The advantages of silicone-filled implants include the minimal solubility of silicone and favorable viscosity of the material, which, together, provide a natural feel. The initial silicone implants were composed of a thick outer elastomer shell that was then filled to variable volumes with a silicone gel. Problems associated with silicone implants include capsular contracture, granulomas that develop following leaching of silicone from the implant, and migration of silicone into the axilla. In 1992, the Food and Drug Administration (FDA) temporarily removed silicone implants because of a purported increased incidence of autoimmune phenomena.

Saline implants had also been in use since the 1960s, but the removal of silicone implants from the market in 1992 increased interest in saline implants. The advantages of saline-filled implants are that saline poses no risk to patients and is safely absorbed into the bloodstream if the integrity of implant capsule is compromised. Some studies report that saline implants have a decreased capsular contracture rate compared to silicone implants. However, saline has slightly decreased viscosity compared to silicone.

The initial use of saline implants has resulted in a high incidence of deflation (approximately 10%). Over the last 10 years, implant manufacturers have significantly improved the integrity of implants; specifically, the reliability of the valvular mechanism for introduction of saline into the implant. Late deflation of saline-filled implants, however, remains a significant issue.

http://sexuallubricants.org/miracle-bust/