MPs with plates surgically implanted in their bodies (usually to repair broken bones).
Angela Dawn Bates
James Roy Bridenstine Jr.
Mary Gertrude Brosley
Alicia Digna
Charles Wane Dodd
Antonio Dominguez
Ricky Lee Frayer
Marco Antonio Guarderas
Billie Jean Hall
Matthew Ellis Keith
Joe David Key
Willy Ray Lecompte
Benjamin Lopez Jr.
Joseph Arthur Martin Jr.
Wilbert Martin
Robert Lawrence Rollins
James S. Ruland
Jonathan Lee Zeigler
The Charley Project Blog 
Charles Fletcher has a steel plate inserted into skull as a result of a war / battle injury according to his NamUs profile.
http://www.charleyproject.org/cases/f/fletcher_charles.html
Vincent Lamouris has plates inserted into his right leg and foot as a result of a suicide attempt by jumping off a building.
http://www.charleyproject.org/cases/l/lamouris_vincent.html
Leah Roberts has a steel (?) rod in her leg as well
Man, that poor Alicia Digna. I’m going to have to pull up her Charley Project profile onto my phone and bookmark it so anytime I feel like my life’s not going well, I’ll just bring it up and be reminded that my life’s absolutely peachy compared to some. How I wish Ms. Digna’s woes could’ve been transferred to a lesser person — a Mr. Bieber, perhaps — so she could’ve had a much better time of things while she wasn’t missing.
Jane Doe from Crescent Beach FL had three burr holes in the skull presumably from a medical procedure. Any ideas who this could be?
Distinctive features as described below:
*Skeletal findings Previous head injury with surgical burr holes. Fractures of nose and cheek bones.Fractures of 5 ribs, left thorax. Fracture of right ankle and toes. Fracture of left ankle. Arthritic changes of the spine. All injuries are suggestive of previous motor
Jane M. Bousley perhaps? I don’t know when the Jane Doe was located. But if you are talking about the one located on 4-10-85, then it’s obviously not her as Ms. Bousley went missing on 10-19-01
http://www.charleyproject.org/cases/b/bousley_jane.html
Unfortunately for that potential maych she was found in @4/85. But keep thinking.