We generally use polyurethane-coated implants from Polytech, which are produced in Germany. One of the advantages of these is that they have shown very long acceptance periods in studies. This means that the implants could be left in place for several decades without causing discomfort. As a general rule, breast implants do not necessarily have to be replaced after a certain period of time unless symptoms occur. However, we recommend that you have an annual ultrasound examination of the breast.