Final answer:
Silicone and saline implants are two common types of implants used in breast reconstruction. They are small fluid-filled sacs that are placed behind the pectoral muscle.
Step-by-step explanation:
The two common types of implants used in breast reconstruction are silicone or saline implants. These implants are small fluid-filled sacs that are placed behind the pectoral muscle. Silicone implants are filled with a silicone gel, while saline implants are filled with a sterile saltwater solution.