A structured saline implant is a saline-filled device with an internal structure — typically nested shells — designed to control the movement of the saline and give a more natural feel than a simple saline-filled shell.
The idea
By breaking up the fluid into chambers, structured saline implants reduce the sloshing and rippling associated with traditional saline, while keeping saline's main advantage: if the shell fails, the body simply absorbs the harmless salt water and the deflation is obvious.
Who might consider them
They appeal to patients who prefer a saline fill — for example to avoid silent silicone rupture — but want a more natural result. Availability varies, and most UK patients are offered cohesive silicone gel; discuss whether structured saline is appropriate and available with your surgeon.