In this article, we will talk about the properties of best mesotherapy brands and dermal fillers. Injectable dermal fillers based on hyaluronic acid are very popular today. They have a number of advantages: efficiency, safety, have a natural and long-lasting effect with a minimal recovery period. Depending on the concentration of hyaluronic acid and how it is bound, fillers have different physical, including rheological properties.
One of the most important rheological properties of fillers is the G* index (“gel hardness”), which is the ratio of viscosity to elasticity. Preparations that are not cohesive – that is, have little substance adhesion strength – are inversely proportional to the G index. Cohesiveness is the ability of the gel to remain a homogeneous substance, a single unit. The maximum effectiveness of the filler requires a combination of two properties: plasticity and elasticity.
Those products that stay well and stably in the injection zone are highly cohesive and are able to resist external pressure. However, having a high resistance and deformation profile, they can contribute to excessive swelling. This is unacceptable, for example, on the back of the nose, as ischemization of the surrounding tissues can develop. Therefore, it is important to know the concentration of the molecular weight of the drug, the amount of stabilizers in it and the ratio of the plastic component (G*) to the elastic component (G”).
Indications for hyaluronic acid injections
Injections of fillers based on hyaluronic acid are used in cosmetology relatively recently. Their introduction is indicated for the correction of various cosmetic skin defects, which include:
- Filling of folds or wrinkles to smooth them out.
- Lip augmentation and lip shape correction.
- Correction of the shape of the face, tightening its oval shape, elimination of asymmetry.
- Correction of the shape of cheekbones, chin, nose tip and wings.
- Filling of hypotrophic skin scars (hollow scars).
- Also, with the help of fillers, bioreinforcement of the face and other areas of the body is carried out, which is a skin tightening.
Monophasic fillers
All molecules of such fillers and particles have identical sizes. Such fillers have a more fluid consistency and are easier to inject under the skin. Also, monophasic fillers are easier to correct once they are injected under the skin. The cosmetic surgeon can give the necessary shape to the corrected area of the skin with his fingers. The degradation process (gradual dissolution of hyaluronic acid) is fairly rapid, so usually after six months you need to re-inject the filler under the skin.
Biophase fillers
Hyaluronic acid molecules are larger in size, resembling filaments. They are bonded together by an additional chemical compound. Due to these chemical characteristics, biophasic fillers have a denser consistency, they are a little more difficult to be injected under the skin, as well as the subsequent correction of the shape after injection. The main advantage of such fillers is a longer period of degradation of hyaluronic acid in tissues (more than six months).