A method of forming an implant in a tissue can include: providing an injectable liquid composition comprising one or more precursors of a crosslinkable composition; injecting the injectable composition into the tissue at the rate of about 10-12000 injections per minute and/or at an amount of 1.0E-02 ml to 1.0E-16 ml per injection; and crosslinking the one or more precursors of the crosslinkable composition so as to form a crosslinked composition.