Abstract: Methods for soft tissue repair and/or augmentation using injectable, biodegradable polymers are described herein. In one embodiment, the polymer compositions are liquid or pastes at room temperature. In a preferred embodiment, the polymer composition contains liquid or pasty hydroxy fatty acid-based copolyesters, polyester-anhydrides, or combinations thereof. The viscosity of the polymers increases upon contact with bodily fluid to form a solid or semisolid implant suitable for soft tissue repair and/or augmentation. In another embodiment, the polymer composition contains particles of a polymer stereocomplex. One or more active agents may be incorporated into the polymer compositions. Suitable classes of active agents include local anesthetics, anti-inflammatory agents, antibiotics, analgesics, growth factors and agents that induce and/or enhance growth of tissue within the filled cavity or control the growth of a certain type of tissue, and combinations thereof.

Abstract: The invention provides a polycation composition comprising a polysaccharide chain having an amount of saccharide units ranging from 2 to 2000, at least one oligoamine directly grafted to said polysaccharide chain per each segment of 5 saccharide units, wherein said oligoamine is selected from the group consisting of a linear, branched and cyclic alkyl amine having at least two amino groups, and at least one further grafted group selected from the group consisting of a hydrophobic and an amphiphilic group directly grafted to said polysaccharide chain per each segment of 50 saccharide units, wherein said hydrophobic or amphiphilic group includes an aliphatic chain of at least 4 carbons atoms.