Cross-linked hyaluronic acid gels are made by chemically bridging linear HA chains into a three-dimensional network. The cross-linking step, called reticulation, fixes the texture of the finished gel: how soft or dense it is, how uniform it is, and how consistent it stays from batch to batch.
Hyaluronic acid is a naturally occurring polysaccharide built from repeating disaccharide units. In its native, linear form it is a viscous, water-binding fluid rather than a gel, and it has no fixed structure of its own. Concentration alone does not turn it into a gel; the chains have to be connected.
Cross-linking introduces chemical bridges between HA chains so that individual chains become one connected network. The number of bridges per unit of HA, the cross-linking density, is the main variable. More bridges give a denser, firmer gel; fewer bridges give a softer, more open gel. Every consistency in a range is, at heart, a different point on this scale.
Reticulation is carried out under controlled temperature, pH and ionic strength. These three parameters decide where bridges form and how evenly the network develops. Uniform reticulation is what gives a gel one consistent texture, rather than dense and loose regions sitting side by side in the same unit.
After reticulation the gel is purified to remove unreacted cross-linker and reaction by-products, then adjusted to its specified HA concentration and packed into 1 ml units. Batch testing confirms concentration, texture and uniformity before a batch is released.
A conventional gel is a single network at a single cross-linking density. PUREMATRIX™, the platform used across the Voleria® range, forms two networks, one flexible and one dense, and interconnects them into a single uniform gel. That is how one platform yields three consistencies: Fine, Mid and Deep.
Author: Uzm. Dr. Selim Orta, Chair of the Academic Board, NEVORA · Published 2026-09-21 · Last updated 2026-09-21