Patent ID: 7988731

Claim:
A reduced weight implantable breast prosthesis, comprising: a unitary outer surface shell for encapsulating the breast prosthesis; a gel mixture comprising a first gel mixture of a cohesive gel and particles for filling the shell; one or more inner volumes internal to the shell which do not contain said first gel mixture; wherein the first gel mixture contains less than 60% by volume of particles mixed into said cohesive gel, wherein said particles are microspheres, wherein at least one inner volume contains a second gel mixture having a greater percentage of microspheres by volume than said first gel mixture, wherein the second gel mixture of said one or more inner volumes has a specific gravity that is less than the specific gravity of said first gel mixture; wherein said one or more inner volumes containing the second gel mixture are less resilient than said first gel mixture; and wherein the implantable prosthesis is adapted for implantation in the breast.