The procedure was fairly simply, first Dominic's heart would be stopped, so there would be no blood flow, of course that would result in brain damage so his entire body would be cooled down to stop all metabolic reactions. That gave a few hours of surgery until he's dead. The actual surgery basically involved taking every peace of bone that was in his muscles and blood stream, even the microscopic kind. Then when all of the bone pieces, they were put back together, and reattached to the rest of him, perfectly like they were never broken in the first place