A silicone implant is a breast prosthesis made of a silicone outer shell filled with silicone gel. They are used in breast reconstruction after mastectomy and in cosmetic augmentation. Silicone gel implants are generally considered to feel more similar to natural breast tissue than saline implants, though they require periodic MRI monitoring to check for silent rupture.
What is silicone implant?
Silicone breast implants have been available since the early 1960s and remain one of the most studied medical devices in history. The outer shell is made of silicone elastomer, and the interior is filled with a cohesive silicone gel — a substance that holds together rather than flowing freely, which is why modern versions are sometimes called "gummy bear" implants. This consistency is designed to hold shape even if the shell is damaged.
Compared to saline implants, many surgeons and patients find that silicone gel implants look and feel more like natural breast tissue, particularly in women with a smaller amount of natural breast tissue remaining after mastectomy. This can make them an appealing choice in reconstruction scenarios where achieving a natural appearance and sensation is a priority.
Unlike saline implants, a silicone gel rupture may be "silent" — meaning it does not cause an immediately visible change in the breast. For this reason, the FDA recommends periodic MRI screening (typically starting three years after implant placement and then every two years) to monitor for rupture in silicone implants. If a rupture is detected, a surgeon can discuss whether removal or replacement is appropriate. Today's silicone gel devices are regulated and subject to clinical follow-up requirements, giving your care team the tools to monitor their performance over time.
Why it matters
For women considering breast reconstruction, understanding the differences between silicone and saline implants helps you participate in an informed choice alongside your reconstructive surgeon. The feel, appearance, monitoring requirements, and rupture characteristics of each type are all practical factors worth discussing before surgery.
Both implant types are FDA-regulated with established safety records. Silicone implants do require a commitment to periodic imaging follow-up, which is a real consideration in long-term planning. Asking your surgeon about their recommendation given your specific anatomy and situation — and about what follow-up monitoring will look like — are good questions to raise before proceeding.
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