extrusion, moldability, and tissue integration.
- Tailoring G' and tan δ can optimize fillers for structural augmentation versus superficial tissue treatment.
Conclusions:
- Precise control over rheological properties enhances HA filler efficacy and safety.
- Material characteristics directly impact complication risks like displacement and inflammation.
- Emerging technologies promise further improvements in HA filler safety, efficacy, and longevity.
More Related Videos
09:39Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
Published on: February 7, 2021
8.7K
10:31Application of a Novel Hyaluronan Hydrogel for Three-Dimensional Follicle Culture and Methodology for Mouse Ovarian Follicle Cryopreservation
Published on: May 9, 2025
742
Related Concept Videos
01:30Environmental Applications of Microorganisms
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
01:29Microorganisms in Medicine and Therapeutics
Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
01:18Bioreactor Controls-II
In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...
01:22Bioreactor Controls-III
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
01:28Methods of Medium Optimization
Optimizing growth media enhances microbial proliferation and maximizes product yield. Statistical experimental design methodologies provide structured and reproducible approaches, offering progressively higher levels of robustness and efficiency.The One-Factor-at-a-Time (OFAT) MethodThe One-Factor-at-a-Time (OFAT) method involves adjusting a single variable while keeping all others constant. However, it cannot detect interactions between variables, often leading to suboptimal outcomes when...
01:30Production of Pharmaceuticals
Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under sterile, tightly...