Breast prostheses

A mammary prosthesis for surgical implantation, comprising:

• an outer shell including a non-porous outer envelope made of a biocompatable polymeric material and a porous outer layer surrounding said non-porous envelope;
• said biocompatible polymeric material of said non-porous outer envelope being selected from the group consisting essentially of a polyurethane a polycarbonate urethane, an elastomeric silicone material or a combination thereof, said outer envelope being resistant to in vivo cracking and to prevent leakage therethrough of any filler materials contained therein;
• wherein said polycarbonate urethane polymer of said non-porous outer envelope comprises the reaction product of a reactant charge, said reactant charge including a polycarbonate glycol reactant having terminal hydroxyl groups, a diisocyanate reactant having terminal isocyanate groups, and a chain extender reactant having terminal hydroxyl or amine groups, said reaction product having a hardness of at least about Shore 70 A and having a polymeric backbone having recurring groups selected from a group consisting of urethane groups, urea groups, carbonate groups and combinations thereof;
• said porous outer layer is composed of extruded fibers of a polycarbonate urethane polymer material which is resistant to cracking under in vivo conditions, said fibers positioned on said outer layer in layers overlying and affixed to each other to form a non-woven surface having a network of pores conducive to tissue ingrowth thereinto:
• and
• a soft filler material contained within said outer envelope.

A mammary prosthesis for surgical implantation, comprising:

• an outer shell including a non-porous outer envelope made of a biocompatible polymeric material and a porous outer layer surrounding said non-porous outer envelope, said outer envelope being made from a polycarbonate urethane material resistant to cracking under in vivo conditions when said prosthesis is implanted within a patient;
• said porous layer being composed of extruded fibers selected from the group consisting essentially of a polycarbonate urethane polymer, a polyurethane polymer, an elastomeric silicone material or a combination thereof, said fibers being resistant to in vivo cracking when the prosthesis is implanted within a patient, said fibers positioned on said outer layer in layers overlying and affixed to each other to form a non-woven surface having a plurality of pores conducive to tissue ingrowth thereinto;
• said polycarbonate urethane polymer comprising the reaction product of a reactant charge, said reactant charge including a polycarbonate glycol reactant having terminal hydroxyl groups, a diisocyanate reactant having terminal isocyanate groups, and a chain extender reactant having terminal hydroxyl or amine groups, said reaction product having a hardness of at least about Shore 70 A and having a polymeric backbone having recurring groups selected from a group consisting of urethane groups, urea groups, carbonate groups and combinations thereof;
• and
• a soft filler material contained in said outer envelope.

A mammary prosthesis for surgical implantation, comprising:

• an outer shell including a non-porous polymeric shell and an elastomeric silicone based shell surrounding said polymeric shell;
• said outer shell preventing migration therethrough of any filler material contained therein and being resistant to cracking under in vivo use when the prosthesis is implanted in a patient, said outer shell being made from a polycarbonate urethane material;
• said non-porous polymeric shell being selected from the group consisting essentially of a polyurethane material, a polycarbonate urethane material or a combination thereof and said polycarbonate urethane polymer comprises the reaction product of a reactant charge, said reactant charge including a polycarbonate glycol reactant having terminal hydroxyl groups, a diisocyanate reactant having terminal isocyanate groups, and a chain extender reactant having terminal hydroxyl or amine groups, said reaction product having a hardness of at least about Shore 70 A and having a polymeric backbone having recurring groups selected from a group consisting of urethane groups, urea groups, carbonate groups and combinations thereof;
• a porous layer surrounding said silicone based shell, said porous layer being composed of extruded fibers of a biocompatible material, said fibers positioned on said silicone based shell in layers overlying and affixed to each other to form a non-woven surface having a plurality of pores conducive to tissue ingrowth thereinto;
• and
• a soft filler material contained within said outer shell.

A mammary prosthesis for surgical implantation, comprising:

• an outer shell including a non-porous polymeric shell made from a polycarbonate urethane material and a silicone elastomer shell surrounding and affixed to said polymeric shell;
• a porous layer affixed to said silicone elastomer, said porous layer composed of extruded fibers of a biocompatible material resistant to cracking under in vivo conditions, said fibers positioned on said silicone elastomer shell in layers, said fibers overlying and affixed to each other to form a non-woven surface having a plurality of pores conducive to tissue ingrowth thereinto;
• and
• a filler material contained within said outer shell;
• said outer shell being resistant to cracking under in vivo conditions and preventing the migration therethrough of said filler material contained therein.