A subdermal implant is a body modification placed under the skin, allowing the body to heal over the implant and creating a raised design. Such implants fall under the broad category of body modification. Many subdermal implants are made out of silicone, either carved or mold injected. Many people who have subdermal implants use them in conjunction with other types of body modification to create a desired, dramatic effect. This process is also known as a 3-D implant, or pocketing.
Cosmetic subdermal implants on the lower arm
A dermal punch, used for transdermal implants, creates a large initial hole by removing a disk of skin.
Microchip implant (human)
A human microchip implant is any electronic device implanted subcutaneously (subdermally) usually via an injection. Examples include an identifying integrated circuit RFID device encased in silicate glass which is implanted in the body of a human being. This type of subdermal implant usually contains a unique ID number that can be linked to information contained in an external database, such as identity document, criminal record, medical history, medications, address book, and other potential uses.
A surgeon implants an RFID microchip in the left hand of British scientist Dr Mark Gasson (March 16, 2009)
An X-ray of a biohacker's hand showing several implants.