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”

[jrm]

I'm floored! Dr. Soares has explained a lot of VERY abstract concepts in a VERY practical, VERY easy to understand way. This 20 minute video succeeded in elucidating many of my questions from HOURS of watching videos given by droning physics professors scribbling formulas (for the 10, 000th time). Of course, the formulas are indispensable but there needs to be a connection between the math and the physical. Thank you!

[giogaro]

this 20 minutes video was more helpful than a whole university course I attended. really

[fatcammal]

this guy is a genius at explaining complex topics. good job.

[mujtabarizvi]

your 20 minutes are more useful than my entire semester!

[ethangormong]

This video was beyond helpful. I am required to do a lot of rheology in my new R&D job, and this video really helped me brush up on some of the underlying concepts. Well done, and thanks so much for putting this together!

[mikegoossens]

Easily best way to learn the basics of rheology, far better explaned than anything else I found online!

[CristianIonita-nmxb]

The best video on the topic bar none. Excellent work.

[amirrezaeiosalou]

comprehensive, detailed, and compact information, Thank you....

[afsanehkhosravi]

Thank you, it is excellent. It is a detailed and comprehensive video in simple words. I digest this subject much better than during my bachelor :)

[timmyhascer]

this explanation seems to make the day a little bit brighter.. thank you

[erickzevallos]

I am pleasuared !! You are the best, now I can undertand easily the papers

[iulialungu]

Loved this super extensive nerdy explanation!

[migueltoj]

Excellent video. There are clear distinctions to understanding the moduli... the concepts apply similarly across different types of shear... and without these distinctions, it is easy to lose track of what symbols mean what and where. Cheers

[anuphilip]

Extremely useful and explained very well!

[_d]

Thank you, this is very clear to understand. This video really helped!

[slilachayanun]

Thank you so much for this, you teach this better than my physic teacher, cheers <3

[hyuckkcuyh]

thank you so much, finally something easy to understand

[nsgnsg]

that was an incredible explanation of rheology related to fillers. amazing.

[haddazebiri]

you explained it very good in a very easy way, bravo

[laurenothoigbe]

You are extremely good .thank you so much. This was very helpful