Patent ID: 6872819

Claim:
A method for regenerating in vivo mammal tissue comprising applying in vivo to the site requiring such a treatment a biocompatible biomaterial containing at least one hyaluronic acid derivative selected from the group consisting of esters of hyaluronic acid wherein part or all of the carboxy functions are esterified with alcohols of the aliphatic, aromatic, arylaliphatic, cycloaliphatic, heterocyclic series, said hyaluronic acid derivative being processed in the form of a three-dimensional structure enclosing hollow spaces formed by communicating pores and/or fine fibres or microfibres entangled together, wherein: i) said biomaterial is free from cellular components and/or products thereof, ii) when said hyaluronic acid derivative is processed in the form of non woven tissue, it is a hyaluronic acid partial ester with benzyl and has an esterification degree of 65%.