Silicone and saline breast implants have an outer silicone shell but different materials inside. Saline implants are filled with sterile salt water, while silicone implants are filled with silicone. Many women feel that silicone breast implants look and feel more natural, so it’s a more popular choice. But both types of implants are safe, come in a variety of sizes and can look natural and beautiful with the right plastic surgeon.  In terms of price, saline implants are cheaper than silicone implants. The price difference can be between $300-$1,000 for the initial surgery. Silicone implants also have higher maintenance costs between which they can leak without you knowing. Therefore, experts recommend having an MRI done 3 years after the procedure and every year after that.