Implants with symmetric shape

1. A breast implant formed from a biocompatible material, the breast implant comprising:

an anterior side extending from a first end to a second end and having a first arc-shaped profile, the first arc-shaped profile defining a first projection with a first apex;

a posterior side extending from a first end to a second end and having a second arc-shaped profile, the second arc-shaped profile defining a second projection similar to the first projection with a second apex; and

a dividing plane corresponding to an equator of the breast implant separating the anterior side from the posterior side;

wherein the first apex is closer to the first end of the anterior side than the second end of the anterior side and the second apex is closer to the first end of the posterior side than the second end of the posterior side;

wherein the anterior side and posterior side form a shell, the shell including:

at least one first layer formed from at least one first material; and

a second layer arranged as an innermost layer of the shell formed from a second material;

wherein the at least one first material is different from the second material.

2. The breast implant of claim 1 , wherein the first apex of the first projection is closer to a midpoint between the first end and the second end than to the first end of the anterior side and the second apex of the second projection is closer to the midpoint than the first end of the posterior side.

3. The breast implant of claim 1 , wherein an apex axis passes through the first apex and the second apex and the apex axis is generally perpendicular to the dividing plane.

4. The breast implant of claim 1 , wherein the dividing plane is generally equidistant from the first apex and the second apex.

5. The breast implant of claim 1 , wherein the breast implant has a rounded shape.

6. The breast implant of claim 1 , wherein the breast implant has an oval shape.

7. The breast implant of claim 1 , wherein the breast implant has a teardrop shape.

8. A breast implant comprising:

a shell defining an interior cavity and including a first end longitudinally spaced from a second end, a posterior side having a first curved profile, and an anterior side having a second curved profile, the posterior side and anterior side are separated by a plane extending between the first end and the second end;

wherein the shell has at least two planes of symmetry;

wherein the shell has at least a first layer and a second layer, the second layer is different from the first layer and the second layer comprises a low diffusion barrier material; and

a filler material disposed within the interior cavity of the shell.

9. The breast implant of claim 8 , wherein the second layer is an innermost layer of the shell and is in contact with the filler material and comprises the low diffusion barrier material.

10. The breast implant of claim 8 , wherein a first apex of the first curved profile is generally aligned with a second apex of the second curved profile.

11. A breast implant comprising:

a shell formed from a biocompatible material and defining an interior cavity, the shell including:

a plurality of layers including at least a first plurality of layers and a second plurality of layers;

wherein the first plurality of layers is a different material than the second plurality of layers;

a posterior side having a first rounded profile;

an anterior side having a second rounded profile;

an upper side; and

a lower side;

wherein a first end of the posterior side and a first end of the anterior side meet at a first point at one of the upper side or the lower side, and a second end of the posterior side and a second end of the anterior side meet at a second point at the other of the upper side or the lower side;

wherein a plane connecting the first point and the second point includes an equator of the shell; and

a filler material disposed within the interior cavity.

12. The breast implant of claim 11 , wherein the filler material comprises a silicone material.

13. The breast implant of claim 12 , wherein the silicone material comprises a silicone gel.

14. The breast implant of claim 11 , wherein the posterior side and the anterior side are symmetrical about the equator of the shell.

15. The breast implant of claim 11 , wherein the biocompatible material of the second plurality of layers comprises a low diffusion barrier material.

16. The breast implant of claim 15 , wherein the second plurality of layers is an innermost layer of the shell.

17. The breast implant of claim 16 , wherein the second plurality of layers is in contact with the filler material disposed within the interior cavity.