Saline is actually the safest way to go. I find it strange that they felt the need to mention the part I bolded. Interesting. I've heard of women with ruptured silicone breast implants that have had some serious health issues.
Breast implants: Saline vs. silicone - MayoClinic.com
Ruptured silicone implant
If a silicone breast implant ruptures, you might not notice right away — or ever — because any free silicone tends to remain trapped in the fibrous tissue (capsule) that forms around the implant. This is known as a silent rupture.
Leaking silicone gel
isn't thought to cause systemic or long-term health problems — such as breast cancer, reproductive problems or connective tissue disease, such as rheumatoid arthritis. Still, a ruptured silicone breast implant might eventually cause breast pain or changes in the contour or shape of the breast.
If this happens, your doctor will likely recommend surgical removal. If you wish, a new implant can usually be inserted at the same time.
If an MRI scan detects an implant rupture but you don't have any signs or symptoms, it might be up to you and your doctor to weigh the risks and benefits of keeping the implant in place or having it removed.