If your saline-filled breast implant ruptures, you or your doctor will be able to tell. When saline-filled breast implants rupture, they deflate and the saline solution leaks into your body immediately or over a period of days. You will notice that your implant loses its original size or shape.
If your silicone gel-filled breast implant ruptures, it is likely that neither you nor your doctor will know. This is known as a silent rupture. This is why MRI is recommended at three years after implantation and then every two years thereafter to screen for rupture. However, sometimes there are symptoms. These symptoms include hard knots or lumps surrounding the implant or in the armpit, change or loss of size or shape of the breast or implant, pain, tingling, swelling, numbness, burning, or hardening of the breast.
Source: http://www.fda.gov/
maybe in the near future there would be natural breast implants that are based on stem cells or something.`-
breast implants will just become ordinary surgical prodedure these days~”
breast implants that are internally filled with saline solution are much safer compared to those silicone oil based type-:`
i personally do not think that breast implants are necessary but if a woman wants a better breast then it is her own decision