The most common technique combines skin expansion and subsequent insertion of an implant.
Following mastectomy, your surgeon will insert a balloon expander beneath your skin and chest muscle. Through a tiny valve mechanism buried beneath the skin, he or she will periodically inject a salt-water solution to gradually fill the expander over several weeks or months. After the skin over the breast area has stretched enough, the expander may be removed in a second operation and a more permanent implant will be inserted. Some expanders are designed to be left in place as the final implant. The nipple and the dark skin surrounding it, called the areola, are reconstructed in a subsequent procedure.
Some patients do not require preliminary tissue expansion before receiving an implant. For these women, the surgeon will proceed with inserting an implant as the first step.