Braddock Chen L*
Princeton University, USAFulltext PDF
Steel remains a commonly used metal in orthopedic implants. However, it is often difficult to confirm the exact chemical compositions of the implants during quality control, as the process requires extensive analysis procedures in the laboratory. Nevertheless, this information is important, as it has been shown that variability of steel composition may be responsible for some of the early prosthetic failures. We previously developed a technique to identify metal alloys based on their magnetic signatures. We demonstrated that metals of different chemical compositions would exhibit different electrical conductivity, and thus different magnetic field strengths when evoked by different levels of electric current. We further demonstrated that the electromagnetic signatures could be detected by the internal magnetometers located inside most smartphones as a part of the internal compass. Since 316L is the most commonly used steel in orthopedics implants, in this manuscript we now publish the electromagnetic signatures and magnetic force vectors of 316L steel alloy. This standard signature will now allow implant manufacturers to verify the purity of the 316L steel from suppliers.
Orthopedics; Steel; Implant; Chemical composition; Physical properties; Electromagnetism; Surgery; Medical device
Braddock Chen L. The Analysis of Orthopedic Steel Implant by Static and Dynamic Electromagnetic Signatures. Ann Orthop Musculoskelet Disord. 2023; 5(1): 1038..