Abstract: The present invention provides a process for preparing a cross-linked biocompatible polysaccharide gel composition, which comprises:forming an aqueous solution of a water soluble, cross-linkable polysaccharide;initiating a cross-linking of said polysaccharide in the presence of a polyfunctional cross-linking agent therefor;sterically hindering the cross-linking reaction from being terminated before gelation occurs, an activated poly-saccharide being obtained; andreintroducing sterically unhindered conditions for said activated polysaccharide so as to continue the cross-linking thereof to a viscoelastic gel. The invention also provides a gel composition obtainable by such a process as well as gel compositions for different medical uses.

Abstract: The present invention provides a biocompatible composition for tissue augmentation, comprising a pseudoplastic polymer carrier in an amount of 0.05-50% (w/w) of the total composition; and one or more tissue augmenting substances(s). Furthermore, the invention comprises a method for tissue augmentation, comprising: injecting the above composition into a desired site of the human or animal body for augmenting the tissue at and around said site.