Do breast implants have and expiration date? Do they need to be replaced?

I know of several women who received implants and have never had to change them. It is a myth that implants must be changed every 10 years. Generally, if you don't have a problem with your implants and haven't noticed any pain or a change in appearance, then there is no need to replace them. However, because you have noticed recently that your implant feels different and are experiencing pain, you should see your surgeon as soon as possible. You may be developing a complication. It is important to note that while changes tend to be more obvious with saline implants, silicone implants that rupture may not be as noticeable and remain undetected for a longer time.You should visit your surgeon or doctor regularly so that they may also examine you to make sure your implants are in good condition. 

Breast implants are not permanent devices, rather they are long-term devices.  Medical devices fail over time.  However, you don't necessarily have to replace them if you are not having any problems.

There is no set rule as to when you should change your implants. Your implants, whether they are Allergan (McGhan) or Mentor (J&J) are warranteed for your lifetime in case of deflation or rupture. You should try not to stress or change your lifestyle to try to avoid implant failure.