Silicone breast implants are filled with a thick viscous gel composed of polymerized silicone. Its internal contents are designed to recreate the feel of a normal breast. Unlike the collapsible saline implant, a silicone breast implant comes from the manufacturer already pre-filled to a fixed volume. Direct surgical access through an infra-mammary or peri-areolar incision is required to position a silicone breast implant. The newest silicone “cohesive” gel breast implants better preserve the desired shape of the breast implant creating a fuller and more natural-looking breast. In Montreal, silicone cohesive gel breast implants are the most popular choice among women choosing to have breast augmentation.