All breast implants utilize a silicone shell but the fillings differ, either gel-filled or saline-filled. The outer silicone shell, which give the prosthesis its elasticity and integrity, may be smooth (shiny polished) or textured (finely rough) surface.
There is no doubt that the breasts, augmented with textured implant, providing a disruptive surface for collagen interface, have a lower tendency to develop contracting capsules than the breasts augmented with the smooth implants.
Breast implants may not last a lifetime and the rates of rupture in saline filled implant is higher than the gel filled one.
The implant I always use is Siltex from Mentor cooperation (USA) which is high cohesive & memory gel with texture surface. The implants from Mentor cooperation normally last for life and there is a Lifetime Product Replacement Policy: In my experience, there is no patients who underwent breast implant surgery with me coming back for the problem of quality of this implant at all.