Penile implants are devices placed inside the penis to allow men with erectile dysfunction (ED) to get an erection. Penile implants are typically recommended after other treatments for ED fail.There are two main types of penile implants, semirigid and inflatable. Each type of penile implant works differently and has various pros and cons.The placement of penile implants requires surgery. Before choosing penile implants, make sure you understand what the surgery involves, including possible risks, complications and follow-up care.