The portions of the shell folds against itself and rubs against each other and the result is rupture and leakage. More common is slow leakage. Very small quantities of the soybean oil pass from the shell into the breast on a constant basis. The soybean oil used in the implants acts as a lubricant and provides prolonged resistance to abrasion. For this reason, it is expected that these implants will last as long or longer than silicone gel-filled implants.
Capsular contracture is a common problem associated with breast implants.
This problem appears to occur, but to lesser extent, with trilucent breast implants possible because the bacteria have more difficulty growing in soy oil then in the silicone-gel or saline.