Rheology of Cosmetic Fillers: G', E', and Tan Delta | Aesthetic Minutes #DermalFillers

What do symbols and words like G', E', tan delta, cohesivity, and viscoelasticity mean? And how are they relevant to the field of aesthetic medicine? In this episode of Aesthetic Minutes, we review the basic science behind the rheology of cosmetic fillers. #Dermal Fillers #FillerRheology #Rheology #Fillers

00:00 - Introduction
00:54 - States of Matter
01:36 - Concept of Rigidity
01:46 - Concept of Elasticity
01:56 - Hooke’s Law of Elasticity
02:17 - Concepts of Stress and Strain
03:50 - Types of Stress
05:04 - Types of Elastic Modulus
06:57 - Concept of Viscosity
07:58 - Newtonian vs. Non-Newtonian Fluids
08:28 - Types of Dispersions
10:05 - Types of Colloids
11:08 - Shear Thickening
12:04 - Shear Thinning
12:44 - Shear Thinning in Hyaluronic Acid Gels
13:39 - Spring Model of Elasticity
14:26 - Dashpot Model of Viscosity
15:21 - Burgers Model of Viscoelasticity
16:16 - Complex Modulus, Storage Modulus, Loss Modulus
17:11 - G’ and G”
17:44 - Tan Delta
18:50 - Cohesivity
19:50 - E’ and E”

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