Systems and processes for tracking anatomy, instrumentation, trial implants, implants, and references, and rendering images and data related to them in connection with surgical operations, for example total knee arthroplasties. The buried waste is enclosed in a casing and ground and mixed with the surrounding soil. A plurality of sensors are mounted on, or embedded in, the stretchable material and arranged to undergo, and track in-plane and out-of-plane deformations corresponding to stretching and flexure of the underlying skin. Bearings are placed into the first sleeve and the second sleeve located at the two opposite sides of the supporting arm. When the stress shield is positioned to abut the microelectronic die corners andor edges, the mechanical stresses on the microelectronic die are greatly reduced or substantially eliminated. The thermoplastic elastomer can have good abrasion resistance and antimicrobial activity while possessing low hardness and high strength.