We're discussing whether or not breast implants can explode on planes. The simple answer is no. The quality of breast implants that are made today is extremely good. The shells are thick and the consistency of the silicone within the implants is of a high medical grade quality. Therefore, it would be incredibly difficult to rupture a breast implant after anything, changes in elevation, trauma, mammogram, whatever a woman is going to go through.
As you can see here, you can pull on the shell of the implant, you can attempt to stick your finger into it, and they simply do not break. The quality is excellent, and even if I were to take a scissor and cut the implant, it's not the same consistency of silicone that there was 20 years ago that would leak onto the floor. Now it's a consistency more where, it would pooch out a little bit, and then come right back in.
So the simple answer to the question, "Will a breast implant explode on a plane," is no. They're made of very high quality silicone, and they're very difficult to rupture.