Why can't you get silicone breast implants bigger than 800cc but you can get saline breast implants that are much bigger?

Silicone implants come with a fixed volume.  Saline implants have volume ranges. So they can be overfill. The FDA mandates and makes these rules. The heavier than the implant the more likely it is to cause changes in the skin due to stretching and possibly exposure of the implant.

Currently, the largest size implants that the FDA has approved is 800cc.  Silicone implants are pre filled to the specified volumes.  Saline implants are empty at the time of manufacturing and are filled during surgery with salt water.  There are no larger silicone implants available, but I ask for them all the time and the manufacturing companies are supposedly working on them.  An 800cc saline implant can be over filled (off label) to any volume, which is how saline implants can be much larger.

Good question! I have asked our local reps. the same question as I sometimes find a need for a large size with my breast cancer reconstruction patients.  They say that several other surgeons have asked for 900 cc ++ implants but currently only saline implants will go that high.  Perhaps it is an issue with biomechanics and the design of the implant or perhaps there is not enough demand.