crosslinkable polymers , such as dendritic macromolecules and their in vitro , in vivo , and in situ uses are disclosed . these biomaterials / polymers are likely to be an effective sealant / glue for a variety of surgical procedures where the site of the wound is not easily accessible or when sutureless surgery is desirable . crosslinkable dendritic macromolecules can be fabricated into cell scaffold / gel / matrix of specified shapes and sizes using chemical techniques . the polymers , after being crosslinked , can be seeded with cells and then used to repair or replace organs , tissue , or bones . alternatively , the polymers and cells can be mixed and then injected into the in vivo site and crosslinked in situ for organ , tissue , or bone repair or replacement . the crosslinked polymers provide three dimensional templates for new cell growth that is suitable for a variety of reconstructive procedures , including custom molding of cell implants to reconstruct three dimensional tissue defects . the crosslinked gel can also be used as an endocapsular lens .