After implantation of a metallic prosthesis in a patient, damage can occur and surrounding tissues may be modified. We relate these effects by characterizing the soft tissue content. However, the variations in element concentrations can be small and it is necessary to evaluate the instrumental contamination, which we measure in muscular and capsular tissues surrounding the hips of selected corpses. From corpses, which never undergo surgical operations, samples have been cut with different surgical tools. From corpses with hip prosthesis, samples have been cut with scalpels to determine the contamination induced by metallic prostheses. Results give the mineral composition of surgical tools and of muscular and capsular tissues.