Implants are not permanent and will need to be replaced at some point. Most implants will last a minimum of 20 years however. The rupture rate is roughly 10% at twenty years which is very acceptable. Excellent warranties are provided by the two implant manufacturers which cover almost the entire cost of replacement surgery and also provide for free implants. You can rely on the fact that your results will be long-lasting and it should be many years before you need to consider any revisional surgery.