Encapsulation of a breast implant that results in capsular contracture is the most common complication after breast enlargement. It is difficult to determine the exact incidence of capsular contractures because different variables have been shown to affect the manifestation of the problem. For example, there are saline implants and there are silicone implants. It is universally accepted that silicone implants lead to a higher chance of capsular contracture, although this is changing due to newer implants that have a better shell and less potential for silicone tissue reaction. Also, the shell of the implant can cause variations in the incidence of capsule contracture. The implant shell is essentially the implant bag, which can be textured or smooth. It is well accepted that the incidence of capsule contracture for textured implants is much less when they are placed over the muscle, but when placed under the muscle both types have similar incidences of capsule contracture. The placement of the implant also affects the incidence of capsular contracture; it is generally accepted that if the implant is placed under the muscle, there is less chance of developing a capsular contracture.