What Do Breast Implants Look Like when a Woman is 50, 60, 70+ Years Old?

Normal aging can have a significant impact upon a woman’s
breasts. This occurs for a variety of reasons including changes in the hormonal
environment and the effects of gravity. These changes often result in breast
shrinkage and the development of breast sag.Breast implants don’t change significantly with the passage
of time, unless they are accompanied by the development of capsular
contracture. Capsular contractures can result in distortion and firmness of the
breasts. In rare cases, the weight of breast implants can accelerate breast
sag.The development of breast sag appears to be more likely
when patients have poor skin tone and large implants are placed on top of the
muscle. Under these circumstances, a breast lift may be necessary. In rare
cases, the breast pocket may require elevation as well.How aging effects a woman’s breasts and implants depends
upon a multitude of variables. For this reason it can difficult to determine
how aging will affect any particular patient’s situation.

This really depends on how natural her results look. They may continue to look very natural with age, so that nobody every knows that the woman has breast implants. On the other hand, if a woman's breasts look obviously augmented shortly after her surgery, then they will continue to look that way, and perhaps even more so, as she ages. 

Time will change the way the implants look.  If there are no issues with the implants as you age, the breasts will age with you.  The look can be quite natural, and nothing in particular needs to be done as you get older.